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1. Role of the nuclear and electromagnetic interactions in the coherent dissociation of the relativistic 7Li nucleus into the 3H + 4He channel

Author: V. N. Fetisov, N. G. Peresadko, E. I. Tamm, V. A. Dronov, S. G. Gerasimov, Yu. A. Aleksandrov, V. G. Larionova, and S. P. Kharlamov
Subjects: Diffraction, Physics, Scattering cross-section, medicine.anatomical_structure, Physics and Astronomy (miscellaneous), Transverse momentum, Coulomb, medicine, FOS: Physical sciences, Nuclear Experiment (nucl-ex), Atomic physics, Nuclear Experiment, Nucleus
Abstract: The differential cross section in the transverse momentum $Q$ and a total cross section of $(31\pm4)$ mb for the coherent dissociation of a 3-A-GeV/$c$ $^7$Li nucleus through the $^3$H$+^4$He channel have been measured on emulsion nuclei. The observed $Q$ dependence of the cross section is explained by the predominant supposition of the nuclear diffraction patterns on light (C, N, O) and heavy (Br, Ag) emulsion nuclei. The contributions to the cross section from nuclear diffraction ($Q\le400$ MeV/$c$) and Coulomb $(Q\le50$ MeV/$c$) dissociations are calculated to be 40.7 and 4 mb, respectively., ISSN 0021-3640, Pleiades Publishing, Ltd., 2008
Published: 2008

2. Fragmentation channels of relativistic 7Be nuclei in peripheral interactions

Author: S. Vokal, V. V. Rusakova, Yu. A. Aleksandrov, S. P. Kharlamov, N. G. Peresadko, P. I. Zarubin, Alexander Kovalenko, V. G. Larionova, V. Bradnova, V. N. Fetisov, S. G. Gerasimov, V. A. Dronov, I. G. Zarubina, Alexander Malakhov, and P. A. Rukoyatkin
Subjects: Nuclear reaction, Physics, Nuclear and High Energy Physics, Meson, Neutron emission, Isotopes of lithium, FOS: Physical sciences, Atomic and Molecular Physics, and Optics, Helium-4, medicine.anatomical_structure, Fragmentation (mass spectrometry), medicine, Nuclear Experiment (nucl-ex), Atomic physics, Nuclear Experiment, Isotopes of helium, Nucleus
Abstract: Nuclei of $^7$Li were accelerated at the JINR Nuclotron. After the charge-exchange reaction involving these nuclei at an external target a second $^7$Be beam of energy 1.23A GeV was formed. This beam was used to expose photo-emulsion chambers. The mean free path for inelastic $^7$Be interactions in emulsion $\lambda$=14.0$\pm$0.8 cm coincides within the errors with those for $^6$Li and $^7$Li nuclei. More than 10% of the $^7$Be events are associated with the peripheral interactions in which the total charge of the relativistic fragments is equal to the charge of the $^7$Be and in which charged mesons are not produced. An unusual ratio of the isotopes is revealed in the composition of the doubly charged $^7$Be fragments: the number of $^3$He fragments is twice as large as that of $^4$He fragments. In 50% of peripheral interactions, a $^7$Be nucleus decays to two doubly charged fragments. The present paper gives the channels of the $^7$Be fragmentation to charged fragments. In 50% of events, the $^7$Be fragmentation proceeds only to charged fragments involving no emission of neutrons. Of them, the $^3$He+$^4$He channel dominates, the $^4$He+d+p and $^6$Li+pchannels constitute 10% each. Two events involving no emission of neutrons are registered in the 3-body $^3$He+t+p and $^3$He+d+d channels. The mean free path for the coherent dissociation of relativistic $^7$Be nuclei to $^3$He+$^4$He is 7$\pm$1 m. The particular features of the relativistic $^7$Be fragmentation in such peripheral interactions are explained by the $^3$He+$^4$He 2-cluster structure of the $^7$Be nucleus., Comment: 10 pages, 3 figures, 3 tables, conference: Conference on Physics of Fundamental Interactions, Moscow, Russia, 5-9 Dec 2005
Published: 2007

3. Dissociation of relativistic7Li in photoemulsion and structure of7Li nucleus

Author: V. G. Larionova, S. P. Kharlamov, N. G. Peresadko, V. A. Dronov, M. I. Adamovich, S G Gerassimov, and Yu.A. Alexandrov
Subjects: Physics, Nuclear reaction, Nuclear and High Energy Physics, Nuclear Theory, Nuclear structure, Alpha particle, Fermion, Dissociation (chemistry), Charged particle, law.invention, Nuclear physics, law, Atomic physics, Synchrophasotron, Nuclear Experiment, Nucleon
Abstract: The dissociation of relativistic 7Li nuclei was studied with the photoemulsion technique. The nuclear photoemulsions have been exposed in the beam of 7Li at the momentum of 3 A GeV/c at the JINR synchrophasotron in Dubna. Along the scanned length 239.76 m of 7Li tracks, 1675 inelastic interactions have been found. For the first time the coherent dissociation of the relativistic 7Li nuclei into the (α + t) channel in the nuclear photoemulsion has been detected. The mean free path of this channel in emulsion is equal to 5.4 m and corresponds to the cross section which is equal to 23 ± 5 mb. Previously in the dissociation of the relativistic 6Li nuclei it was found that the main di-cluster configuration of the ground state of 6Li manifests itself as the main channel of coherent dissociation into α-particle and deuteron. The close values of relative yields and kinematic features of these two-particle dissociation channels of 7Li and 6Li suggest that a similar di-cluster configuration consisting of α-particle core and bound together outer nucleons predominates in the dissociating nuclei at relativistic energies also. The data presented prove the validity of the relativistic nuclei dissociation as an effective complementary method for the study of nuclear structure.
Published: 2004

4. Nuclear clustering in processes of relativistic multifragmentation

Author: Alexander Malakhov, S. P. Kharlamov, L.A Goncharova, N. G. Peresadko, P. A. Rukoyatkin, M. M. Chernyavsky, Maria Haiduc, G. I. Orlova, V. Bradnova, B. B. Simonov, S. Vokal, V. G. Larionova, A. Sh. Gaitinov, L. Just, N. G. Polukhina, Alexander Kovalenko, F. G. Lepekhin, N. A. Salmanova, P. I. Zarubin, V. V. Rusakova, and I. G. Zarubina
Subjects: Physics, Nuclear reaction, Nuclear and High Energy Physics, Particle physics, Isotope, Nuclear Theory, Nuclear physics, Isotopes of neon, Nucleosynthesis, Nuclear Experiment, Nucleon, Cluster analysis, Isotopes of beryllium, Beam energy
Abstract: Unique capabilities of emulsion technique are considered as applied to the study of multifragmentation of light stable and radioactive nuclei in peripheral interactions at beam energy of few GeV per nucleon. The importance of this research for the physics of few body nuclear systems and the related problems of nucleosynthesis is noted. New results on dissociation of 7 Be and 22 Ne in very peripheral interactions with emulsion nuclei are presented as an illustration.
Published: 2004

5. Flow effects in high-energy nucleus collisions with Ag(Br) in emulsion

Author: V. Bradnova, M.I. Tretyakova, P. I. Zarubin, N. A. Salmanova, V. A. Plyushchev, S. Vokal, V. I. Bubnov, Maria Haiduc, V. V. Rusakova, A.M. Seitimbetov, S. P. Kharlamov, I. A. Lebedev, D. Hasegan, N. G. Peresadko, N. P. Andreeva, Alexander Kovalenko, T. P. Trofimova, N. Saidkhanov, A. S. Gaitinov, N. S. Lukicheva, V. G. Larionova, S.Z. Nasyrov, V. S. Navotny, O. V. Levitskaya, L. N. Philippova, M. M. Chernyavsky, E. S. Basova, A. Kravcčáková, L. Just, K. G. Gulamov, G. I. Orlova, E. K. Kanygina, Janka Vrlakova, A.K. Musaeva, M. I. Adamovich, S.A. Krasnov, and S. I. Zhokhova
Subjects: Physics, Nuclear and High Energy Physics, Plane (geometry), Projectile, Elliptic flow, Atomic and Molecular Physics, and Optics, Relativistic particle, Azimuth, medicine.anatomical_structure, Flow (mathematics), medicine, Atomic physics, Nuclear Experiment, Nucleus, Fourier series
Abstract: Various flow phenomena observed by a unique emulsion method are reviewed. The experimental data of the emission of projectile and target fragments and relativistic particles in collisions of 1–160 A GeV/c16O, 22Ne, 28Si, 32S, 84Kr, 197Au, and 208Pb nuclei with 108Ag (80Br) targets are investigated. The transverse-momentum approach, the flow-angle analysis using principal vectors, the azimuthal correlation functions, the method of azimuthal correlations between charged secondaries, and the method of Fourier expansion of the azimuthal angle distributions are applied. Evidence of the directed flow of spectators has been obtained in the medium-impact nuclear interactions. In azimuthal distributions, with respect to the reaction plane, the signal of the elliptic flow of participants has been observed.
Published: 2004

6. Beryllium (boron) clustering quest in relativistic multifragmentation (BECQUEREL Project)

Author: S. P. Kharlamov, N. G. Polukhina, S. Vokal, N. G. Peresadko, Alexander Kovalenko, V. Bradnova, N. A. Salmanova, F. G. Lepekhin, V. G. Larionova, P. A. Rukoyatkin, V. V. Rusakova, B. B. Simonov, K. A. Kotel’nikov, Maria Haiduc, P. I. Zarubin, V. A. Krasnov, Alexander Malakhov, G. I. Orlova, M. M. Chernyavsky, and L. Just
Subjects: Physics, Nuclear and High Energy Physics, Nuclotron, Physics::Instrumentation and Detectors, Nuclear Theory, chemistry.chemical_element, Atomic and Molecular Physics, and Optics, Nuclear physics, medicine.anatomical_structure, chemistry, Becquerel, Fragmentation (mass spectrometry), medicine, Physics::Accelerator Physics, Irradiation, Beryllium, Nuclear Experiment, Cluster analysis, Boron, Nucleus
Abstract: A physical program of irradiation of emulsions in beams of relativistic nuclei named the BECQUEREL Project is reviewed. It is destined to study in detail the processes of relativistic fragmentation of light radioactive and stable nuclei. The expected results would make it possible to answer some topical questions concerning the cluster structure of light nuclei. Owing to the best spatial resolution, the nuclear emulsions would enable one to obtain unique and evident results. The most important irradiations will be performed in the secondary beams of He, Be, B, C, and N radioactive nuclei formed on the basis of JINR Nuclotron beams of stable nuclei. We present results on the charged state topology of relativistic fragmentation of the 10B nucleus at low energy-momentum transfers as the first step of the research.
Published: 2003

7. Flow effects in 84Kr induced collisions in emulsion at 0.95 GeV per nucleon

Author: M. I. Tretyakova, N. V. Petrov, K. G. Gulamov, S.Z. Nasyrov, N. G. Peresadko, E. S. Basova, S.A. Krasnov, Bekhzod S Yuldashev, S. P. Kharlamov, K. Söderström, Janka Vrlakova, S. K. Tuli, N. A. Salmanova, A. Kravcakova, M. M. Chernyavsky, A. Dirner, M. Tothova, V. Singh, V. S. Navotny, U.I. Tuleeva, I.D. Ojha, V. V. Rusakova, T. P. Trofimova, G. I. Orlova, L. Just, Bhartendu K. Singh, Bo Jakobsson, B.P. Tursunov, S. Vokal, V. G. Larionova, and M. I. Adamovich
Subjects: Physics, Nuclear and High Energy Physics, Plane (geometry), Nuclear Theory, Hadron, Detector, Physics::Fluid Dynamics, Nuclear physics, Azimuth, Flow (mathematics), Emulsion, Nuclear fusion, Atomic physics, Nuclear Experiment, Nucleon
Abstract: Using emulsion detector the collective flow signals in inelastic interactions of 84Kr nuclei with Ag(Br) at 950 MeV/nucleon are studied. A transverse momentum analysis is performed to determine the reaction plane. The bounce-off of spectator fragments is observed. In azimuthal distributions relative to the reaction plane squeeze-out and side-splash of participants are seen.
Published: 1999

8. Multifractal analysis of particles produced in 197 Au, 32 S and 16 O induced interactions at high energies

Author: S.Z. Nasyrov, K. Söderström, A.K. Musaeva, Joakim Nystrand, D. C. Zhou, Andrei Gheata, J. J. Lord, A. M. Bakich, C.B. Yang, Vivek K. Gupta, S.A. Krasnov, J. Grote, L. N. Svechnikova, M. Roeper, Shiv K. Gupta, D. Skelding, J. T. Rhee, S. Lokanathan, I. Otterlund, S.Q. Feng, M. Tothova, C.G. Lee, R. Sethi, E. R. Ganssauge, S. I. Zhokhova, Dong-Hai Zhang, S. Dhamija, V.I. Skorobogatova, M. I. Tretyakova, V. A. Plyushchev, S. Vokal, V. Bradnova, K. G. Gulamov, V. Kumar, Y.X. Li, Paul Nilsson, P. Y. Zheng, D.M. Seliverstov, V. S. Bhatia, Z.R. Hu, L. S. Liu, V. G. Larionova, A. S. Gaitinov, A. Pavukova, B. B. Simonov, G.M. Chen, S. B. Luo, M. Karabova, U.I. Tuleeva, L. Liang, X. Cai, Madan M. Aggarwal, M. I. Adamovich, H. Q. Wang, W. Y. Qian, L.Z. Yu, Y. Lu, N. A. Salmanova, Y.L. Yu, F. A. Avetyan, F. G. Lepekhin, G. I. Orlova, Y. C. Kim, Shi-kun Wang, Janka Vrlakova, Maria Haiduc, Rashmi Raniwala, V. S. Navotny, A.M. Tawfik, Evert Anders Stenlund, O. V. Levitskaya, N. A. Marutyan, K. El Chenawi, A.M. Seitimbetov, S. K. Badyal, Z.G. Liu, K. B. Bhalla, N. K. Rao, Anju Bhasin, R. Amirikas, T. Wu, N. Saidkhanov, L. G. Sarkisova, Z. Q. Weng, V. I. Bubnov, S. P. Kharlamov, V. G. Bogdanov, Y.M. Qin, D. Felea, N. S. Lukicheva, V. V. Rusakova, Z.B. Yin, V. Vashisht, Alexander Kovalenko, T. P. Trofimova, S. Garpman, X.R. Wang, N. P. Andreeva, S. G. Gerassimov, N. G. Peresadko, E. S. Basova, I. S. Mittra, L. Just, Mihaela Gheata, C.I. Shakhova, L.S. Peak, E. K. Kanygina, Bo Jakobsson, V. R. Sarkisyan, M. M. Chernyavski, N. V. Petrov, L. P. Chernova, D. Hasegan, H. Liu, I. Y. Chasnikov, Y. A. Alexandrov, R. J. Wilkes, L. K. Mangotra, B. Singh, and W. Li
Subjects: Physics, Spectral representation, Fractal, Monte Carlo method, General Physics and Astronomy, Statistical analysis, Rapidity, Multifractal spectra, Multifractal system, Atomic physics, Statistical fluctuations, Molecular physics
Abstract: We analyse the multifractal structure of moments Gq in terms of a new variable X on data of 197Au, 32S and 16O induced interactions with emulsion nuclei and Monte Carlo generated samples. The dynamical properties of the produced particles are mapped onto multifractal spectra. We compare ln G in experimental data of 197Au, 32S and 16O with pure statistical fluctuations. It is shown that the stochasticity plays an important role for the G-moments.
Published: 1998

9. Critical behaviour in Au fragmentation at 10.7A GeV

Author: K. Söderström, P. Y. Zheng, L. K. Mangotra, K. G. Gulamov, R. Sethi, V. I. Bubnov, V. A. Plyushchev, S. Vokal, V. Kumar, Y.X. Li, Madan M. Aggarwal, V. S. Navotny, G.M. Chen, Joakim Nystrand, L. N. Svechnikova, L. P. Chernova, A.K. Musaeva, N. A. Salmanova, V. S. Bhatia, Anju Bhasin, N. Saidkhanov, C.I. Shakhova, L. S. Liu, V. G. Larionova, D. Skelding, J. T. Rhee, M. Tothova, E. R. Ganssauge, V. V. Rusakova, I. Y. Chasnikov, L. G. Sarkisova, C.B. Yang, Z. Q. Weng, Y. A. Alexandrov, Bo Jakobsson, Rashmi Raniwala, L. Karlsson, L.S. Peak, R. J. Wilkes, J. J. Lord, S.A. Krasnov, I. Manhas, V. R. Sarkisyan, J. Grote, N.A. Tawfik, Dong-Hai Zhang, M. I. Tretyakova, S.Z. Nasyrov, N. G. Peresadko, E. S. Basova, A.M. Seitimbetov, N. K. Rao, Janka Vrlakova, D. C. Zhou, A. S. Gaitinov, X. Cai, U.I. Tuleeva, F. A. Avetyan, A. M. Bakich, M. Roeper, Maria Haiduc, M. Karabova, M. M. Chernyavski, L. Just, H. Q. Wang, E. K. Kanygina, S. Garpman, M. I. Adamovich, X.R. Wang, W. Y. Qian, S. K. Badyal, Z.G. Liu, S. I. Zhokhova, Alexander Kovalenko, B. Singh, N. P. Andreeva, S. B. Luo, S. P. Kharlamov, T. P. Trofimova, Shi-kun Wang, V. G. Bogdanov, U. Henjes, S. G. Gerassimov, Y.M. Qin, N. S. Lukicheva, G. I. Orlova, Vivek K. Gupta, Shiv K. Gupta, K. B. Bhalla, S. Dhamija, R. Amirikas, Evert Anders Stenlund, N. A. Marutyan, S. Lokanathan, Y. Lu, V. Bradnova, and I. Otterlund
Subjects: Physics, Nuclear and High Energy Physics, Phase transition, education.field_of_study, Hadron, Population, Charge density, Supercritical fluid, Nuclear physics, Fragmentation (mass spectrometry), Nuclear fusion, Nuclear emulsion, Nuclear Experiment, education
Abstract: The complete charge distribution of products from Au nuclei fragmenting in nuclear emulsion at 10.7A GeV has been measured. Multiplicities of produced particles and particles associated with the target source are used to select peripheral and central events. A statistical analysis, based on event-by-event charge distributions, show that a population of subcritical, critical and supercritical events, i.e. a phase transition like behaviour, is observed among peripheral collisions.
Published: 1998

10. Nuclear effect in higher-dimensional factorial moment analysis of the $^{16}$ O-, $^{32}$ S- and $^{197}$ Au-Em interaction data at 200, 60 and 11 A GeV/c

Author: Madan M. Aggarwal, G. F. Xu, R. J. Wilkes, L. Liang, N. A. Salmanova, V. S. Navotny, O. V. Levitskaya, K. Söderström, D. Hasegan, K. El Chenawi, I. S. Mittra, Anju Bhasin, Mihaela Gheata, A. Pavukova, N. Saidkhanov, C.I. Shakhova, R. Sethi, S. B. Luo, V. A. Plyushchev, J. J. Lord, S. Vokal, J. Grote, S. K. Gupta, Y.X. Li, L.S. Peak, Joakim Nystrand, F.A. Avetian, A. S. Gaitinov, Z. Q. Weng, N. V. Petrov, L. Just, K. G. Gulamov, M. Tothova, V. Kumar, S. Garpman, Z.R. Hu, V. S. Bhatia, L. S. Liu, V. G. Larionova, A.M. Tawfik, M. Karabova, H. Q. Wang, S.Q. Feng, C.G. Lee, K. B. Bhalla, R. Amirikas, Y. Lu, Vivek K. Gupta, L. N. Svechnikova, W. Y. Qian, V. Bradnova, X.R. Wang, S. P. Kharlamov, E. K. Kanygina, Rashmi Raniwala, L.Z. Yu, L. P. Chernova, Paul Nilsson, V. Vashisht, V. G. Bogdanov, Maria Haiduc, U.I. Tuleeva, N. P. Andreeva, V.I. Skorobogatova, F. G. Lepekhin, Y.M. Qin, D. Felea, I. Otterlund, M. Roeper, A.M. Seitimbetov, G.M. Chen, V.R. Sarkisian, Alexander Kovalenko, Bo Jakobsson, Y. C. Kim, N. S. Lukicheva, N. K. Rao, M. I. Tretyakova, D.M. Seliverstov, V. I. Bubnov, T. P. Trofimova, S.G. Gerasimov, Y. Deng, Dong-Hai Zhang, P. Y. Zheng, V. V. Rusakova, Z.B. Yin, N. G. Peresadko, E. S. Basova, X. Cai, I. Y. Chasnikov, Y. A. Alexandrov, G. I. Orlova, L. G. Sarkisova, Janka Vrlakova, A.K. Musaeva, S. K. Badyal, Z.G. Liu, C.B. Yang, S. A. Krasnov, E. Stenlund, Bhartendu K. Singh, B. B. Simonov, S.Z. Nasyrov, L. K. Mangotra, D. Skelding, J. T. Rhee, S. I. Zhokhova, Y.L. Yu, S. Lokanathan, D. C. Zhou, Andrei Gheata, A. M. Bakich, E. R. Ganssauge, M. I. Adamovich, Shi-kun Wang, N.A. Marutian, S. Dhamija, and M. M. Chernyavsky
Subjects: Nuclear physics, Physics, Moment (mathematics), Particle physics, Angular distribution, Physics and Astronomy (miscellaneous), Nuclear Theory, Emulsion, Rapidity, Nuclear Experiment, Particle Physics - Phenomenology, Factorial moment
Abstract: The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ^{16}O-, ^{32}S- and ^{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions. The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ~{16}O-, ~{32}S- and ~{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions. The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ~{16}O-, ~{32}S- and ~{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions. The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ~{16}O-, ~{32}S- and ~{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions. The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ~{16}O-, ~{32}S- and ~{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions. The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ~{16}O-, ~{32}S- and ~{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions. The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ~{16}O-, ~{32}S- and ~{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions. The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ~{16}O-, ~{32}S- and ~{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions. The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ~{16}O-, ~{32}S- and ~{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions. The anomalous behavior of 2-dimensional factorial moment in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of ^{16}O-, ^{32}S- and ^{197}Au-Em interactions from EMU01 experiment. The correct value for the effective Hurst exponent in the analysis of higher-dimensional factorial moment is found to be greater than unity, showing clearly the existence of superposition effect in nucleus-nucleus collisions.
Published: 1997

11. Multifragmentation of Gold nuclei in the interactions with photoemulsion nuclei at 10.7 GeV/nucleon

Author: L. N. Svechnikova, M. Karabova, H. Q. Wang, W. Y. Qian, A.M. Tawfik, Madan M. Aggarwal, L.Z. Yu, V. S. Navotny, K. El Chenawi, Rashmi Raniwala, R. Sethi, L.S. Peak, K. G. Gulamov, V. Kumar, M. I. Tretyakova, M. Gheata, K. Söderström, S.Z. Nasyrov, L. K. Mangotra, Y.X. Li, E. Baklitskaya, A. Gheata, N. G. Peresadko, E. S. Basova, G. Z. Eligbaeva, X. Cai, D. C. Zhou, L. Just, S.Q. Feng, Anju Bhasin, N. Saidkhanov, A. M. Bakich, Bhartendu K. Singh, T. I. Shakhova, M. Roeper, I.Ya. Chasnikov, M. I. Adamovich, G.M. Chen, D. Felea, Joakim Nystrand, S. Dhamija, Dong-Hai Zhang, Z. Q. Weng, N. A. Salmanova, V.R. Sarkisian, D. Skelding, Yu.A. Aleksandrov, M. M. Chernyavsky, Shi-kun Wang, X.R. Wang, J. T. Rhee, M. Haiduc, V. A. Plyushchev, S. Vokal, S. P. Kharlamov, V. G. Bogdanov, U. Henjes, Z.V. Anzon, V.V. Uzhinsky, N. P. Andreeva, Y.M. Qin, K. B. Bhalla, V. S. Bhatia, L. S. Liu, V. G. Larionova, U.I. Tuleeva, R. Amirikas, E. R. Ganssauge, N. S. Lukicheva, N.A. Marutian, T. Svensson, N. V. Maslennikova, S. I. Zhokhova, A.M. Seitimbetov, N. K. Rao, V. Vashisht, S. K. Gupta, Y. Lu, A.Y. Mashkov, E. K. Kanygina, L. E. Eremenko, L. G. Sarkisova, F.A. Avetian, B.P. Tursunov, G. S. Kalyachkina, E. Stenlund, G. I. Orlova, Bo Jakobsson, I. Manhas, I. Otterlund, Alexander Kovalenko, M. Tothova, S.G. Gerasimov, N. V. Petrov, S. Garpman, T. P. Trofimova, Vivek K. Gupta, A. S. Gaitinov, V. I. Bubnov, Janka Vrlakova, A.K. Musaeva, D. Hasegan, V. V. Rusakova, Z.B. Yin, R. J. Wilkes, P. Y. Zheng, I. S. Mittra, S. Lokanathan, J. J. Lord, S. B. Luo, J. Grote, C.B. Yang, S. A. Krasnov, L. P. Chernova, V. Bradnova, S. K. Badyal, and Z.G. Liu
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Nuclear Theory, Charge density, Statistical model, Nuclear physics, Transverse momentum, Radial flow, Multiplicity (chemistry), Nuclear Experiment, Nucleon, Glauber, Excitation
Abstract: Recent results from the EMU-01/12 collaboration are presented for 10.7 GeV/nucleon gold nuclei interactions in emulsion. The distributions of "bound" charge ( Zbound ,Z b3), multiplicity distributions, fragment correlations and fluctua- tions are discussed. The data are compared to similar results obtained on the ALADIN setup at 600 MeV/nucleon. It is shown that multifragmentation of gold nuclei at high and in- termediate energies has common features. It is also obtained that the IMFs have reduced multiplicity at high energies. The data are analyzed within the scope of the statistical model of multifragmentation. This model requires the fol- lowing predetermined model ingredients: mass, charge and excitation energy of nuclear residuals. The simple estimation method of these characteristics is proposed in the framework of the Glauber approach. It is shown that the multifragmentation model reproduces qualitatively the present data. A dramatic discrepancy between the predicted and experimental yield of two charged fragments is found. The evolution of transverse momentum of fragments as a function of Zbound is presented. It is shown that the model greatly underpredicts the transverse momentum of fragments. It is interpreted as evidence of a strong radial flow of spectator fragments.
Published: 1997

12. Complex analysis of gold interactions with photoemulsion nuclei at 10.7 GeV/nucleon within the framework of cascade and FRITIOF models

Author: L. Just, N. G. Peresadko, E. S. Basova, E. Stenlund, T. H. Burnett, V. Bradnova, L. N. Svechnikova, N. A. Marutyan, A.Y. Mashkov, M. Ochs, Rashmi Raniwala, Alexander Kovalenko, T. P. Trofimova, N. S. Lukicheva, M. I. Tretyakova, M. Roeper, E. K. Kanygina, L. P. Chernova, K. Söderström, V. V. Uzhinskii, U.I. Tuleeva, A.M. Seitimbetov, E. R. Ganssauge, M. Karabova, Dong-Hai Zhang, S.Z. Nasyrov, L. K. Mangotra, N. K. Rao, I. S. Mittra, C.I. Shakhova, H. Q. Wang, R. J. Wilkes, K. G. Gulamov, V. Kumar, I. Y. Chasnikov, L.S. Peak, N. A. Salmanova, W. Y. Qian, Y. L. Xia, G. Z. Eligbaeva, Y. A. Alexandrov, N. V. Petrov, S. Garpman, X. Cai, Vivek K. Gupta, S. Dhamija, L. E. Eremenko, Joakim Nystrand, Madan M. Aggarwal, S. Lokanathan, Bo Jakobsson, M. Tothova, F. A. Avetyan, G. S. Kalyachkina, M. M. Chernyavski, Sudhir Raniwala, N. P. Andreeva, D. C. Zhou, V. R. Sarkisyan, S. Kachroo, C. Graf, S. G. Gerassimov, V. S. Navotny, A. M. Bakich, S. P. Kharlamov, A. S. Gaitinov, S. B. Luo, S. K. Gupta, G.S. Shabratova, V. G. Bogdanov, Z.V. Anzon, K. B. Bhalla, Y.M. Qin, M. I. Adamovich, D. Skelding, Anju Bhasin, N. Saidkhanov, B.P. Tursunov, Z. Q. Weng, R. Amirikas, E. Baklitskaya, S. Mokerjee, G. I. Orlova, J. J. Lord, L. G. Sarkisova, J. Grote, N. V. Maslennikova, V. I. Bubnov, S. I. Zhokhova, V. V. Rusakova, S. K. Badyal, Y. D. Li, C.B. Yang, S. A. Krasnov, S. Kitroo, Janka Vrlakova, I. Otterlund, V. A. Plyushchev, S. Vokal, Renu Arora, V. S. Bhatia, L. S. Liu, V. G. Larionova, and P. Y. Zheng
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Cascade, Nucleon
Published: 1997

13. Charged particle multiplicities, densities and fluctuations in Pb+Pb interactions at 158 A GeV

Author: S. I. Zhokhova, R. J. Wilkes, S.Z. Nasyrov, Y.L. Yu, B. B. Simonov, M. Karabova, D. Hasegan, H. Q. Wang, A.M. Tawfik, R. Sethi, F. G. Lepekhin, L. P. Chernova, S. K. Badyal, Z.G. Liu, Dong-Hai Zhang, Paul Nilsson, I. Otterlund, E. Stenlund, I. Y. Chasnikov, A. S. Gaitinov, Y.X. Li, Y. A. Alexandrov, V. Vashisht, N. V. Petrov, S. Garpman, L. Liang, D. Skelding, Y. C. Kim, E. R. Ganssauge, B. Singh, J. T. Rhee, E. K. Kanygina, V. I. Bubnov, L. K. Mangotra, M. I. Adamovich, W. Y. Qian, L.Z. Yu, Rashmi Raniwala, N. G. Peresadko, E. S. Basova, N. S. Lukicheva, Maria Haiduc, S. B. Luo, K. Söderström, V.I. Skorobogatova, Bo Jakobsson, M. I. Tretyakova, Alexander Kovalenko, Janka Vrlakova, A.K. Musaeva, G.M. Chen, Shi-kun Wang, K. G. Gulamov, S.Q. Feng, J. J. Lord, V. Kumar, J. Grote, L. N. Svechnikova, X. Cai, L. Just, A.M. Seitimbetov, Joakim Nystrand, V. V. Rusakova, T. P. Trofimova, C.G. Lee, Z.B. Yin, V. A. Plyushchev, S. Vokal, N. K. Rao, C.B. Yang, S.A. Krasnov, X.R. Wang, D. C. Zhou, S. Dhamija, V. S. Bhatia, Andrei Gheata, A. M. Bakich, N. A. Salmanova, L. S. Liu, V. G. Larionova, S. Lokanathan, N. P. Andreeva, M. Tothova, Anju Bhasin, N. Saidkhanov, S. G. Gerassimov, K. B. Bhalla, M. M. Chernyavski, Madan M. Aggarwal, Mihaela Gheata, R. Amirikas, Z. Q. Weng, L.S. Peak, P. Y. Zheng, U.I. Tuleeva, I. S. Mittra, S. P. Kharlamov, C.I. Shakhova, Y.M. Qin, D. Felea, V. S. Navotny, O. V. Levitskaya, K. El Chenawi, Z.R. Hu, Y. Lu, D.M. Seliverstov, G. I. Orlova, Vivek K. Gupta, Shiv K. Gupta, V. Bradnova, and M. Roeper
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Charged particle
Abstract: Results on charged particle multiplicities, densities and fluctuations from central Pb+Pb interactions at 158 A GeV are presented and discussed.
Published: 1997

14. Multiplicities in84Kr interactions in emulsion at 800–950 MeV/nucleon

Author: Bo Jakobsson, N. A. Salmanova, F. Schussler, S. P. Kharlamov, M. M. Chernyavsky, V. Singh, T. P. Trofimova, Bhartendu K. Singh, S.Z. Nasyrov, B.P. Tursunov, M. Karabova, A. Dirner, A. Pavukova, K. Söderström, K. G. Gulamov, V. S. Navotny, S. K. Tuli, M. I. Adamovich, S.A. Krasnov, M. I. Tretyakova, N. G. Peresadko, E. S. Basova, M. Tothova, U.I. Tuleeva, T. N. Maksimkina, I. D. Ohja, G. I. Orlova, Janka Vrlakova, L. Just, G. J. Musulmanbekov, B. S. Yuldashev, S. Vokál, V. G. Larionova, and N. V. Petrov
Subjects: Nuclear physics, Physics, Particle physics, Physics::Instrumentation and Detectors, Projectile, Cascade, Nuclear Theory, Detector, Emulsion, General Physics and Astronomy, Angular resolution, Nuclear Experiment, Nucleon
Abstract: Inelastic interactions induced by84Kr nuclei at 800–950 MeV/nucleon have been studied using a high angular resolution emulsion detector. Data on multiplicities of the produced particles, projectile and target fragments are shown. Comparisons with cascade calculations have been performed.
Published: 1996

15. On the production of slow particles in high energy heavy ion collisions

Author: L. P. Chernova, C.B. Yang, S.A. Krasnov, S. B. Luo, S. P. Kharlamov, D. H. Zhang, D. Skelding, B.P. Tursunov, V. G. Bogdanov, Z.V. Anzon, Y.M. Qin, I. Y. Chasnikov, Z. I. Solovieva, S. N. Shpilev, Y. A. Alexandrov, G. S. Kalyachkina, P. Y. Zheng, N. V. Petrov, L. N. Svechnikova, L. K. Mangotra, E. K. Kanygina, Alexander Kovalenko, V. I. Bubnov, M. I. Tretyakova, S. Mokerjee, L. Just, T. P. Trofimova, G. S. Shabratova, X. Cai, S. Kitroo, R. Raniwala, S. Kachroo, C. Graf, V. V. Rusakova, S.Z. Nasyrov, D. C. Zhou, K. Söderström, Janka Vrlakova, N. P. Andreeva, M. Karabova, R. J. Wilkes, H. Q. Wang, A. M. Bakich, J. Nystrand, I. S. Mittra, W. Y. Qian, S. G. Gerassimov, Anju Bhasin, Y. D. Li, M. Tothova, N. Saidkhanov, A. S. Gaitinov, S. Dhamija, Sudhir Raniwala, C.I. Shakhova, N. A. Salmanova, S. K. Gupta, Bo Jakobsson, S. Vokal, Y. L. Xia, V. A. Plyushchev, Z. Q. Weng, M. Roeper, L.S. Peak, V. R. Sarkisyan, J. J. Lord, V. S. Navotny, V. Bradnova, Renu Arora, N. V. Maslennikova, J. Grote, V. S. Bhatia, L. S. Liu, N. G. Peresadko, E. S. Basova, V. G. Larionova, S. I. Zhokhova, M. M. Chernyavski, S. Garpman, G. I. Orlova, M. J. Adamovich, D. A. Carshiev, U.I. Tuleeva, E. R. Ganssauge, A.M. Seitimbetov, T. H. Burnett, N. K. Rao, Evert Anders Stenlund, M. M. Aggarwal, N. A. Marutyan, A.Y. Mashkov, I. K. Bazarov, V. K. Gupta, K. G. Gulamov, V. Kumar, S. Lokanathan, G. Z. Eligbaeva, K. B. Bhalla, R. Amirikas, M. Ochs, I. Otterlund, L. E. Fremenko, N. S. Lukicheva, S. K. Badyal, F. A. Avetyan, and L. G. Sarkisova
Subjects: Physics, High energy, Physics and Astronomy (miscellaneous), Chemical physics, Yield (chemistry), Hadron, Heavy ion, Impact parameter, Atomic physics, Nuclear Experiment, Engineering (miscellaneous)
Abstract: The mechanism for producing slow, target associated particles in high energy heavy ion collisions is investigated. It is shown that the same mechanism which was proposed for hadron induced interactions is likely to appear also for heavy-ion reactions. The results indicate however a much weaker correlation between impact parameter and yield of slow particles.
Published: 1995

16. 28Si(32S) fragmentation at 3.7 A, 14.6 A and 200 A GeV

Author: M. I. Tretyakova, X. Cai, L. N. Svechnikova, B.P. Tursunov, L. E. Eremenko, G. S. Shabratova, Bo Jakobsson, M. Ochs, S. Vokal, R. Raniwala, Alexander Kovalenko, T. H. Burnett, R. J. Wilkes, V. R. Sarkisyan, S. K. Gupta, V. I. Bubnov, V. A. Plyushchev, Renu Arora, G. S. Kalyachkina, T. P. Trofimova, V. S. Bhatia, L. S. Liu, V. G. Larionova, C.B. Yang, S.Z. Nasyrov, V. K. Gupta, S. P. Kharlamov, L. P. Chernova, V. G. Bogdanov, V. Bradnova, V. V. Rusakova, Y. L. Xia, Z.V. Anzon, Y.M. Qin, N. P. Andreeva, D. H. Zhang, S. Kachroo, I. Y. Chasnikov, V. S. Navotny, S. G. Gerassimov, Anju Bhasin, N. Saidkhanov, Y. A. Alexandrov, N. V. Petrov, C. Graf, K. Söderström, D. Skelding, M. M. Chernyavski, N. G. Peresadko, E. S. Basova, M. Karabova, K. B. Bhalla, S. B. Luo, G. I. Orlova, K. G. Gulamov, V. Kumar, Z. Q. Weng, H. Q. Wang, R. Amirikas, F. A. Avetyan, S. Garpman, S. K. Badayal, S. Dhamia, J. Nystrand, N. S. Lukicheva, Z. I. Solovieva, D. C. Zhou, W. Y. Qian, S. N. Shpilev, S. A. Karsnov, I. S. Mittra, G. Z. Eligbaeva, A. S. Gaitinov, C.I. Shakhova, L. G. Sarkisova, A. M. Bakich, S. Mokerjee, E. K. Kanygina, S. Kitroo, A.M. Seitimbetov, N. K. Rao, Janka Vrlakova, S. Lokanathan, L.S. Peak, J. J. Lord, J. Grote, M. Tothova, M. I. Adamovich, Sudhir Raniwala, Evert Anders Stenlund, P. Y. Zheng, L. K. Mangotra, M. Roeper, E. R. Ganssauge, N. V. Maslennikova, S. I. Zhokhova, M. M. Aggarwal, N. A. Marutyan, A.Y. Mashkov, I. K. Bazarov, Y. D. Li, L. Just, N. A. Salmanova, D. A. Carshiev, U.I. Tuleeva, and I. Otterlund
Subjects: Nuclear reaction, Nuclear physics, Physics, Nuclear and High Energy Physics, Fragmentation (mass spectrometry), Astrophysics::High Energy Astrophysical Phenomena, Charge density, Nuclear fusion, High Energy Physics::Experiment, Spallation, Atomic physics, Nuclear Experiment
Abstract: The fragmentation topology of28Si at 3.7A GeV and 14.6A GeV and32S at 200A GeV in reactions with emulsion nuclei is presented. The fragmentation cross sections are very similar at all three energies. A statistical percolation model can qualitatively describe the data forZ≥ 6. The He production is underestimated and the 3 ≤Z ≤ 5 fragments overestimated by this model.
Published: 1995

17. Particle production in gold and lead induced interactions at AGS and SPS

Author: M. M. Aggarwal, N. A. Marutyan, A.Y. Mashkov, M. Karabova, N. A. Salmanova, H. Q. Wang, W. Y. Qian, M. Roeper, J. Nystrand, E. R. Ganssauge, F.A. Aveytan, T. H. Burnett, M Hajduk, V. I. Bubnov, I. S. Mittra, I. Otterlund, C.I. Shakhova, V. K. Gupta, M. I. Adamovich, L. Just, V. Bradnova, V. V. Rusakova, Y. L. Xia, M. Ochs, S. P. Kharlamov, J. J. Lord, S. Dhamija, V. G. Bogdanov, J. Grote, Z.V. Anzon, Y.M. Qin, V. S. Navotny, M. M. Chernyavski, G. S. Kalyachkina, A.M. Seitimbetov, Bhartendu K. Singh, M. I. Tretyakova, U.I. Tuleeva, R. Sethi, S. K. Gupta, V. A. Plyushchev, N. K. Rao, S. Kitroo, X. Cai, S. Lokanatan, L. G. Sarkisova, A. S. Gaitinov, Janka Vrlakova, A.K. Musaeva, P. Y. Zheng, D. C. Zhou, B.P. Tursunov, K. G. Gulamov, V. Kumar, V. S. Bhatia, Alexander Kovalenko, C.B. Yang, T. P. Trofimova, A. M. Bakich, G. Z. Eligbaeva, Anju Bhasin, N. Saidkhanov, L. S. Liu, V. G. Larionova, S. A. Krasnov, K. B. Bhalla, G. I. Orlova, L. N. Svechnikova, N. V. Maslennikova, M. Thotova, S. K. Badyal, E.K. Kanygian, R. Amirikas, G. S. Shabratova, Z. Q. Weng, R. Raniwala, N. S. Lukicheva, S. I. Zhokhova, Evert Anders Stenlund, S. B. Luo, S. N. Shpilev, R. J. Wilkes, L. E. Eremenko, Bo Jakobsson, S. Vokal, V. R. Sarkisyan, S.Z. Nasyrov, Z. I. Solovjeva, S. Kachroo, C. Graf, K. Söderström, L. P. Chernova, D. H. Zhang, I. Y. Chasnikov, Y. A. Alexandrov, N. V. Petrov, D. Skelding, L.S. Peak, N. G. Peresadko, E. S. Basova, S. Garpman, X.R. Wang, N. P. Andreeva, S. G. Gerassimov, and L. K. Mangotra
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Large Hadron Collider, Lead (geology), Physics::Instrumentation and Detectors, Nuclear Theory, Physics::Accelerator Physics, Particle, High Energy Physics::Experiment, Nuclear Experiment
Abstract: In this talk we will present some of the recent results from the experiments E863 and EMU12 using the BNL AGS Au-beam at 11.6 A GeV/c and the CERN SPS Pb-beam at 158 A GeV, respectively. Aspects on the particle production and on the target break-up will be discussed. The results are compared with model expectations. The lead data is here shown for the first time.
Published: 1995

18. Charged particle density distributions in Au induced interactions with emulsion nuclei at 10.7 A GeV

Author: E. R. Ganssauge, A.M. Seitimbetov, N. K. Rao, S. Lokanatan, A. S. Gaitinov, M. Tothova, L. E. Eremenko, P. Y. Zheng, I. Otterlund, M. I. Tretyakova, Bo Jakobsson, S. Vokal, N. V. Petrov, X. Cai, V. R. Sarkisyan, S.Z. Nasyrov, Z. I. Solovjeva, B.P. Tursunov, S. P. Kharlamov, M. Roeper, V. G. Bogdanov, Z.V. Anzon, R. J. Wilkes, Y.M. Qin, N. P. Andreeva, Evert Anders Stenlund, Anju Bhasin, N. Saidkhanov, N. V. Maslennikova, F. A. Avetyan, M. Karabova, D. Skelding, S. N. Shpilev, S. G. Gerassimov, H. Q. Wang, W. Y. Qian, S. Kitroo, M. Ochs, G. I. Orlova, Z. Q. Weng, Janka Vrlakova, M. I. Adamovich, G. S. Kalyachkina, D. A. Carshiev, U.I. Tuleeva, S. I. Zhokhova, C.B. Yang, S.A. Krasnov, Alexander Kovalenko, V. S. Navotny, L. P. Chernova, T. P. Trofimova, S. B. Luo, Y. L. Xia, N. G. Peresadko, E. S. Basova, D. H. Zhang, V. Bradnova, S. Garpman, N. S. Lukicheva, I. Y. Chasnikov, Y. A. Alexandrov, M. M. Chernyavski, S. K. Gupta, V. A. Plyushchev, L. G. Sarkisova, S. Kachroo, L. N. Svechnikova, C. Graf, Renu Arora, D. C. Zhou, K. Söderström, G. S. Shabratova, R. Raniwala, V. S. Bhatia, A. M. Bakich, L. S. Liu, V. G. Larionova, J. J. Lord, J. Grote, I. S. Mittra, C.I. Shakhova, L.S. Peak, S. K. Badyal, K. B. Bhalla, R. Amirikas, L. K. Mangotra, E. K. Kanygina, Y. D. Li, J. Nystrand, V. I. Bubnov, V. V. Rusakova, K. G. Gulamov, V. Kumar, G. Z. Eligbaeva, N. A. Salmanova, T. H. Burnett, V. K. Gupta, S. Dhamija, L. Just, M. M. Aggarwal, N. A. Marutyan, A.Y. Mashkov, I. K. Bazarov, T. Svensson, and S. Mokerjee
Subjects: Physics, Nuclear physics, Momentum, Nuclear and High Energy Physics, Pseudorapidity, Particle, Nuclear emulsion, Nuclear Experiment, Charged particle beam, Spectral line, Charged particle, Fermi Gamma-ray Space Telescope
Abstract: Charged particle pseudorapidity density distributions in Au induced reactions in nuclear emulsion at 10.7 A GeV have been measured. In peripheral events the shower particle distribution exhibits a two peak structure while in central collisions it has a Gaussian shape. The spectator protons appear in the second peak in the pseudorapidity spectra and exhibits a broader momentum distribution than expected from Fermi motion. The produced particle yield in central collisions is not substantially different from phenomenological descriptions based on data from O and S induced reactions.
Published: 1995

19. Helium production in 10.7 A GeV Au induced nucleus-nucleus collisions

Author: D. Skelding, L. K. Mangotra, R. J. Wilkes, M. I. Tretyakova, X. Cai, M. Ochs, J. J. Lord, D. C. Zhou, J. Grote, S. Kitroo, N. A. Salmanova, Janka Vrlakova, A. M. Bakich, B.P. Tursunov, L. E. Eremenko, I. S. Mittra, L. P. Chernova, Evert Anders Stenlund, Bo Jakobsson, M. Karabova, H. Q. Wang, S.Z. Nasyrov, Z. I. Solovjeva, S. Vokal, N. P. Andreeva, C.I. Shakhova, W. Y. Qian, V. R. Sarkisyan, S. Kachroo, D. H. Zhang, N. S. Lukicheva, S. P. Kharlamov, S. K. Badyal, C. Graf, S. G. Gerassimov, V. G. Bogdanov, Y. L. Xia, I. Y. Chasnikov, Z.V. Anzon, K. Söderström, E. R. Ganssauge, Y. A. Alexandrov, V. I. Bubnov, Y.M. Qin, N. V. Petrov, G. S. Kalyachkina, M. I. Adamovich, L. Just, M. Tothova, V. V. Rusakova, F. A. Avetyan, Anju Bhasin, M. Roeper, M. M. Chernyavski, N. Saidkhanov, L.S. Peak, S. B. Luo, A. S. Gaitinov, N. G. Peresadko, E. S. Basova, K. B. Bhalla, R. Amirikas, I. Otterlund, Z. Q. Weng, L. G. Sarkisova, S. Garpman, S. N. Shpilev, Alexander Kovalenko, D. A. Carshiev, M. M. Aggarwal, U.I. Tuleeva, Sudhir Raniwala, N. V. Maslennikova, T. P. Trofimova, N. A. Marutyan, A.Y. Mashkov, I. K. Bazarov, E. K. Kanygina, T. H. Burnett, S. I. Zhokhova, S. Dhamija, V. K. Gupta, Y. D. Li, K. G. Gulamov, V. Kumar, P. Y. Zheng, G. Z. Eligbaeva, A.M. Seitimbetov, N. K. Rao, S. Lokanatan, J. Nystrand, V. Bradnova, S. Mokerjee, L. N. Svechnikova, G. S. Shabratova, R. Raniwala, V. S. Navotny, G. I. Orlova, S. K. Gupta, V. A. Plyushchev, Renu Arora, V. S. Bhatia, L. S. Liu, V. G. Larionova, C.B. Yang, and S.A. Krasnov
Subjects: Physics, Nuclear and High Energy Physics, chemistry.chemical_element, Nuclear physics, medicine.anatomical_structure, chemistry, Fragmentation (mass spectrometry), Total angular momentum quantum number, Angular momentum of light, Transverse momentum, medicine, Atomic physics, Nuclear Experiment, Nucleus, Helium
Abstract: Angular distributions of projectile-associated He fragments from Au induced reactions in nuclear emulsions at 10.7 A GeV have been measured with a precision of ±0.1 mrad. Two emission components are indubitably appearing, one representing fragmentation of a fermionic system while the other one exhibits large transverse momentum transfer. Possible explanations for the latter component are discussed.
Published: 1994

20. Rapidity density distributions and their fluctuations in violent Au-induced nuclear interactions at 11.6 A GeV/c

Author: Evert Anders Stenlund, M. I. Adamovich, M. I. Tretyakova, M. M. Aggarwal, N. A. Marutyan, Y. L. Xia, I. K. Bazanov, X. Cai, S. Lokanathan, D. Skelding, S. N. Shpilev, R. J. Wilkes, L. N. Svechnikova, N. G. Peresadko, E. S. Basova, L. K. Mangotra, S. Garpman, K. D. Tolstov, G. S. Shabratova, R. Raniwala, Y. D. Li, B.P. Tursunov, L. G. Sarkisova, L. Just, M. Tothova, E. K. Kanygina, D. C. Zhou, Sudhir Raniwala, A. S. Gaitinov, V. I. Bubnov, L. P. Chernova, S. P. Kharlamov, S. Mookerjee, Z. I. Solovjeva, S. B. Luo, G. F. Xu, T. P. Trofimova, V. G. Bogdanov, Z.V. Anzon, Y.M. Qin, V. S. Navotny, I. F. Chasnikov, M. Ochs, E. R. Ganssauge, T. I. Shakhova, D. H. Zhang, M. M. Chernyavsky, V. N. Lepetan, I. S. Mittra, Anju Bhasin, N. Saidkhanov, E. L. Surin, L. E. Eremenko, N. K. Rao, Y. A. Alexandrov, Bo Jakobsson, G. I. Orlova, N. V. Petrov, S. Vokal, P. Y. Zheng, V. R. Sarkisyan, Z. Q. Weng, J. J. Lord, S. K. Badyal, N. V. Maslennikova, J. Nystrand, H. S. Palsania, F. A. Avetyan, N. P. Andreeva, S. H. Nasyrov, J. Grote, S. I. Zhokhova, S. G. Gerassimov, T. Koss, S. K. Gupta, V. A. Plyushchev, Renu Arora, S. Kachroo, M. Karabova, D. A. Qarshiev, M. Roeper, H. Q. Wang, V. S. Bhatia, L. S. Liu, K. Söderström, V. G. Larionova, W. Y. Qian, T. H. Burnett, T. N. Maksimkina, I. Otterlund, G. S. Kalyachkina, V. K. Gupta, K. G. Gulamov, V. Kumar, C.B. Yang, S. A. Krasnov, G. Z. Eligbaeva, P. Lal, K. B. Bhalla, N. S. Lukicheva, D. A. Carshiev, U.I. Tuleeva, N. A. Salmanova, S. Kitroo, and Janka Vrlakova
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, SIMPLE (dark matter experiment), Particle physics, Density distribution, Nuclear Theory, Extrapolation, Rapidity, Nuclear Experiment, Charged particle
Abstract: The first rapidity density distributions from relativistic collisions between truly heavy nuclei are presented. The distributions are compared with expectations from a linear extrapolation of results obtained from collisions with lighter nuclei. Fluctuations are essentially described by a simple scenario with stochastic emission.
Published: 1994

21. Correlations in inelastic collisions of relativistic nuclei with emulsion at (4.1–4.5) A GeV/c

Author: V. A. Plyushchev, G. I. Orlova, D. M. Semverstov, V. G. Bogdanov, M.I. Tretyakova, S. D. Bogdanov, S. I. Solvieva, V. F. Kosmach, B. B. Simonov, V.A. Antonchik, M. T. Ghoniem, S. P. Kharlamov, K. D. Tolstov, S. S. Ramadan, N. N. Abdel-Allah, S. A. Keasnov, S. Vokál, M. T. Hussein, V. G. Larionova, A. El-Naghy, and N. M. Sadek
Subjects: Azimuth, Physics, Nuclear reaction, Nuclear physics, Correlation function, Plane (geometry), media_common.quotation_subject, Inelastic collision, Rapidity, Impact parameter, Nuclear Experiment, Asymmetry, media_common
Abstract: We present a systematic study and statistically significant results of different types of correlations, in angles, rapidities and rapidity intervals, between various charged secondary particles produced in inelastic interactions of relativistic nuclei with emulsion at (4.1–4.5) A GeV/c. All types of particles are found to be emitted asymmetrically in the azimuthal plane. This asymmetry increases with the decrease of impact parameter. The two-particle correlation function is found to be positive except in the extreme projectile fragmentation region. Particles from different kinematical regions are emitted back-to-back in the azimuthal plane. A multiparticle correlation is observed between created particles as well as target fragments. This assumes production of clusters. These clusters seem to be formed during the decolouring process. Investigations are being carried out to reveal the characteristics of these clusters.
Published: 1994

22. Fragmentation of $^7$Li Relativistic Nuclei on a Proton into the $^3$H+$^4$He Channel

Author: V. G. Larionova, N. G. Peresadko, E. I. Tamm, L. N. Shesterkina, S. Gerasimov, Alexander Malakhov, V. A. Dronov, Yu.A. Alexandrov, S. P. Kharlamov, A. V. Pisetskaya, and V. N. Fetisov
Subjects: Physics, Nuclear and High Energy Physics, Proton, Nuclear Theory, FOS: Physical sciences, Atomic and Molecular Physics, and Optics, Dissociation (psychology), law.invention, Nuclear physics, Momentum, Cross section (physics), Fragmentation (mass spectrometry), law, Transverse momentum, medicine, Physics::Accelerator Physics, Synchrophasotron, medicine.symptom, Nuclear Experiment (nucl-ex), Nucleon, Nuclear Experiment
Abstract: In a track nuclear photoemulsion exposed to a beamof $^7$Li nuclei accelerated to a momentum of 3 GeV/$c$ per nucleon at the synchrophasotron of the Joint Institute for Nuclear Research (JINR, Dubna), 13 events in which $^7$Li nuclei interacting with protons break up into $^3$H and $^4$He fragments were detected among 3730 inelastic-interaction events. For this fragmentation channel, the cross section was found to be $8\pm2$ mb. The average value of the fragment total transverse momentum was $214\pm5$ MeV/$c$. This value exceedsmarkedly the average value of the transverse-momentumtransfer in the coherent dissociation of $^7$Li nuclei on track-emulsion nuclei ($166\pm5$ MeV/$c$). The recoil-proton transverse momentum was on average 98% of the total proton momentum. The longitudinal-momentum distribution of protons was characterized by a variance of 16 MeV/$c$ and a mean value of $37\pm2$ MeV/$c$., Comment: ISSN 1063-7788
Published: 2011
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23. Systematic investigation of scaled factorial cumulant moments for nucleus-nucleus interactions

Author: G. Z. Eligbaeva, H. S. Palsania, B.P. Tursunov, M. M. Chernyavski, T. H. Burnett, N. K. Rao, G. S. Kalyachkina, V. K. Gupta, S. Kachroo, D. Skelding, K. Söderström, J. Nystrand, J. T. Rhee, Z. O. Weng, Z. V. Anson, L. P. Chernova, L. G. Sarkisova, N. A. Salmanova, L. E. Eremenko, T. P. Trofimova, L. N. Svechnikova, H. Huang, V. I. Bubnov, S. Mookerjee, E. R. Ganssauge, D. H. Zhang, G. I. Orlova, M. Karabova, H. Q. Wang, L. K. Mangotra, K. B. Bhalla, I. S. Mittra, Anju Bhasin, N. Saidkhanov, H. H. Heckman, Sudhir Raniwala, S. Vokal, W. Y. Qian, G. S. Shabratova, R. Raniwala, B. Jacobsson, V. M. Rappoport, Y. A. Alexandrov, S.Z. Nasyrov, B. Judek, N. S. Lukicheva, N. V. Petrov, Z. I. Solovieva, N. G. Peresadko, E. S. Basova, V. R. Sarkisyan, S. Garpman, D. C. Zhou, S. A. Krasnov, K. D. Tolstov, F. A. Avetyan, P. Y. Zheng, A. S. Gaitinov, T. I. Shakhova, J. J. Lord, S. K. Gupta, S. K. Badyal, D. A. Carshiev, U.I. Tuleeva, J. Grote, T. Koss, G. F. Xu, I. Otterlund, I. Y. Chasnicov, M. I. Adamovich, S. P. Kharlamov, N. P. Andreeva, Renu Arora, V. G. Bogdanov, V. N. Lepetan, S. G. Gerassimov, S. Kitroo, Y.M. Qin, V. S. Bhatia, L. S. Liu, V. G. Larionova, M. I. Tretyakova, V. S. Navotny, J. Wilkes, X. Cai, E. K. Kanygina, S. I. Zhochova, E. L. Surin, S. Lokanathan, N. V. Maslennikova, V. A. Plyuschev, Evert Anders Stenlund, S. N. Shpilev, S. B. Luo, M. M. Aggarwal, N. A. Marutyan, I. K. Bazarov, P. Lal, J. C. Zhou, K. G. Gulamov, and V. Kumar
Subjects: Nuclear reaction, Physics, Factorial, Pseudorapidity, Inverse, High Energy Physics::Experiment, Multiplicity (mathematics), Statistical physics, Nuclear Experiment, Particle density, Cumulant, Bin
Abstract: We use scaled factorial cumulant moments to analyze pseudorapidity fluctuations in nucleus-nucleus collisions. This approach is similar to the method of scaled factorial moments except that it removes the effects of lower-order correlations upon a given moment. Significant second-order cumulants and cumulant indices (slopes with respect to bin size) are found for all of the interactions studied. These indices are found to have an inverse dependence upon average pseudorapidity particle density.
Published: 1993

24. STUDY OF ANGULAR DISTRIBUTION OF HELIUM PROJECTILE FRAGMENTS IN INTERACTIONS OF 200 A GeV 32S IONS WITH EMULSION NUCLEI

Author: S. P. Kharlamov, K. D. Tolstov, D. C. Zhou, V. G. Bogdanov, G. S. Kalyachkina, Z.V. Anzon, Y.M. Qin, M. I. Adamovich, N. A. Salmanova, S. B. Luo, E. R. Ganssauge, Anju Bhasin, N. Saidkhanov, S. K. Gupta, R. J. Wilkes, V. A. Plyushchev, S. Kachroo, P. Lal, N. G. Peresadko, E. S. Basova, Y. L. Xia, S. K. Badyal, M. Tothova, Z. Q. Weng, Sudhir Raniwala, H. H. Heckman, M. Karabova, T. H. Burnett, D. A. Qarshiev, H. Q. Wang, J. Nystrand, K. Söderström, M. M. Chernyavsky, Evert Anders Stenlund, Renu Arora, V. S. Bhatia, W. Y. Qian, S. Garpman, M. I. Tretyakova, E. L. Surin, L. S. Liu, V. G. Larionova, I. Otterlund, M. M. Aggarwal, V. K. Gupta, L. P. Chernova, P. Y. Zheng, N. A. Marutyan, D. Skelding, L. S. Lukicheva, Gautam Kaul, X. Cai, L. K. Mangotra, K. G. Gulamov, V. Kumar, J. J. Lord, L. Just, S. N. Shpilev, A. S. Gaitinov, H. Nasrulaeva, T. N. Maksimkina, J. Grote, V. I. Bubnov, S. Mookerjee, D. H. Zhang, S. Lokanathan, G. Z. Eligbaeva, N. P. Andreeva, B. Judek, G. I. Orlova, I. S. Mittra, S. G. Gerassimov, H. Huang, I. Y. Chasnikov, H. S. Palsania, S. Kulikova, Y. A. Alexandrov, L. G. Sarkisova, S. Kitroo, N. V. Petrov, Z. I. Solovjeva, U.I. Tuleeva, S. H. Nasyrov, N. K. Rao, T. I. Shakhova, T. P. Trofimova, F. A. Avetyan, N. V. Maslennikova, S.A. Krasnov, S. I. Zhokhova, L. N. Svechnikova, E. K. Kanygina, L. E. Eremenko, Bo Jakobsson, S. Vokal, V. R. Sarkisyan, G. S. Shabratova, R. Raniwala, G. F. Xu, V. N. Lepetan, J. T. Rhee, V. M. Rappoport, V. S. Navotny, and K. B. Bhalla
Subjects: Physics, Nuclear and High Energy Physics, Projectile, General Physics and Astronomy, chemistry.chemical_element, Astronomy and Astrophysics, Breakup, Ion, Nuclear physics, Momentum, chemistry, Stack (abstract data type), Emulsion, Atomic physics, Nuclear Experiment, Helium, Excitation
Abstract: This paper presents data on the emission of helium fragments due to break up of 200 A GeV 32S ions in collision with emulsion nuclei. A total of 499 minimum bias events have been studied in an emulsion stack and 97 events in emulsion chambers. Emission angles of He fragments have been measured with high precision. This data has been compared with data of breakup of heavier as well as lighter projectiles and we observe that the value of the momentum spread, σ(p), increases with increasing projectile mass. The bulk part of the helium emission is consistent with a single source for helium fragments with an average excitation energy of (9.1±0.9) MeV. A tail of a few (
Published: 1993

25. Clustering in light nuclei in fragmentation above 1 A GeV

Author: N. P. Andreeva, D. A. Artemenkov, V. Bradnova, M. M. Chernyavsky, A. Sh. Gaitinov, N. A. Kachalova, S. P. Kharlamov, A. D. Kovalenko, M. Haiduc, S. G. Gerasimov, L. A. Goncharova, V. G. Larionova, A. I. Malakhov, A. A. Moiseenko, G. I. Orlova, N. G. Peresadko, N. G. Polukhina, P. A. Rukoyatkin, V. V. Rusakova, V. R. Sarkisyan, T. V. Shchedrina, E. Stan, R. Stanoeva, I. Tsakov, S. Vokál, A. Vokálová, P. I. Zarubin, and I. G. Zarubina
Published: 2010

26. Local particle densities and global multiplicities in central heavy ion interactions at 3.7, 14.6, 60 and 200A GeV

Author: V. I. Bubnov, L. P. Chernova, S. Mookerjee, L. N. Svechnikova, V. M. Rappoport, D. H. Zhang, Z. I. Solovjeva, I. Y. Chasnikov, S. N. Shpilev, G. S. Shabratova, Y. A. Alexandrov, R. Raniwala, N. V. Petrov, Y. L. Xia, L. E. Eremenko, F. A. Avetyan, N. G. Peresadko, E. S. Basova, Bo Jakobsson, S. K. Gupta, M. M. Chernyavsky, S. Kachroo, K. D. Tolstov, S. Garpman, J. T. Rhee, S. Vokal, V. R. Sarkisyan, T. I. Shakhova, K. Söderström, M. I. Adamovich, S. Lokanathan, S. P. Kharlamov, E. L. Surin, V. G. Bogdanov, Gautam Kaul, Y.M. Qin, A. S. Gaitinov, J. J. Lord, D. Skelding, K. G. Gulamov, G. F. Xu, L. K. Mangotra, J. Grote, V. Kumar, B. Judek, S. K. Badyal, N. S. Lukicheva, Anju Bhasin, N. Saidkhanov, T. P. Trofimova, S. B. Luo, V. A. Plyushchev, V. S. Navotny, M. Karabova, M. M. Aggarwal, H. Huang, N. P. Andreeva, V. N. Lepetan, D. A. Qarshiev, H. Q. Wang, N. A. Marutyan, G. Z. Eligbaeva, Renu Arora, V. S. Bhatia, L. S. Liu, V. G. Larionova, W. Y. Qian, S. G. Gerassimov, Z. Q. Weng, I. S. Mittra, H. Nasrulaeva, T. N. Maksimkina, G. I. Orlova, S. Kulikova, Evert Anders Stenlund, G. S. Kalyachkina, S. I. Zhochova, M. I. Tretyakova, X. Cai, K. B. Bhalla, J. Nystrand, P. Lal, E. K. Kanygina, L. G. Sarkisova, E. R. Ganssauge, T. H. Burnett, S. A. Krasnov, V. K. Gupta, D. C. Zhou, S. Kitroo, H. H. Heckman, I. Otterlund, H. S. Palsania, N. V. Maslennikova, S. H. Nasyrov, M. Tothova, Sudhir Raniwala, N. K. Rao, P. Y. Zheng, N. A. Salmanova, L. Just, Z. V. Anson, U.I. Tuleeva, and R. J. Wilkes
Subjects: Physics, Nuclear physics, Particle physics, Physics and Astronomy (miscellaneous), Pseudorapidity, Inverse, Multiplicity (mathematics), Rapidity, Elementary particle, Quantum field theory, Particle density, Centrality, Engineering (miscellaneous)
Abstract: The energy and centrality dependence of local particle pseudorapidity densities as well as validity of various parametrizations of the distributions are examined. The dispersion, σ, of the rapidity density distribution of produced particles varies slowly with centrality and is 0.80, 0.98, 1.21 and 1.41 for central interactions at 3.7, 14.6, 60 and 200A GeV incident energy, respectively, σ is found to be independent of the size of the interacting system at fixed energy. A novel way of representing the window dependence of the multiplicity as normalized variance versus inverse average multiplicity is outlined.
Published: 1992

27. Rapidity density distributions inO16,Si28,S32,Au197, andPb208induced heavy-ion interactions at 4A–200AGeV

Author: S. K. Badyal, N. Saidkhanov, V. M. Rappoport, S. A. Krasnov, S. P. Kharlamov, V. G. Bogdanov, S. Kachroo, N. A. Marutyan, J. Grote, H. Q. Wang, L. N. Svechnikova, S. Lokanathan, V. I. Bubnov, K. G. Gulamov, N. A. Salmanova, V. R. Sarkisyan, V. K. Gupta, I. S. Mittra, L. Just, N. K. Rao, Y. M. Qin, E. R. Ganssauge, W. Y. Qian, Z. V. Anzon, Bo Jakobsson, J. Lord, H. H. Heckman, D. C. Zhou, S. Vokal, M. Karabova, B. Judek, S. Kitroo, D. H. Zhang, S. Mookerjee, K. Söderström, S. N. Shpilev, E. L. Surin, K. D. Tolstov, M. M. Chernyavsky, L. K. Mangotra, L. E. Eremenko, Y. A. Alexandrov, Y. L. Xia, V. A. Plyushchev, P. Y. Zheng, N. P. Andreeva, E. Stenlund, S. Raniwala, G. I. Orlova, N. V. Petrov, S. B. Luo, V. N. Lepetan, M. Tothova, G. Z. Eligbaeva, D. A. Qarshiev, T. I. Shakhova, S. K. Gupta, H. Huang, D. Skelding, T. N. Maksimkina, G. L. Kaul, N. G. Peresadko, U. Tuleeva, L. S. Liu, I. Otterlund, T. P. Trofimova, K. B. Bhalla, N. S. Lukicheva, E. K. Kanygina, L. P. Chernova, V. Kumar, T. H. Burnett, S. Kulikova, S. Garpman, M. I. Tretyakova, N. V. Maslennikova, X. Cai, L. G. Sarkisova, J. Nystrand, I. Y. Chasnikov, M. M. Aggarwal, H. Nasrulaeva, G. F. Xu, S. I. Zhokhova, G. S. Shabratova, R. J. Wilkes, V. G. Larionova, F. A. Avetyan, Z. I. Solovjeva, G. S. Kalyachkina, R. Arora, M. I. Adamovich, S. G. Gerassimov, R. Raniwala, H. S. Palsania, A. S. Gaitinov, P. Lal, Z. Q. Weng, J. T. Rhee, V. S. Bhatia, V. S. Navotny, A. Bhasin, and S. H. Nasyrov
Subjects: Nuclear physics, Physics, Range (particle radiation), General Physics and Astronomy, Heavy ion, Rapidity, Charged particle
Abstract: The mass, energy, and centrality dependence of rapidity density distributions of relativistic, charged particles, produced in heavy-ion interactions in the energy range 4A–200A GeV, are investigated. The results indicate that the rapidity density distributions show systematic variations, which are used to predict distributions for Au+Au and Pb+Pb interactions in a model-independent way.
Published: 1992

28. Review of recent results on particle production from EMU01

Author: V. I. Bubnov, D. Skelding, L. P. Chernova, V. G. Bogdanov, S. Lokanathan, G. S. Shabratova, F. A. Avetyan, S. L. Kachroo, I. Y. Chasnicov, H. Huang, G. F. Xu, J. T. Rhee, Madan M. Aggarwal, D. C. Zhou, F. G. Kadyrov, I. S. Mittra, H. Nasrulaeva, R. J. Wilkes, P. Lal, K. D. Tolstov, N. G. Peresadko, V. S. Navotny, S. Raniwala, Gautam Kaul, V. S. Bhatia, T. I. Shakhova, U. Tuleeva, L. G. Sarkisova, P. Y. Zheng, J. J. Lord, H. H. Heckman, H. Palsania, J. Grote, X. Cai, V. M. Rappoport, V. R. Sarkisyan, S. B. Luo, S. H. Nasyrov, K. G. Gulamov, N. Saidkhanov, J. C. Zhou, S. C. Strausz, V. N. Lepetan, S. K. Gupta, M. I. Tretyakova, T. Koss, E. R. Ganssauge, W. Y. Qian, S. G. Gerassimov, Y. A. Alexandrov, N. A. Marutyan, Z. V. Anzon, E. Stenlund, N. V. Petrov, N. V. Maslennikova, M. M. Chernyavski, B. Judek, K. B. Bhalla, V. A. Plyuschev, N. K. Rao, R. Raniwala, Anju Bhasin, G. S. Kalyachkina, T. H. Burnett, V. G. Larionova, R. Arora, B. Jacobsson, A. S. Gaitinov, M. I. Adamovich, K. Soderstrom, S. Vokal, E. K. Kanygina, J. F. Sun, T. P. Trofimova, L. K. Mangotra, D. H. Zhang, S. Mookerjee, H. Q. Wang, M. Karabova, N. P. Andreeva, Z. O. Weng, G. Z. Eligbaeva, L. E. Eremenko, I. Otterlund, N. A. Salmanova, S. I. Zhokova, S. P. Kharlamov, S. Garpman, L. S. Liu, E. Basova, N. S. Lukicheva, V. Kumar, G. I. Orlova, S. A. Krasnov, S. K. Badyal, L. N. Svechnikova, and Z. I. Solovieva
Subjects: Physics, Nuclear and High Energy Physics, Superposition principle, Distribution (mathematics), Monte Carlo method, Detector, Particle, Statistical physics, Nuclear Experiment, Beam (structure), Charged particle, Factorial moment, Computational physics
Abstract: The EMU01 Collaboration has employed emulsion chamber and pellicle detectors to accumulate a large database of heavy nucleus interactions. Samples include both minimum bias and central collisions, analyzed in a uniform manner to extract multiplicities and angular distributions of charged particles and nuclear fragments. We find that the main features of these distribution are well represented by geometrical superposition models. A unique feature of EMU01 is the use of emulsion chambers with thin foil targets to observe produced particle angular distributions with exceptionally high precision, permitting extension of fluctuations and correlations analyses beyond the resolution limits imposed by other experimental techniques. The data are generally well reproduced by interaction simulations such as FRITIOF (the Lund monte carlo for nuclear collisons) which include only conventional physics effects. However, the analysis of fluctuations and correlations via factorial moment and cumulant techniques yields some suggestive results which require further investigation, both by continued analysis of existing data and from Au and Pb beam exposures scheduled for the next few years.
Published: 1992

29. A systematic study of the energy independent behaviour of the fragmentation regions in16O-Em interactions from 3.7 to 200A GeV

Author: H. O. Wang, V. I. Bubnov, S. Mookerjee, Z. V. Anson, Anju Bhasin, N. Saidkhanov, K. Söderström, M. Karabova, W. Y. Qian, B. Judek, N. S. Lukicheva, S. Kachroo, N. G. Peresadko, E. S. Basova, M. I. Adamovich, R. J. Wilkes, G. S. Kalyachkina, Gautam Kaul, N. A. Marutyan, D. Skelding, H. Nasrulaeva, P. Lal, U.I. Tuleeva, G. I. Orlova, G. F. Xu, Sudhir Raniwala, S. Lokanathan, N. A. Salmanova, V. M. Rappoport, G.S. Shabratova, S. B. Luo, A. S. Gaitinov, T. P. Trofimova, V. N. Lepetan, L. P. Chernova, J. J. Lord, P. Y. Zheng, J. Grote, T. Koss, D. C. Zhou, S. Garpman, K. D. Tolstov, I. Y. Chasnikov, I. Otterlund, Y. A. Alexandrov, N. P. Andreeva, E. R. Ganssauge, N. V. Petrov, S. G. Gerassimov, M. M. Chernyavski, F. A. Avetyan, S. K. Gupta, I. S. Mittra, V. A. Plyushchev, Rashmi Raniwala, F. G. Kadyrov, Z. I. Solovjeva, T. I. Shakhova, S. Vokal, J. Ravina, Renu Arora, Y. Z. Liu, M. I. Tretyakova, V. S. Bhatia, L. S. Liu, V. G. Larionova, X. Cai, N. K. Rao, Madan M. Aggarwal, K. B. Bhalla, V. S. Navotny, S. P. Kharlamov, V. G. Bogdanov, Z. O. Weng, L. G. Sarkisova, N. V. Maslennikova, E. K. Kanygina, L. E. Eremenko, Bo Jakobsson, V. R. Sarkisyan, S. K. Badyal, H. S. Palsania, S. H. Nasyrov, S. C. Strausz, K. G. Gulamov, V. Kumar, S. A. Krasnov, L. K. Mangotra, G. Z. Eligbaeva, Evert Anders Stenlund, T. H. Burnett, Dong-Hai Zhang, S. I. Zhochova, H. H. Heckman, L. N. Svechnikova, and J. T. Rhee
Subjects: Physics, Physics and Astronomy (miscellaneous), Projectile, Limiting, Statistical fluctuations, law.invention, Nuclear physics, Fragmentation (mass spectrometry), law, Intermittency, Incident energy, Multiplicity (chemistry), Nuclear Experiment, Engineering (miscellaneous), Scaling
Abstract: The scaling behaviour in the fragmentation regions is investigated for16O-Em interactions from 3.7 to 200A GeV. It is found that in both the projectile- and the target-fragmentation regions, the multiplicity and pseudo-rapidity distributions as well as the two-particle pseudo-rapidity correlations are independent of incident energy. The intermittency indices at 14.6, 60 and 200A GeV are the same within the experimental errors, indicating that the limiting fragmentation hypothesis works with regard to dynamical as well as statistical fluctuations.
Published: 1992

30. On the systematic behaviour of the intermittency-indices in nuclear interactions

Author: K. G. Gulamov, V. Kumar, V. M. Rappoport, Vivek K. Gupta, B. Dressel, K. D. Tolstov, K. Söderström, H. O. Wang, Madan M. Aggarwal, F. G. Kadyrov, G. Z. Eligbaeva, L. P. Chernova, Z. I. Solovjeva, G. F. Xu, B. Judek, J. C. Zhou, N. S. Lukicheva, N. A. Salmanova, T. I. Shakhova, Anju Bhasin, D. H. Zhang, I. Y. Chasnikov, Y. A. Alexandrov, N. V. Petrov, F. A. Avetyan, D. C. Zhou, U.I. Tuleeva, V. S. Navotny, T. P. Trofimova, V. N. Lepetan, N. A. Marutyan, E. K. Kanygina, E. M. Friedlander, Sudhir Raniwala, L. E. Eremenko, W. Schulz, A. S. Gaitinov, N. Saidkhanov, H. H. Heckman, Z. Q. Weng, Evert Anders Stenlund, T. H. Burnett, Manjit Kaur, S. A. Krasnov, D. Skelding, J. T. Rhee, S. K. Badyal, L. N. Svechnikova, N. G. Peresadko, E. S. Basova, L. G. Sarkisova, Gautam Kaul, S. Garpman, P. J. Lindstrom, P. Lal, V. I. Bubnov, S. Mookerjee, G.S. Shabratova, S. Kachroo, S. K. Gupta, N. V. Maslennikova, I. S. Mittra, Bo Jakobsson, V. A. Plyushchev, S. Vokal, H. Nasrulaeva, G. I. Orlova, M. I. Tretyakova, V. R. Sarkisyan, P. Y. Zheng, Renu Arora, M. I. Adamovich, H. Huang, S. Lokanathan, N. P. Andreeva, V. S. Bhatia, L. S. Liu, V. G. Larionova, M. M. Chernyavski, R. J. Wilkes, S. G. Gerassimov, X. Cai, S. C. Strausz, L. K. Mangotra, S. I. Zhochova, K. B. Bhalla, S. B. Luo, Rashmi Raniwala, I. Otterlund, H. S. Palsania, B. Singh, J. F. Sun, N. K. Rao, S. H. Nasyrov, Z. V. Anson, C. Mueller, J. J. Lord, E. R. Ganssauge, J. Grote, S. P. Kharlamov, T. Koss, V. G. Bogdanov, M. Karabova, W. Y. Qian, and G. S. Kalyachkina
Subjects: Combinatorics, Physics, Nuclear and High Energy Physics
Abstract: M.I. Adamovich a, M.M. Aggarwal b, Y.A. Alexandrov a, N.P. Andreeva c, Z.V. Anson c, R. Arora b, F.A. Avetyan d, S.K. Badyal e, E. Basova f, K.B. Bhalla g, A. Bhasin e, V.S. Bhatia b, V.G. Bogdanov h, V.I. Bubnov c, T.H. Burnett i, X. Cai J, I.Y. Chasnikov c, L.P. Chernova k, M.M. Chernyavski a, B. Dressel ~, G.Z. Eligbaeva c, L.E. Eremenko ~, E.M. Friedlander m, A.S. Gaitinov ~, E.R. Ganssauge ~, S. Garpman ", S.G. Gerassimov a, j. Grote i, K.G. Gulamov k, S.K. Gupta g, V. Gupta e, H.H. Heckrnan ~, H. Huang J, B. Jakobsson ", B. Judek o, S. Kachroo e, F.G. Kadyrov k, G.S. Kalyachkina c, E.K. Kanygina ~, M. Karabova P, G.L. Kaul e, M. Kaur b, S.P. Kharlamov a, T. Koss i, S.A. Krasnov P, V. Kumar g, P. Lal g, V.G. Larionova a, V.N. Lepetan ~, P.J. Lindstrom m, L.S. Liu J, S. Lokanathan g, J. Lord i, N.S. Lukicheva k, S.B. Luo q, L.K. Mangotra e, N.A. Marutyan d, N.V. Maslennikova ", I.S. Mittra b, S. Mookerjee g, C. Mueller ~, H. Nasrulaeva f, S.H. Nasyrov f, V.S. Navotny k, G.I. Orlova a, I. Otterlund n, H.S. Palsania g, N.G. Peresadko a, N.V. Petrov f, V.A. Plyushchev h, W.Y. Qian J, R. Raniwala g, S. Raniwala g, N.K. Rao ~, V.M. Rappoport a, J.T. Rhee ~, N. Saidkhanov k, N.A. Salmanova ~, L.G. Sarkisova d, V.R. Sarkisyan d, W. Schulz ~, G.S. Shabratova P, T.I. Shakhova ~, B. Singh b, D. Skelding i, K. SSderstrSm ", Z.I. Solovjeva h, E. Stenlund n, S.C. Strausz i, J.F. Sun r, L.N. Svechnikova k, K.D. Tolstov P, M.I. Tretyakova a, T.P. Trofimova r, U. Tuleeva r, S. Vokal P, H.Q. Wang J, Z.Q. Weng r, R.J. Wilkes i, G.F. Xu s, D.H. Zhang q, P.Y. Zheng s, S.I. Zhochova k, D.C. Zhou J and J.C. Zhou J
Published: 1991

31. Slow, target associated particles produced in ultrarelativistic heavy-ion interactions

Author: F. G. Kadyrov, Z. I. Solovjeva, T. I. Shakhova, D. Skelding, J. T. Rhee, H. Huang, M. I. Tretyakova, L. N. Svechnikova, N. A. Salmanova, S. K. Badyal, X. Cai, N. G. Peresadko, E. S. Basova, K. G. Gulamov, S. Lokanathan, Manjit Kaur, V. I. Bubnov, V. M. Rappoport, P. J. Lindstrom, S. Mookerjee, V. Kumar, J. J. Lord, N. V. Petrov, J. Grote, S. A. Krasnov, G. Z. Eligbaeva, T. Koss, Gautam Kaul, S. C. Strausz, F. A. Avetyan, A. S. Gaitinov, E. K. Kanygina, L. K. Mangotra, L. G. Sarkisova, V. A. Plyushchev, M. Karabova, L. E. Eremenko, S. P. Kharlamov, W. Schulz, L. P. Chernova, Bo Jakobsson, S. Vokal, P. Lal, V. G. Bogdanov, C. Mueller, D. C. Zhou, H. Q. Wang, V. R. Sarkisyan, S. B. Luo, D. H. Zhang, W. Y. Qian, T. H. Burnett, S. Garpman, I. Y. Chasnikov, Anju Bhasin, N. Saidkhanov, Y. A. Alexandrov, N. A. Marutyan, Renu Arora, N. P. Andreeva, Z. Q. Weng, G. S. Kalyachkina, N. V. Maslennikova, G. F. Xu, Evert Anders Stenlund, U.I. Tuleeva, S. G. Gerassimov, T. P. Trofimova, V. N. Lepetan, M. M. Chernyavsky, Madan M. Aggarwal, S. I. Zhokhova, V. S. Bhatia, E. R. Ganssauge, M. I. Adamovich, L. S. Liu, V. G. Larionova, V. S. Navotny, Z. V. Anson, I. S. Mittra, K. B. Bhalla, S. Kachroo, K. Söderström, B. Judek, N. S. Lukicheva, E. M. Friedlander, Sudhir Raniwala, Rashmi Raniwala, B. Singh, N. K. Rao, P. Y. Zheng, R. J. Wilkes, S. K. Gupta, G.S. Shabratova, H. Nasrulaeva, G. I. Orlova, Vivek K. Gupta, I. Otterlund, B. Dressel, K. D. Tolstov, H. S. Palsania, J. F. Sun, S. H. Nasyrov, and H. H. Heckman
Subjects: Physics, Nuclear and High Energy Physics, High Energy Physics::Phenomenology, Nuclear Theory, Hadron, Charged particle, Nuclear physics, medicine.anatomical_structure, medicine, Heavy ion, Nuclear emulsion, Atomic physics, Nuclear Experiment, Nucleus
Abstract: The slow, target associated particles produced in ultrarelativistic heavy-ion interactions are a quantitative probe of the cascading processes in the spectator parts of the target nucleus. These processes are directly influenced by the proper timescale for the formation of hadronic matter. In this letter we show experimental data on singly and multiply charged particles, with velocities smaller than 0.7 c , produced in ultrarelativistic heavy-ion interactions in nuclear emulsion.
Published: 1991

32. STOCHASTIC EMISSION OF PARTICLES IN ULTRA-RELATIVISTIC HEAVY-ION COLLISIONS

Author: S. Mookerjee, S. Kachroo, N. G. Peresadko, E. S. Basova, L. K. Mangotra, F. G. Kadyrov, Z. I. Solovjeva, S. I. Zhochova, T. I. Shakhova, Sudhir Raniwala, N. V. Petrov, H. Nasrulaeva, G. I. Orlova, Gautam Kaul, I. Otterlund, Rashmi Raniwala, K. Söderström, M. M. Chernyavski, T. H. Burnett, D. Skelding, Madan M. Aggarwal, K. G. Gulamov, F. A. Avetyan, B. Singh, J. T. Rhee, S. P. Kharlamov, Z. V. Anson, V. G. Bogdanov, N. K. Rao, T. P. Trofimova, V. Kumar, V. S. Navotny, P. J. Lindstrom, V. A. Plyushchev, S. Vokal, V. M. Rappoport, H. Huang, E. K. Kanygina, L. N. Svechnikova, I. S. Mittra, U.I. Tuleeva, N. A. Marutyan, Renu Arora, H. S. Palsania, L. E. Eremenko, L. P. Chernova, X. Cai, S. Garpman, E. R. Ganssauge, V. S. Bhatia, K. B. Bhalla, L. S. Liu, V. G. Larionova, P. Y. Zheng, Vivek K. Gupta, G. Z. Eligbaeva, W. Schulz, N. A. Salmanova, Bo Jakobsson, Manjit Kaur, N. P. Andreeva, B. Dressel, K. D. Tolstov, V. R. Sarkisyan, H. H. Heckman, M. I. Adamovich, S. G. Gerassimov, P. Lal, S. A. Krasnov, I. Y. Chasnikov, Y. A. Alexandrov, Anju Bhasin, G. F. Xu, N. Saidkhanov, A. S. Gaitinov, R. J. Wilkes, S. K. Badyal, B. Judek, E. Stenlund, V. N. Lepetan, Z. Q. Weng, Dong-Hai Zhang, N. S. Lukicheva, J. F. Sun, E. M. Friedlander, L. G. Sarkisova, S. H. Nasyrov, S. B. Luo, S. Lokanathan, D. C. Zhou, N. V. Maslennikova, C. Mueller, J. C. Zhou, S. C. Strausz, M. L. Tretyakova, G. S. Kalyachina, S. K. Gupta, G.S. Shabratova, J. J. Lord, J. Grote, T. Koss, M. Karabova, H. Q. Wang, W. Y. Qian, and V. I. Bubnov
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Fragmentation (mass spectrometry), Particle number, Elliptic flow, General Physics and Astronomy, Astronomy and Astrophysics, Heavy ion, Relativistic particle
Abstract: In this letter we show that most of the fluctuations in particle densities observed in relativistic heavy-ion collisions are consistent with stochastic emission, i.e., most of the correlations between produced particles are washed out due to the vast number of particles in the environment. We further explore the general trends by investigating different systems, energies and centrality cuts. Comparisons with the Fritiof model show that string fragmentation gives results similar to the data.
Published: 1991

33. On the multiplicity fluctuations in relativistic heavy ion collisions

Author: J. J. Lord, J. Grote, D. Skelding, N. G. Peresadko, J. T. Rhee, I. Otterlund, J. F. Sun, P. J. Lindstrom, A. Gill, K. G. Gulamov, S. H. Nasyrov, F. G. Kadyrov, V. Kumar, L. P. Chernova, Madan M. Aggarwal, Gautam Kaul, K. B. Bhalla, M. M. Chernyavsky, S. Kachroo, S. P. Kharlamov, D. H. Zhang, B. Judek, N. S. Lukicheva, Renu Arora, S. Garpman, G. F. Xu, S. I. Gadzhieva, U. G. Gulyamov, V. S. Bhatia, L. S. Liu, Y. A. Alexandrov, V. G. Larionova, N. V. Petrov, C. Mueller, B. Dressel, I. S. Mittra, M. I. Adamovich, V. S. Navotny, H. Q. Wang, Anju Bhasin, W. Y. Qian, Z. O. Weng, Evert Anders Stenlund, W. Schulz, S. G. Gerassimov, S. Mookerjee, K. Söderström, L. N. Svechnikova, G. I. Orlova, N. V. Maslennikova, H. H. Heckman, M. I. Tretyakova, S. B. Luo, X. Cai, V. S. Shukla, T. H. Burnett, L. K. Mangotra, Manjit Kaur, P. Lal, J. C. Zhou, S. Lokanathan, D. C. Zhou, N. A. Salmanova, S. Hackel, Stefan Persson, E. R. Ganssauge, Rashmi Raniwala, B. Singh, N. K. Rao, E. M. Friedlander, Sudhir Raniwala, P. Y. Zheng, and R. J. Wilkes
Subjects: Nuclear reaction, Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Dispersion relation, Hadron, Negative binomial distribution, Observable, Multiplicity (mathematics), Elementary particle, Nuclear Experiment, Ion
Abstract: In the present letter we discuss the general features of the multiplicity distributions in relativistic heavy ion collisions. It is shown that from simple statistical considerations it is possible to predict the dependence of the dispersions of multiplicity distributions on the average multiplicities in any given rapidty wwindow. The applicability of the negative binomial distribution to multiplicity distributions from collisions with heavy ions is discussed.
Published: 1990

34. ON THE ENERGY AND MASS DEPENDENCE OF THE MULTIPLICITY IN RELATIVISTIC HEAVY-ION INTERACTIONS

Author: G. F. Xu, S. I. Gadzhieva, K. Söderström, R. A. Bondarenko, L. N. Svechnikova, D. C. Zhou, I. Otterlund, D. Skelding, J. T. Rhee, S. P. Kharlamov, P. J. Lindstrom, M. I. Adamovich, R. S. Storey, H. Kallies, N. V. Maslennikova, R. J. Wilkes, L. K. Mangotra, F. G. Kadyrov, B. Judek, N. S. Lukicheva, P. Lal, Anju Bhasin, S. Mookerjee, N. Saidkhanov, S. Kachroo, Madan M. Aggarwal, Renu Arora, E. M. Friedlander, N. A. Salmanova, V. S. Bhatia, S. Hackel, N. G. Peresadko, E. S. Basova, L. S. Liu, V. G. Larionova, H. H. Heckman, M. I. Tretyakova, Stefan Persson, N. V. Petrov, X. Cai, E. R. Ganssauge, V. S. Navotny, K. B. Bhalla, E. Stenlund, Manjit Kaur, H. Q. Wang, W. Y. Qian, Gautam Kaul, J. F. Sun, L. P. Chernova, S. Lokanathan, S. H. Nasyrov, S. Garpman, J. J. Lord, J. Grote, W. Schultz, Z. O. Weng, A. Gill, Y. A. Alexandrov, S. G. Gerassimov, J. C. Zhou, P. Y. Zheng, U. G. Gulyamov, T. P. Trofimova, C. Mueller, I. S. Mittra, Sudhir Raniwala, G. I. Orlova, V. S. Shukla, B. Dressel, Rashmi Raniwala, M. M. Chernyavsky, N. K. Rao, K. G. Gulamov, V. Kumar, T. H. Burnett, and Dong-Hai Zhang
Subjects: Physics, Nuclear and High Energy Physics, Nuclear Theory, General Physics and Astronomy, Binary number, Astronomy and Astrophysics, Multiplicity (mathematics), Relativistic particle, Nuclear physics, Heavy ion, Nuclear emulsion, Atomic physics, Nuclear Experiment, Nucleon
Abstract: The average multiplicities of singly charged relativistic particles in oxygen-induced interactions with a nuclear emulsion target are studied over the energy range 2.1–200 A GeV. A similar energy dependence as for proton-induced interactions is observed. Both the number of participating nucleons and the number of binary collisions are shown to be of importance for the particle production.
Published: 1990

35. Target nucleus fragmentation in 16O+(Ag,Br) interactions at 200 A GeV

Author: M. M. Chernyavsky, V. Kumar, K. Söderström, R. A. Bondarenko, C. Mueller, S. Hackel, K. B. Bhalla, U. G. Gulyamov, J. J. Lord, Stefan Persson, S. Lokanathan, J. Grote, L. P. Chernova, S. Kachroo, E. R. Ganssauge, Sudhir Raniwala, M. I. Adamovich, H. Q. Wang, P. J. Lindstrom, L. K. Mangotra, F. G. Kadyrov, S. Mookerjee, B. Judek, W. Y. Qian, A. Gill, Renu Arora, N. S. Lukicheva, I. S. Mittra, V. S. Bhatia, P. Y. Zheng, P. Lal, N. A. Salmanova, L. S. Liu, V. G. Larionova, H. H. Heckman, J. C. Zhou, R. S. Storey, H. Kallies, N. V. Maslennikova, I. Otterlund, D. Skelding, J. T. Rhee, D. C. Zhou, B. Dressel, E. Stenlund, Rashmi Raniwala, W. Schultz, J. F. Sun, L. N. Svechnikova, S. H. Nasyrov, N. K. Rao, Y. A. Alexandrov, G. F. Xu, S. I. Gadzhieva, R. J. Wilkes, N. V. Petrov, Madan M. Aggarwal, T. P. Trofimova, Dong-Hai Zhang, V. S. Navotny, G. I. Orlova, Z. O. Weng, T. H. Burnett, V. S. Shukla, E. M. Friedlander, Anju Bhasin, N. Saidkhanov, Manjit Kaur, N. G. Peresadko, E. S. Basova, Gautam Kaul, S. Garpman, S. G. Gerassimov, M. I. Tretyakova, X. Cai, S. P. Kharlamov, and K. G. Gulamov
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Cascade, Multiplicity (chemistry), Nuclear Experiment, Particle Physics - Experiment, Nucleus fragmentation
Abstract: The multiplicity distributions of low-energetic target-associated particles from 200 A GeV oxygen-induced interactions with emulsion nuclei are presented. The experimental distributions are compared with distributions obtained using the Ranft and Fritiof simulation codes. It is found that the intra-nuclear cascade plays an important role in ion-induced interactions, similar to what is the case for hadron-induced interactions.
Published: 1990

36. Limiting Fragmentation, Scaling and Substructual Dependence of Multiparticle Production in High Energy Heavy Ion Reactions

Author: EMUO1 Collaboration, I Otterlund, M I Adamovich, M M Aggarwal, N P Andreeva, Z V Anson, Z V Ameeva, R Arora, Y A Alexandrov, S A Azimov, E Basova, K B Bhalla, A Bhasin, V S Bhatia, V I Bubnov, R A Bondarenko, T H Burnett, X Cai, I Y Chasnicov, L P Chernova, M M Chernyavsky, B Dressel, L E Eremenko, G Z Eligbaeva, E M Friedlander, S I Gadzhieva, A S Gaitinov, E R Ganssauge, S Garpman, S G Gerassimov, A Gill, J Grote, K G Gulamov, U G Gulyamov, S Hackel, H H Heckman, B Judek, S Kachroo, F G Kadyrov, H Kallies, G S Kalyachkina, E K Kanygina, G L Kaul, M Kaur, S P Kharlamov, T Koss, V Kumar, P Lal, V G Larionova, P J Lindstrom, L S Liu, S Lokanathan, J Lord, N S Lukicheva, L K Mangotra, N V Maslennikova, I S Mittra, S Mookerjee, C Mueller, S H Nasyrov, V S Navotny, G I Orlova, N G Peresadko, S Persson, N V Petrov, W Y Qian, R Raniwala, S Raniwala, N K Rao, J T Rhee, N Saidkhanov, N A Salmanova, T I Shakhova, W Schultz, V S Shukla, D Skelding, K Soderstrom, E Stenlund, R S Storey, S Strausz, J F Sun, L N Svechnikova, M I Tretyakova, T P Trofimova, H Q Wang, Z O Weng, R J Wilkes, G F Xu, D H Zhang, P Y Zheng, D C Zhou, and J C Zhou
Subjects: Physics, High energy, Astrophysics::High Energy Astrophysical Phenomena, Limiting, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Nuclear physics, Low energy, Fragmentation (mass spectrometry), Emulsion, High Energy Physics::Experiment, Heavy ion, Multiplicity (chemistry), Nuclear Experiment, Scaling, Mathematical Physics
Abstract: We report on recent results obtained by the EMUO1 collaboration from studies of 16O + emulsion, at 14.6, 60 and 200 A GeV, and 32S + emulsion and 32S + Au interactions at 200 A GeV. Shower-particle production in oxygen-induced interactions are studied over the energy range 2.1-200 A GeV. Scaling and limiting fragmentation are observed. Multiplicity and angular distributions of low energy target-associated particles are presented and compared with distributions obtained using the Ranft and the Fritiof simulation codes.
Published: 1990

37. Clustering in light nuclei in fragmentation above 1 A GeV

Author: G. I. Orlova, I. Tsakov, N. A. Kachalova, V. G. Larionova, A. Vokalova, V. Bradnova, L. A. Goncharova, A. A. Moiseenko, P. I. Zarubin, T. V. Shchedrina, V. V. Rusakova, S. Vokal, A. Sh. Gaitinov, V. R. Sarkisyan, Maria Haiduc, D. A. Artemenkov, Alexander Kovalenko, N. G. Peresadko, Natalia Polukhina, E. Stan, N. P. Andreeva, M. M. Chernyavsky, P. A. Rukoyatkin, Alexander Malakhov, R. Stanoeva, S. G. Gerasimov, S. P. Kharlamov, and I. G. Zarubina
Subjects: Physics, Nuclear and High Energy Physics, Light nucleus, Nuclear Theory, FOS: Physical sciences, Nuclear physics, Nuclear track, Nuclear astrophysics, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Invariant (mathematics), Nucleon, Nuclear Experiment, Relative energy
Abstract: The relativistic invariant approach is applied to analyzing the 3.3 A GeV $^{22}$Ne fragmentation in a nuclear track emulsion. New results on few-body dissociations have been obtained from the emulsion exposures to 2.1 A GeV $^{14}$N and 1.2 A GeV $^{9}$Be nuclei. It can be asserted that the use of the invariant approach is an effective means of obtaining conclusions about the behavior of systems involving a few He nuclei at a relative energy close to 1 MeV per nucleon. The first observations of fragmentation of 1.2 A GeV $^{8}$B and $^{9}$C nuclei in emulsion are described. The presented results allow one to justify the development of few-body aspects of nuclear astrophysics., 7 pages, 8 figures, 3 tables, Nuclear Physics in Astrophysics-2, 16-20 May, 2005 (ATOMKI), Debrecen, Hungary
Published: 2006

38. Nuclear Clustering Quest in Relativistic Multifragmentation

Author: M. M. Chernyavsky, G. I. Orlova, N. A. Salmanova, N. G. Polukhina, M. Haiduc, V. G. Larionova, S. P. Kharlamov, P. A. Rukoyatkin, V. V. Rusakova, Alexander Kovalenko, V. Bradnova, V. A. Krasnov, N. G. Peresadko, Alexander Malakhov, L. Just, S. Vokál, and P. L Zarubin
Subjects: Physics, Nuclear physics, Isotope, Nuclear Theory, Solid angle, Nuclear emulsion, Nuclear Experiment, Cluster analysis, Image resolution
Abstract: The status of nuclear clustering studies performed by nuclear emulsion irradiations in beams of light relativistic nuclei is briefly reviewed. Thanks to the best spatial resolution and full solid angle acceptance provided by nuclear emulsions, such an approach allows one to obtain a unique and evident observations reflecting cluster-like features in light nuclear structures. Future investigations are suggested in relativistic beams of He, Be, B, C, and N isotopes.
Published: 2003

39. Factorization of fragmentation cross-sections in heavy-ion collisions at 1A GeV

Author: T. P. Trofimova, S.Z. Nasyrov, A. Dirner, K. G. Gulamov, Bekhzod S Yuldashev, S. Vokal, F. Schussler, N. G. Peresadko, E. S. Basova, A. Pavukova, M. I. Adamovich, V. G. Larionova, N. A. Salmanova, G. I. Orlova, M. M. Chernyavsky, K. Söderström, N. V. Petrov, S. P. Kharlamov, S. K. Tuli, Janka Vrlakova, B.P. Tursunov, I. D. Ohja, M. I. Tretyakova, V. S. Navotny, V. Singh, U.I. Tuleeva, Bhartendu K. Singh, M. Karabova, Bo Jakobsson, L. Just, M. Tothova, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)
Subjects: Nuclear physics, Physics, Factorization, Fragmentation (mass spectrometry), 010308 nuclear & particles physics, 0103 physical sciences, 25.70.Mn, General Physics and Astronomy, Heavy ion, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 010306 general physics, Breakup, 01 natural sciences
Abstract: Fe-, Kr- and Xe-induced heavy-ion reactions at ~ 1 A GeV show factorization in the production cross-sections only for light fragments. Both "strong" and "weak" factorization are found for light fragments. The cross-sections of these fragments are described in detail within the prescription of cold breakup of spectator residues.
Published: 2000

40. Measurements of 525 GeV pion interactions in emulsion

Author: R. Holynski, M. Szarska, A. Dabrowska, N. A. Salmanova, A. Jurak, L. N. Svechnikova, N. S. Lukicheva, G. I. Orlova, S. G. Gerassimov, Michael Cherry, N. G. Peresadko, K. Sengupta, Krzysztof Wozniak, Barbara Wosiek, M. I. Tretyakova, S. I. Zhochova, V. S. Navotny, V. G. Larionova, W. V. Jones, S. P. Kharlamov, M. I. Adamovich, Baklickaj E, N. Saidkhanov, K. G. Gulamov, J. P. Wefel, L. P. Chernova, and M. M. Chernyavski
Subjects: Physics, Nuclear reaction, Particle physics, Projectile, Computer Science::Information Retrieval, Multiplicity (mathematics), Lower energy, Nuclear physics, Pion, Pseudorapidity, High Energy Physics::Experiment, Nuclear Experiment, Scaling, Beam energy
Abstract: Measurements have been made of inclusive 525 GeV [pi][sup [minus]] interactions in emulsion. The results are compared to proton-emulsion and lower energy pion-emulsion data. Average multiplicities of relativistic shower particles increase with increasing energy, although with a somewhat steeper slope above 60 GeV than at lower energies. The ratio [l angle][ital n][sub [ital s]][r angle][sub [ital p]]/[l angle][ital n][sub [ital s]][r angle][sub [pi]][similar to]1.1 over the energy range 60--525 GeV. The ratio of the dispersion in the multiplicity distribution to the average multiplicity is the same for proton and pion collisions in emulsion, and is independent of projectile energy. The shape of the shower particle multiplicity distribution does not vary significantly with energy, and KNO scaling appears to hold over the energy range 60--525 GeV. The shower particle pseudorapidity distributions are independent of the beam energy in the target and projectile fragmentation regions, and both the pseudorapidity and multiplicity distributions agree reasonably well with the FRITIOF model predictions for 525 GeV pions. The dependence of the shower particle multiplicity [l angle][ital n][sub [ital s]][r angle] on the number of heavy tracks [ital N][sub [ital h]] appraoches saturation as the total shower particle energy becomes a significant fraction of [radical][ital s]more » , and the pseudorapidity distributions shift toward smaller [l angle][eta][r angle] with increasing numbers of grey and black tracks at 525 GeV. Neither the average number [l angle][ital N][sub [ital h]][r angle] nor the multiplicity distributions of the heavily ionizing tracks vary significantly with energy, and the normalized angular distributions of grey and black tracks are independent of the type of projectile or projectile energy.« less
Published: 1994

41. Scaled-factorial-moment analysis of 200A-GeV sulfur+gold interactions

Author: P. J. Lindstrom, T. H. Burnett, Madan M. Aggarwal, V. S. Shukla, L. K. Mangotra, F. G. Kadyrov, I. Otterlund, K. G. Gulamov, V. Kumar, B. Judek, N. V. Petrov, N. S. Lukicheva, V. S. Navotny, E. Stenlund, P. Y. Zheng, Rashmi Raniwala, N. K. Rao, J. F. Sun, N. A. Salmanova, Bhartendu K. Singh, G. Z. Eligbaeva, S. H. Nasyrov, Renu Arora, V. I. Bubnov, P. Lal, S. Mookerjee, J. C. Zhou, S. C. Strausz, S. Kachroo, V. S. Bhatia, L. S. Liu, V. G. Larionova, Sudhir Raniwala, I. S. Mittra, S. K. Badyal, L. N. Svechnikova, C.I. Shakhova, H. Q. Wang, D. Skelding, A. S. Gaitinov, J. T. Rhee, G. I. Orlova, W. Y. Qian, Dong-Hai Zhang, A. Gill, G. S. Kalyachkina, M. M. Chernyavski, S. Lokanathan, E. M. Friedlander, K. B. Bhalla, C. Mueller, U. G. Gulyamov, Vivek K. Gupta, E. K. Kanygina, L. P. Chernova, B. Dressel, J. J. Lord, J. Grote, T. Koss, K. Söderström, G. F. Xu, S. I. Gadzhieva, R. J. Wilkes, L. E. Eremenko, W. Schultz, I. Y. Chasnikov, Y. A. Alexandrov, Manjit Kaur, S. B. Luo, Anju Bhasin, Z. Q. Weng, S. Hackel, S. P. Kharlamov, Z.V. Anzon, Stefan Persson, E. R. Ganssauge, M. I. Tretyakova, X. Cai, D. C. Zhou, M. I. Adamovich, S. Garpman, N. P. Andreeva, S. G. Gerassimov, N. G. Peresadko, Gautam Kaul, H. H. Heckman, H. Haung, N. V. Maslennikova, and Z. V. Ameeva
Subjects: Physics, Nuclear reaction, Monte Carlo method, Zero (complex analysis), General Physics and Astronomy, chemistry.chemical_element, Central region, Sulfur, Bin, Nuclear physics, chemistry, Pseudorapidity, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, Factorial moment
Abstract: S+Au interactions at 200{ital A} GeV were observed using emulsion chambers, permitting measurement of pseudorapidities in the central region with precision {similar to}0.01 unit. Scaled-factorial-moment analyses are extended to bin sizes smaller than those accessible to other fixed-target experimental techniques. For a sample of 151 central collisions, moments are calculated using both horizontal'' and vertical'' analysis techniques. While the moments are found to rise (in a log-log plot) with decreasing pseudorapidity bin size {delta}{eta}, their slopes roll off to approximately zero for {delta}{eta}{lt}0.1.
Published: 1990

42. Investigation of Clustering in Light Nuclei by Means of Relativistic-Multifragmentation Processes.

Author: M. I. Adamovich, V. A., V. Bradnova, V. A., S. Vokal, V. A., S. G. Gerasimov, V. A., V. A. Dronov, V. A., P. I. Zarubin, V. A., A. D. IKovalenko, V. A., K. A. Kotel'nikov, V. A., V. A. Krasnov, V. G. Larionova, V. A., F. G. Lepekhin, V. A., A. I. Malakhov, V. A., G. I. Orlova, V. A., N. G. Peresadko, V. A., N. G. Polukhina, V. A., P. A. Rukoyatkin, V. A., V. V. Rusakova, V. A., N. A. Salmanova, V. A., B. B. Simonov, V. A., and M. M. Chernyavsky, V. A.
Subjects: CLUSTER theory (Nuclear physics), LITHIUM, BORON, RELATIVISTIC quantum theory, RADIOISOTOPES, PARTICLES (Nuclear physics)
Abstract: New results concerning the topology of the fragmentation of relativistic nuclei 7Li and 10B are presented. A program is proposed for studying the cluster structure of stable and radioactive nuclei. The use of emulsions in the investigation of nuclear clustering in the fragmentation of light nuclei at energies are in excess of 1 GeV per nucleon is discussed. © 2004 MAIK “Nauka / Interperiodica”. [ABSTRACT FROM AUTHOR]
Published: 2004
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43. Rapidity densities and their fluctuations in central 200 A GeV 32S interactions with Au and Ag, Br nuclei EMU01 collaboration

Author: D. H. Zhang, W. Schultz, Y. A. Alexandrov, N. V. Petrov, K. G. Gulamov, V. Kumar, I. Y. Chasnicov, D. Skelding, P. J. Lindstrom, G. F. Xu, S. I. Gadzhieva, G. Z. Eligbaeva, R.A. Bondarenko, J. T. Rhee, R. S. Storey, H. Kallies, N. V. Maslennikova, G. S. Kalyachkina, V. S. Shukla, N. P. Andreeva, J. C. Zhou, Rashmi Raniwala, V. I. Bubnov, A. Gill, S.A. Azimov, S. G. Gerassimov, I. Otterlund, T. H. Burnett, F. G. Kadyrov, P. Lal, Manjit Kaur, M. M. Chernyavsky, K. Soderstrom, Z. V. Anson, N. A. Salmanova, T. P. Trofimova, N. G. Peresadko, N. K. Rao, S. Lokanathan, T. I. Shakhova, S. Kachroo, M.M. Aggarwal, L. E. Eremenko, U.C. Gulyamov, I. S. Mittra, G. I. Orlova, H. H. Heckman, J. J. Lord, E. M. Friedlander, Sudhir Raniwala, Z. O. Weng, J. Grote, S. Garpman, Gautam Kaul, S. Mookerjee, T. Koss, S. C. Strausz, C. Mueller, P. Y. Zheng, H. Q. Wang, S. P. Kharlamov, E. Stenlund, R. J. Wilkes, W. Y. Qian, L. K. Mangotra, Anju Bhasin, N. Saidkhanov, J. F. Sun, E. K. Kanygina, R. Arora, V. S. Bhatia, L. S. Liu, V. G. Larionova, A. S. Gaitinov, S. H. Nasyrov, M. I. Tretyakova, X. Cai, B. Dressel, Z. V. Ameeva, M. I. Adamovich, L. N. Svechnikova, S. Hackel, K. B. Bhalla, E. Basova, V. S. Navotny, B. Judek, N. S. Lukicheva, Stefan Persson, E. R. Ganssauge, D. C. Zhou, and L. P. Chernova
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, High Energy Physics::Experiment, Rapidity, Multiplicity (chemistry), Atomic physics, Nuclear Experiment
Abstract: The pseudo-rapidity density distributions of shower particles (n s ) are measured in central inelastic S + Au and S + Ag,Br inter-actions. The extracted maximum energy densities, while being higher for Au than for Ag.Br interactions, were found to be similar to those obtained for oxygen emulsion interactions. The correlation between rapidity density and shower particle multiplicity shows a small deviation from the Lund Model Fritiof for the highest energy densities in S + Au interactions, whereas the bulk of the data yields satisfactory agreement.
Published: 1989

44. Investigation of inelastic interactions of 400 GeV protons with emulsion nuclei

Author: S. P. Kharlamov, N. V. Maslennikova, V. I. Petrov, A.V. Kholmetskaya, B. B. Simonov, Kh. D. Kabulniyazov, E.G. Boos, M. M. Chernyavskij, N. S. Scripnik, V. G. Larionova, S.A. Azimov, K. G. Gulamov, N.P. Pavlova, F. G. Lepekhin, S. I. Gadzhieva, M. I. Tretyakova, T.P. Trofimova, F.R. Yagudina, G. I. Orlova, L. P. Chernova, N. S. Kasymova, M. I. Adamovich, P.V. Morozova, G. M. Chernov, A.I. Borisenko, A.N. Kazanskaya, and Sh. Abduzhamilov
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Nuclear Theory, Emulsion, Experimental data, Multiplicity (chemistry), Nuclear Experiment
Abstract: The basic experimental characteristics of incoherent interactions of 400 GeV protons on emulsion nuclei, such as the multiplicity of charged secondaries, one-particle distributions and two-particle correlations, are reported and discussed in details. They are compared with the results of other experiments on hadron-nucleus interactions at lower energies. We have shown from both the quantitative and qualitative comparison of the data presented with predictions of various model approaches to nuclear production, that most of them cannot explain the complete set of experimental observations. An analysis of the experimental data presented gives strong support to the idea that the production mechanism in high-energy hadron-nucleus interactions has two or multi-component character.
Published: 1978

45. Scaling properties of charged particle multiplicity distributions in oxygen induced emulsion interactions at 14.6, 60 and 200 A GeV

Author: S. Hackel, S. Lokanathan, V. S. Shukla, E. M. Friedlander, G. I. Orlova, B. Dressel, S.A. Azimov, Stefan Persson, S. P. Kharlamov, F. Schussler, E. R. Ganssauge, K. G. Gulamov, V. Kumar, P. Y. Zheng, R. Arora, Z. O. Weng, P. Lal, V. S. Bhatia, S. Garpman, L. S. Liu, V. G. Larionova, R. S. Storey, H. Kallies, N. V. Maslennikova, L. Karlsson, R. J. Wilkes, D. C. Zhou, Anju Bhasin, N. Saidkhanov, I. Otterlund, A. Gill, H. Q. Wang, S. Kachroo, S. G. Gerassimov, M. M. Chernyavsky, W. Y. Qian, E. Monnand, Sudhir Raniwala, K. Söderström, M. I. Adamovich, T. H. Burnett, N. A. Salmanova, Madan M. Aggarwal, Rashmi Raniwala, N. G. Peresadko, E. S. Basova, Manjit Kaur, J. C. Zhou, P. J. Lindstrom, H. H. Heckman, J. J. Lord, M. I. Tretyakova, S. Mookerjee, N. K. Rao, R. A. Bondarenko, X. Cai, J. Grote, V. S. Navotny, Gautam Kaul, L. N. Svechnikova, J. F. Sun, S. H. Nasyrov, D. Skelding, J. T. Rhee, F. G. Kadyrov, Evert Anders Stenlund, K. B. Bhalla, B. Judek, N. S. Lukicheva, U. G. Gulyamov, Bo Jakobsson, G. F. Xu, S. I. Gadzhieva, C. Mueller, L. K. Mangotra, T. P. Trofimova, N. V. Petrov, I. S. Mittra, L. P. Chernova, D. H. Zhang, W. Schultz, and Y. A. Alexandrov
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, chemistry, Projectile, Emulsion, chemistry.chemical_element, Multiplicity (mathematics), Atomic physics, Scaling, Oxygen, Particle Physics - Experiment, Charged particle
Abstract: The multiplicity distributions of shower particles (ns) are measured in inclusive inelastic oxygen emulsion interactions. Scaling is observed in the normalized variable ns/〈ns〉 for 14.6, 60 and 200 AGeV. The dependence of 〈ns〉 on the charge flow in the forward direction (QZD) and the distribution of the number of participating projectile protons is examined. The normalized multiplicities as a function of QZD seem also to be independent of incident energies. A comparison with the Lund model Fritiof yields satisfactory agreement.
Published: 1989

46. Observation of a collective flow in22Ne collisions with Ag(Br) emulsion nuclei at 4.1 A GeV/c

Author: D.A. Salomov, A. S. Gaitinov, M. Haiduk, V. A. Plyushchev, S. Vokal, N. I. Kastanashvili, F. G. Lepekhin, M. Shumbera, S. P. Harlamov, G. S. Shabratova, N. A. Salmanova, V. M. Kirshchan, T. I. Shachova, B. U. Ameeva, V. A. Antonchik, L. G. Sarkisova, G. S. Kalyachkina, L. E. Eremenko, V. I. Bubnov, G. I. Orlova, S. I. Solovieva, M. M. Cherniavsky, E. K. Kanygina, M. I. Tretyakova, M. Gitsok, V. I. Ostroumov, E. Siles, I. J. Chasnikov, D. Tuvdendorzh, A. El-Naghy, V. A. Leskin, V. G. Bogdanov, F. A. Avetian, B. P. Bannik, N. V. Maslennikova, K. D. Tolstov, M. I. Adamovich, V. R. Sarkisian, V. Topor, S. A. Krasnov, R. Togoo, A. J. Lihachev, N. A. Marutian, Z. V. Anzon, M. Karabova, B. B. Simonov, M. Totova, V. G. Larionova, L. Serdamba, N. P. Andreeva, and S. D. Bogdanov
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Splash, Projectile, Nuclear Theory, Emulsion, Nuclear fusion, Atomic physics, Nuclear Experiment
Abstract: In the collisions of 4.1 A GeV/c22Ne with AgBr emulsion nuclei, events exhibiting projectile and target fragmentation have been selected. The characteristics of these events are not reproduced by the cascade-evaporation model. The angular distributions and correlation between projectile and target fragments have shown the “bounce off” of the former and the “side splash” of the latter.
Published: 1988

47. Inelastic interactions of protons with photoemulsion nuclei at 4·5 GeV/c

Author: V. I. Ostroumov, B. Kusambaev, M. I. Adamovich, V. A. Plyushchev, M. Marku, V. Novický, A. Marin, V. I. Bubnov, V. G. Larionova, L. Achmadalieva, E. S. Basova, M. Haiduc, A. S. Gaitinov, V.A. Bakaev, G. M. Chernov, J. Karaba, I. J. Chasnikov, V. A. Leskin, V. G. Bogdanov, V.A. Antonchik, B.P. Bannik, N. A. Perfilov, U. G. Guljamov, P. N. Lebedev, N. Dalkhazhav, R. Togo, M.M. Muminov, K. D. Tolstov, L.E. Eremenko, Z. I. Solovjeva, S. Vokál, M. Šumbera, R.M. Ibatov, S. P. Kharlamov, N. A. Bondarenko, M. Karabova, A. I. Bondarenko, M. Tothova, S. D. Bogdanov, E. Siles, B. G. Rachimbajev, B. Chadra, and K. G. Gulamov
Subjects: Physics, Pion, Proton, Nuclear Theory, Energy spectrum, Inelastic collision, General Physics and Astronomy, Multiplicity (chemistry), Atomic physics, Nuclear Experiment
Abstract: In inelastic collisions of protons with photoemulsion nuclei at 4·5 GeV/c, data have been obtained on multiplicity of shower particles, energy spectrum of fast secondary protons with (2·5±0·1) GeV average energy, and energy spectrum of produced charged pions with (640±±50) MeV average energy. The multiplicity, angular distributions, and energy of particles arising from splitting target-nuclei are also determined: the proton spectrum is approximated by the power dependenceE -γ withγ=1·4±0·1. The distribution of protons andπ-mesons over rapiditiesy=0·5 In[(E+p)/(E−p)] have been obtained. The average multiplicity for secondary particles coincide with the predicted values given by the cascade-evaporation model.
Published: 1981

48. Nuclear interactions of 4.5 GeV/c protons in emulsion and the cascade-evaporation model

Author: K. G. Gulamov, Yu. P. Keloglu, S. D. Bogdanov, V. G. Larionova, V.A. Antonchik, S. P. Kharlamov, B. G. Rakhimbaev, K. D. Tolstov, V. V. Ivanov, M. Khaiduk, N. A. Perfilov, B.P. Bannik, V. G. Bogdanov, V. A. Plyushev, R. A. Bondarenko, I.Ya. Chasnikov, M. Totova, L.E. Eremenko, S. Vokal, B. Chadraa, M. Marku, A. Marin, B. F. Kostenko, Ya. Karaba, E. S. Basova, Z. I. Solovieva, V. A. Leskin, M. Karabova, B. Kusambaev, L. Akhmadalieva, R.M. Ibatov, V.A. Bakaev, G. M. Chernov, V. I. Bubnov, M.M. Muminov, M. I. Adamovich, E. Sileŝ, N. Dalkhazhav, V. Novicki, R. Togoo, S.A. Azimov, A. Sh. Gaitinov, M. Shumbera, V. I. Ostroumov, and U. G. Gulyamov
Subjects: Nuclear physics, Physics, Momentum, Nuclear and High Energy Physics, Cascade, Emulsion, Evaporation, Nuclear fusion, Nuclear Experiment
Abstract: New experimental data on proton-nucleus interactions in emulsion at primary momentum 4.5 GeV/c are presented and discussed. The data are systematically compared with predictions of the cascade-evaporation model. The directions of development of the cascade-evaporation model in a region of incident momenta are considered, and some suggestions are made for giving it more precision.
Published: 1981

49. Fragmentation of22Ne in emulsion at 4.1A GeV/c

Author: Maria Haiduc, Ts.I. Shakhova, A. Sh. Gaitinov, D. Tuvdendorzh, V. G. Bogdanov, G. I. Orlova, V M Krishchyan, S G Bogdanov, V Topor, M A Marutyan, Z. I. Solovieva, M. I. Adamovich, L G Sarkisova, N. V. Maslennikova, M. Totova, V. I. Ostroumov, K. D. Tolstov, F. A. Avetyan, G. Zh. Eligbaeva, J. A. Salomov, L Sardamba, S. P. Kharlamov, E. Siles, Z.V. Anzon, R. Togoo, V. I. Bubnov, M. I. Tretyakova, N. A. Salmanova, G S Kalyachkina, I.Ya. Chasnikov, S.A. Krasnov, V. A. Leskin, S. Vokal, V. G. Larionova, A Y Likhachev, L.E. Eremenko, M M Chernyavaski, V A Plyuschev, B. B. Simonov, A.V. Belousov, M. Karabova, M. Šumbera, V. R. Sarkisyan, E. K. Kanygina, V.A. Antonchik, N. P. Andreeva, A. El-Naghy, M Gitsok, N I Kostanashvili, and F. G. Lepekhin
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Single process, Fragmentation (mass spectrometry), Projectile, Yield (chemistry), Emulsion, General Physics and Astronomy, Charge density, Charge (physics), Nuclear Experiment
Abstract: Charge distributions of projectile fragments produced in the interactions of 22Ne beams with emulsion at 4.1A GeV/c have been studied. Correlations between projectile and target fragments and among projectile fragments are presented. The change of charge yield distribution with the violence of the collision has been shown. The present analysis contradicts theoretical calculations describing the inclusive charge yield distribution of fragments by a single process.
Published: 1988

50. Observation of pairs of charmed particles produced by high-energy photons in nuclear emulsions coupled with a magnetic spectrometer

Author: G.R. Brookes, J.B. Lane, R. Llosa, J. C. Lassalle, D. Newton, M. Dameri, A. Ruiz, W. Galbraith, A. Conti, G. Parrini, Y. A. Alexandrov, E. Higon, A.M. Cartacci, Giovanni Crosetti, R. Gessaroli, M. Davenport, J. P. Dufey, B. Willot, T. Brodbeck, A.I Schlösser, N. G. Peresadko, G. N. Patrick, K. M. Romanovskaya, S. P. Kharlamov, A. Mattei, G. I. Orlova, K.M. Storr, C. Meton, A.P. Waite, G. di Caporiacco, G. Diambrini-Palazzi, J. M. Bolta, Markus Atkinson, George Lafferty, M. m. Chernyavski, A. Forino, A. Quareni Vignudelli, J. Lory, M. I. Tretyakova, V. G. Larionova, D. Schune, J.S. Hutton, D. Mercer, B. Monteleoni-Conforto, Bianca Osculati, G. Vanderhaeghe, C. Raine, Peter Bussey, R. McClatchey, R.J. Ellison, R.E. Hughes-Jones, Mario Sannino, M. Ibbotson, B. R. Kumar, G. Tomasini, L. Bravo, J. V. Morris, M.I. Adamivich, E. Villar, M.G. Dagliana, K. Heinloth, and Tsai Chu
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, High energy photon, Large Hadron Collider, Meson, Spectrometer, D meson, Statistical analysis, Photon beam, Particle Physics - Experiment
Abstract: Preliminary results of an experiment using nuclear emulsions exposed to a tagged photon beam at the CERN SPS (experiment WA58) are presented. Six events showing pairs of charmed particles have been found. One of these has been interpreted as an associated production of Λc+ and D 0. The mean lifetime of the neutral D meson based on three events is τ0 = (0.58−0.2+0.8 × 10−13 s,, whereas a statistical analysis of eight charged charmed particles, assumed to be D mesons, leads to an estimate of the mean lifetime of τ± ≈ 4.4 × 10−13 s.
Published: 1981

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