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26 results on '"A.A. Korsheninnikov"'

1. In memory of Spartak Timofeevich Belyaev

Author

Yurii G. Abov, A.L. Barabanov, Evgenii P. Velikhov, Semen S. Gershtein, V.I. Il'gisonis, Mikhail V. Kovalchuk, A.A. Korsheninnikov, Gennadii N. Kulipanov, Pavel V. Logachev, Viktor A. Matveev, Aleksandr N. Skrinskii, and Grigorii V. Trubnikov

Subjects
General Physics and Astronomy
Published
2017

2. The 8He and 10He spectra studied in the (t,p) reaction

Author

Dan-Yang Pang, Alain Ninane, E. Yu. Nikolskii, W. Mittig, S. A. Krupko, B. G. Novatskii, S. K. Grishechkin, V. A. Gorshkov, R. S. Slepnev, A. A. Yukhimchuk, Yu. I. Vinogradov, A.A. Korsheninnikov, D. N. Stepanov, L. Stuttge, S. V. Zlatoustovskiy, V. V. Perevozchikov, E. A. Kuzmin, A. M. Rodin, G.M. Ter-Akopian, A. S. Fomichev, Yu. Ts. Oganessian, S. V. Stepantsov, F. Hanappe, S. I. Sidorchuk, M. S. Golovkov, V. Chudoba, R. Wolski, P. Roussel-Chomaz, and L. V. Grigorenko

Subjects
Physics, Nuclear and High Energy Physics, education.field_of_study, 010308 nuclear & particles physics, Population, 01 natural sciences, Spectral line, Dipole, Excited state, 0103 physical sciences, Peak value, Atomic physics, Basso continuo, 010306 general physics, Ground state, education, Excitation
Abstract

The low-lying spectra of 8He and 10He nuclei were studied in the 3H(6He, p)8He and 3H(8He, p)10He transfer reactions. The 0+ ground state (g.s.) of 8He and excited states, 2+ at 3.6–3.9 MeV and (1+) at 5.3–5.5 MeV, were populated with cross sections of 200, 100–250, and 90–125 μb/sr, respectively. Some evidence for a 8He state at about 7.5 MeV was obtained. We discuss a possible nature of the nearthreshold anomaly above 2.14 MeV in 8He and relate it to the population of a 1− continuum (soft dipole excitation) with a peak value at about 3 MeV. The lowest energy group of events in the 10He spectrum was observed at ∼ 3 MeV with a cross section of ∼ 140 μb/sr. We argue that this result is consistent with the previously reported observation of 10He providing the new 10He g.s. position at about 3 MeV

Published
2009

3. 5H and 5He nuclear systems studied by means of the 6He + 2H reaction

Author

Isao Tanihata, R. S. Slepnev, G. M. Ter-Akopian, Yu. Ts. Oganessian, S. I. Sidorchuk, M. S. Golovkov, V. A. Gorshkov, M. L. Chelnokov, E. Yu. Nikolskii, A. S. Fomichev, A. M. Rodin, S. V. Stepantsov, R. Wolski, and A.A. Korsheninnikov

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics
Published
2004

4. Recent studies of exotic nuclei in Dubna and RIKEN

Author

A.A. Korsheninnikov

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Excited state, State (functional analysis), Atomic physics, Ground state
Abstract

Recently experiments were performed in Dubna (Russia) and RIKEN (Japan) to study 5H, 7H, and 8He. The 5H state at ∼ 1.8 MeV above the t + 2n threshold was observed in the reactions p(6He, 2He)5H and t(t,p)5H. The experimental evidence for existence of 7H state near the t + 4n threshold was obtained in study of the p(8He, 2He)7H reaction. Investigation of the p(8He, t) reaction populating the ground and excited 2+-state of 6He show that the 8He ground state has a structure containing the 6He subsystem in the excited 2+ state with a large weight.

Published
2003

5. 24.5 A MeV 6He+p elastic and inelastic scattering

Author

R. S. Slepnev, P. K. Deb, E. A. Kuzmin, K. Amos, V. A. Gorshkov, A. S. Fomichev, S. V. Stepantsov, Steven Karataglidis, D. D. Bogdanov, Isao Tanihata, F. Auger, Yu. Ts. Oganessian, G. M. Ter-Akopian, A. M. Rodin, S. I. Sidorchuk, N. Alamanos, M. L. Chelnokov, E. Yu. Nikolskii, R. Wolski, A.A. Korsheninnikov, G. Lobo, M. S. Golovkov, R.L Kavalov, and V. Lapoux

Subjects
Density matrix, Physics, Nuclear and High Energy Physics, Proton, Basis (linear algebra), Inverse kinematics, Excited state, Nuclear Theory, Inelastic scattering, Atomic physics, Optical potential, Beam (structure)
Abstract

The structure of 6 He is explored with proton elastic and inelastic scattering to the first 2 + excited state (Q =− 1. 8M eV) of 6 He in the inverse kinematics using a 24.5 A MeV 6 He beam. The distorted wave approximation (DWA) with an optical potential obtained by folding an effective nucleon–nucleon (NN) g-matrix with the 6 He density matrix elements as given by a large basis shell model is used to analyse the data. The comparison of predictions with the data confirms the view that 6 He has

Published
2002

6. Nuclear radii of 17,19B and 14Be

Author

R. Janik, R. Kanungo, T. Kobayashi, M. Pfützner, K. Sümmerer, A. Ozawa, M. Fukuda, K. Kimura, Hans Geissel, M. Ivanov, L. V. Chulkov, Herbert A. Simon, D. Cortina, Isao Tanihata, O. V. Bochkarev, Margareta Hellström, M. Winkler, Takatoshi Suzuki, Koichi Yoshida, G. Münzenberg, A. A. Ogloblin, A.A. Korsheninnikov, Branislav Sitar, Kohsuke Sumiyoshi, P. Strmeň, V. Pribora, and F. Nickel

Subjects
Physics, Nuclear and High Energy Physics, Experimental uncertainty analysis, Valence (chemistry), Reaction model, Nuclear drip line, Radius, Atomic physics, Radioactive beam
Abstract

The interaction cross sections ( σ I ) of light radioactive nuclei close to the neutron drip line ( 17,19 B, 14 Be) have been measured at around 800 A MeV. The effective root-mean-square (r.m.s.) matter radii of these nuclei have been deduced from σ I by two different methods, a Glauber-type calculation based on the optical limit approximation and a few-body reaction model. The deduced radii from both approaches agree with each other within experimental uncertainty. The r.m.s. radii of 17 B (2.99±0.09 fm) and of 14 Be (3.10±0.15 fm) in this work are consistent with the previously determined values, and have a higher accuracy. The r.m.s. radius of 19 B (3.11±0.13 fm) was newly determined. Assuming a “core plus 2n” structure in 17 B and 14 Be, the mixing of ν (2 s 1/2 ) and ν (1 d 5/2 ) was studied and the s -wave spectroscopic factor is found to be 36±19% and 47±25%, respectively. A valence radius analysis suggests a “core plus 4n” structure in 19 B.

Published
1999

7. Neutron pre-emission at the fusion of 11Li halo nuclei with Si targets

Author

A. Isbasescu, S. Fukuda, I. David, M. Giurgiu, Koichi Yoshida, T. Kobayashi, G. Vaman, Sadao Momota, A.A. Korsheninnikov, I. Lazar, H. Petrascu, A. Ozawa, H. Kumagai, M. Petrascu, C. Bordeanu, I. Tanihata, E. Nikolski, and I. Mihai

Subjects
Bonner sphere, Physics, Nuclear and High Energy Physics, Range (particle radiation), Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Neutron stimulated emission computed tomography, Monte Carlo method, Neutron scattering, Nuclear physics, Neutron cross section, Neutron, Halo, Atomic physics, Nuclear Experiment
Abstract

The fusion of 9,11 Li ( E = 11.2–15.2A MeV) with Si targets has been investigated in an inclusive approach. The neutron spectra in the energy range 0.5–22.5 MeV, corresponding to 9 Li and 11 Li projectiles, have been measured with the aid of the RIKEN “long neutron wall”. In the case of 9 Li, the neutron spectrum is in good agreement with the Monte Carlo calculated fusion-evaporation spectrum. In the case of 11 Li, the neutron spectrum is showing that an important number of fusions (33 ± 10) %, are preceded by the pre-emission of one or two halo neutrons.

Published
1997

8. Scattering of radioactive nuclei 6He and 3H by protons: Effects of neutron skin and halo in 6He, 8He, and 11Li

Author

E. Yu. Nikolskii, E. A. Kuzmin, Koichi Yoshida, Isao Tanihata, B. G. Novatskii, A. A. Ogloblin, Sadao Momota, V. Pribora, S. Fukuda, T. Kobayashi, A. Ozawa, Carlos A. Bertulani, and A.A. Korsheninnikov

Subjects
Elastic scattering, Physics, Nuclear reaction, Nuclear and High Energy Physics, Proton, Scattering, Nuclear Theory, Neutron scattering, Inelastic scattering, Small-angle neutron scattering, Nuclear physics, Neutron, Atomic physics, Nuclear Experiment
Abstract

In an experimental study of 6He+p and 3H+p collisions at ∼70 A MeV, the elastic scattering angular distributions were measured and the known excited state 6He1.8∗ was observed. Comparative analysis of existing experimental data on proton elastic scattering by 4He, 6He, 6Li, 8He, 9Li, and 11Li was performed. Effects of valence neutrons were investigated using the eikonal approach. A difference between 11Li and 6,8He was found.

Published
1997

9. Elastic and inelastic scattering of exotic nuclei

Author

T. Kobayashi, A.A. Korsheninnikov, B. G. Novatskii, Carlos A. Bertulani, A. Ozawa, A. A. Ogloblin, E. Yu. Nikolskii, E. A. Kuzmin, Koichi Yoshida, Sadao Momota, V. Pribora, Isao Tanihata, O. V. Bochkarev, and S. Fukuda

Subjects
Physics, Elastic scattering, Nuclear and High Energy Physics, Quasielastic scattering, X-ray Raman scattering, Quasielastic neutron scattering, Neutron, Inelastic scattering, Atomic physics, Spectroscopy
Abstract

Experimental studies of 11 Li+p, 8 He+p, 6 He+p, 3 H+p, and 14 Be+p at E ∼ 65–75 A MeV are reported. The elastic scattering cross sections are measured. Effects of extended neutron distributions in 11 Li, 8 He, 6 He are investigated. Spectroscopy of 11 Li, 6 He, 14 Be is performed.

Published
1997

10. L=1Excitation in the Halo Nucleus11Li

Author

A.A. Korsheninnikov, T. Kobayashi, Koichi Yoshida, V. Pribora, S. Fukuda, A. Ozawa, S. A. Goncharov, Sadao Momota, E. A. Kuzmin, B. G. Novatskii, E. Yu. Nikolskii, Isao Tanihata, O. V. Bochkarev, A. A. Ogloblin, and S. Ito

Subjects
Physics, Dipole, Angular distribution, Excited state, General Physics and Astronomy, Halo nucleus, Atomic physics, Nuclear Experiment, Ground state, Spectroscopy, Excitation
Abstract

Collisions of ${}^{11}\mathrm{Li}+p$ at $68A\mathrm{MeV}$ have been studied by correlational measurements. An excited state of ${}^{11}\mathrm{Li}$ at ${E}^{*}\ensuremath{\simeq}1.3\mathrm{MeV}$ was observed. The measured angular distributions show the dipole nature of the excitation of the 1.3-MeV peak. The structure of the excited states and the ground state of ${}^{11}\mathrm{Li}$ is discussed.

Published
1997

11. Nuclear structure studies of very neutron-rich isotopes of 7–10He, 9–11Li and 12–14Be via two-body reactions

Author

Th. Stolla, Alexander Ostrowski, W. von Oertzen, M. von Lucke-Petsch, H. G. Bohlen, B. Gebauer, Ch. Seyfert, I.G. Mukha, Thomas N. Massey, Y. E. Penionzhkevich, M. Wilpert, S. Piskor, A.A. Korsheninnikov, R. Kalpakchieva, Steven M. Grimes, D.V. Alexandrov, A. A. Ogloblin, and Th. Wilpert

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Isotope, Fragmentation (mass spectrometry), Excited state, Nuclear Theory, Nuclear structure, Neutron, Nuclear Experiment, Quantum number, Spectral line, Excitation
Abstract

A considerable number of experiments is nowadays devoted to the study of "exotic nuclei", mainly by using secondary beams produced by high energy fragmentation of heavier nuclei. In these eases mainly the properties of the bound nuclei (usually ground states) are accessible. In the studies persued at the HMI various two-body reactions populating bound and unbound states have been studied using beams of 13C and 14C of typically 24 MeV/nueleon and neutron-rich targets [ 1-3]. The energy spectrum of excited states (resonances) in exotic nuclei is thus obtained and the width of resonances gives an indirect information for the assignment of quantum numbers. We have focussed our attention to the light neutron rich isotopes of He, Li, Be and B. Some of the isotopes for which we have obtained results are marked in Fig. 1. The excitation energy spectra of these nuclei will reflect the particular deviations from the standard shell model which are often discussed in neutron rich nuclei [4-6].

Published
1995

12. Spectroscopy of 12Be and 13Be using a 12Be radioactive beam

Author

Y. X. Watanabe, Koichi Yoshida, T. Kobayashi, H. Kumagai, Isao Tanihata, E. Yu. Nikolskii, A.A. Korsheninnikov, A. Ozawa, A. A. Ogloblin, Dmitry Aleksandrov, and M. Fujimaki

Subjects
Physics, Nuclear and High Energy Physics, Cluster (physics), Atomic physics, Inelastic scattering, Spectroscopy, Astrophysics::Galaxy Astrophysics, Radioactive beam
Abstract

We have studied 12 Be + p elastic and inelastic scattering and observed new levels of 12 Be at E 12 Be ∗ = 8.6, 10 and ∼ 14 MeV in the vicinity of He-emission thresholds, which can be candidates for states having an exotic cluster structure with He-like subsystems. Some new states were tentatively assigned to 13 Be in studies of the d( 12 Be, p) reaction.

Published
1995

13. Observation of 10He

Author

S. Shimoura, Y. Doki, Isao Tanihata, M.M. Obuti, Koichi Yoshida, Naohito Inabe, T. Kobayashi, N. Aoi, A. A. Ogloblin, Dmitry Aleksandrov, M. Yanokura, M. Fujimaki, E. Yu. Nikolskii, A.A. Korsheninnikov, H. Kumagai, Takashi Suzuki, Y. X. Watanabe, A. Ozawa, and Chang-Bum Moon

Subjects
Triple coincidence, Physics, Nuclear physics, Nuclear and High Energy Physics, Mass spectrum, Resonance, Neutron, Atomic physics, Nuclear Experiment, Beam energy
Abstract

The reactions 11 Li + CD 2 → 10 He + X and 11 Li + C → 10 He + X at a beam energy of 61A MeV have been studied by measuring the triple coincidence of 8He and two neutrons. Experimental data show a peak that can be explained as a resonance 10He, which is unbound by 1.2±0.3 MeV and its width is less than 1.2 MeV. Theinvariant mass spectra of 8He+n show a peak that is consistent with the decay 10 He → 8 He + n + n .

Published
1994

14. The electronion scattering experiment ELISe at the International Facility for Antiproton and Ion Research (FAIR) - A conceptual design study

Author

E. Garrido, Igor Meshkov, E. Khan, Pedro Sarriguren, B. Franzke, A. Chatillon, Marielle Chartier, M. Aiche, D. Doré, B. Jurado, Dirk Rudolph, I.A. Koop, S. N. Ershov, M. Fujiwara, Mikhail V. Zhukov, Roy Crawford Lemmon, R. Johnson, S. A. Krupko, D. N. Kadrev, S. Karataglidis, Yurii M. Shatunov, G. Belier, Thomas Nilsson, Oliver Kester, C. Schmitt, C. Fernandez Ramirez, E. Moya de Guerra, Norbert Pietralla, S. Czajkowski, F. Nolden, M. K. Gaidarov, Thomas Rauscher, G. P. A. Berg, E. Berthoumieux, Harald Merkel, D. Ridikas, I. Seleznev, Achim Richter, Andreas Zilges, F. Farget, A. Kelic-Heil, J. A. Caballero, L. V. Chulkov, Tatuya Adachi, V. Lisin, Helmut Weick, H. Lenske, Håkan T Johansson, Kai Hencken, Anton Nikolaev Antonov, K.-H. Schmidt, B. Krusche, A.A. Korsheninnikov, A. M. Rodin, Björn Jonson, Y. Litvinov, A.V. Otboev, P. Beller, Nasser Kalantar-Nayestanaki, U. Müller, Ch. Scheidenberger, L. V. Grigorenko, A. Dolinskii, N. Kurz, D. G. Jenkins, Laurent Tassan-Got, Pavel Golubev, N. V. Rudnev, Thomas Aumann, Andreas Martin Heinz, Seigo Kato, J. Taieb, A.N. Skrinsky, R. Alvarez Rodriguez, W. N. Catford, M. J. G. Borge, A. A. Ogloblin, J. Jourdan, A. V. Gorshkov, G. Münzenberg, Elena Litvinova, A. Letourneau, Takeshi Suda, A. Artukh, B. V. Danilin, G. Schrieder, A.N. Vorontsov, G. M. Ter-Akopian, P.V. Logatchov, D.I. Shvartz, S. Hamieh, K. Boretzky, Sergei Kamerdzhiev, A. N. Mushkarenkov, C. J. Barton, Peter Egelhof, Jim Al-Khalili, H. Emling, Paul Stevenson, Carlos A. Bertulani, Arnd R. Junghans, D. M. Cullen, E. Dupont, Dirk Trautmann, Joachim Enders, M. Steck, J. Udias-Moinelo, L.M. Fraile Prieto, M. O. Distler, Vasilii V. Parkhomchuk, Mohsen Harakeh, Göran Hugo Nyman, M. V. Ivanov, Vladimir Avdeichikov, Stefano Panebianco, Y. Sereda, J.E. Amaro Soriano, S.V. Shiyankov, D. Kiselev, A. S. Fomichev, E. Syresin, Hans Geissel, V. Volkov, L. Audouin, E. A. Kuzmin, Y. Teterev, S. Klygin, A. Polonski, A. A. Turinge, S. I. Sidorchuk, T. Granier, H. J. Wörtche, V. G. Nedorezov, P.Y. Shatunov, J. R. Vignote, J. Lopez Herraiz, A.M. Lallena Rojo, D.N. Shatilov, Haik Simon, Y. Grishkin, G. Barreau, S. V. Stepantsov, M. S. Golovkov, Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), KVI - Center for Advanced Radiation Technology, Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Nuclear and High Energy Physics, electronscattering, FORM-FACTORS, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Electron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], DATA-ACQUISITION SYSTEM, NUCLEAR-STRUCTURE, 01 natural sciences, BINDING-ENERGIES, CHARGE-DENSITY DISTRIBUTIONS, Ion, CROSS-SECTIONS, Nuclear physics, Nuclei far off stability, Conceptual design, eA collider, 0103 physical sciences, CENTRAL DEPRESSION, Electron scattering, 010306 general physics, Instrumentation, Physics, 010308 nuclear & particles physics, Scattering, 29.27.-a, 25.30.Bf,25.30.Dh,21.10.Ft,29.20.Dh,29.30.-h, RELATIVISTIC HEAVY-IONS, EXOTIC NUCLEI, Facility for Antiproton and Ion Research, GIANT-RESONANCES, Storage ring
Abstract

The electronion scattering experiment ELISe is part of the installations envisaged at the new experimental storage ring at the International Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany. It offers an unique opportunity to use electrons as probe in investigations of the structure of exotic nuclei. The conceptual design and the scientific challenges of ELISe are presented. © 2011 Elsevier B.V. All rights reserved., The authors acknowledge financial support from the EC via the INTAS pro- gramme, grants No. 03-54-6545 and 05-1000008-8272. This work was partially supported by the Hessian LOEWE initiative Helmholtz International Center for FAIR

Published
2011

15. Solution of the10Li-Puzzle

Author

B. Gebauer, D.V. Alexandrov, H. G. Bohlen, Th. Wilpert, W. von Oertzen, M. von Lucke-Petsch, A.A. Korsheninnikov, Y. E. Penionzhkevich, S. Piskor, EY Nikolskii, M. Wilpert, A. S. Demyanova, H. Lenske, A. A. Ogloblin, Alexander Ostrowski, and R. Kalpakchieva

Subjects
Physics, Nuclear and High Energy Physics, Mass excess, Mean field theory, Excited state, Pairing, Nuclear fusion, Neutron, Atomic physics, Ground state, Resonance (particle physics)
Abstract

The mass of10Li has been measured with two different reactions:9Be(13C,12N)10Li,E Lab=336 MeV, and13C(14C,17F)10Li,E Lab=337 MeV. The mass excess of 33.445(50) MeV is deduced from theQ-value measurement.10Li is found to be particle-unstable with respect to one-neutron emission by 0.42(5) MeV. In the analysis of the first reaction a low lying excited state is found at 0.38(8) MeV. This state and the ground state can be most probably identified as the 1+/2+-doublet coupled from the [π 1p3/2 ⊗ν 1p 1/2] configuration, the 1+-state being the ground state. The (13C,12N)-reaction populates the 1+-state strongly due to a spin-isospin-flip character of the dominant part of the transition amplitude. The 2+-member corresponds to the mass given by Wilcox et al. A second excited state is observed at 4.05(10) MeV with a width of 0.7(2) MeV, it can be associated with theν 1d 5/2-strength. The second reaction is fully supporting the interpretation of the ground state doublet. The excited state at 4.05 MeV is not observed in this reaction and indeed it should not, because the reaction does not populate in first order excited neutron configurations. The levels are well described by mean field calculations including pairing correlations. The lowest resonance in the calculations is theν 1/2−-configuration, whereas theν 1/2+-configuration shows at the neutron threshold a strong non-resonant contribution.

Published
1993

16. Experimental study of 8He + p elastic and inelastic scattering

Author

A.A. Korsheninnikov, Y. Doki, E. Yu. Nikolskii, S. Shimoura, Dmitry Aleksandrov, M. Fujimaki, N. Aoi, Takashi Suzuki, Y. X. Watanabe, A. Ozawa, Chang-Bum Moon, Koichi Yoshida, T. Kobayashi, M.M. Obuti, A. A. Ogloblin, H. Kumagai, Isao Tanihata, Naohito Inabe, and M. Yanokura

Subjects
Elastic scattering, Physics, Nuclear and High Energy Physics, Quasielastic scattering, Angular distribution, Excited state, Experimental methods, Inelastic scattering, Atomic physics, Inelastic neutron scattering
Abstract

An experimental study of 8He + p elastic scattering and a search for 8He∗ as observed in two independent experimental methods. The obtained parameters of the excited state are E 8 He ∗ = 3.57±0.12 MeV , Γ =0.5±0.35 MeV, Γ 4 He+4n /Γ 6 He+n+n ⩽ 5% . Angular distributions for elastic and inelastic scattering are measured. The inelastic angular distribution is consistent with Jπ = 2+ for 8He3.55∗.

Published
1993

17. Rainbow scattering of radioactive nuclei and the isospin dependence of the nucleus-nucleus potential

Author

Ch. Langner, H. G. Bohlen, M. Wilpert, S. A. Goncharov, W. von Oertzen, M. von Lucke-Petsch, A. S. Demyanova, Alexander Ostrowski, B. Gebauer, A.A. Korsheninnikov, Th. Wilpert, A. A. Ogloblin, and O. Ya Osadchy

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, medicine.anatomical_structure, Scattering, Isospin, medicine, Rainbow, Nucleus
Published
1993

18. Soft Dipole Mode in $^{8}$He

Author

B. G. Novatskii, M. S. Golovkov, S. A. Krupko, W. Mittig, R. S. Slepnev, E. Yu. Nikolskii, D. N. Stepanov, S. V. Stepantsov, Dan-Yang Pang, A.A. Korsheninnikov, Alain Ninane, V. A. Gorshkov, S. I. Sidorchuk, A. A. Yukhimchuk, S. V. Zlatoustovskiy, V. V. Perevozchikov, Yu. Ts. Oganessian, P. Roussel-Chomaz, L. Stuttge, S. K. Grishechkin, G.M. Ter-Akopian, L. V. Grigorenko, E. A. Kuzmin, R. Wolski, Yu. I. Vinogradov, V. Chudoba, A. M. Rodin, A. S. Fomichev, F. Hanappe, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département Recherches Subatomiques (DRS-IPHC), Institut Pluridisciplinaire Hubert Curien (IPHC), and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, education.field_of_study, Radiation, 25.60.Je, 21.60.Gx, Population, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Atomic and Molecular Physics, and Optics, Dipole excitation, Dipole mode, Excited state, Radiology, Nuclear Medicine and imaging, Atomic physics, Ground state, education
Abstract

The low-lying spectrum of 8 He was studied in the 3 H( 6 He, p ) 8 He transfer reaction for small center of mass angles. The 0 + ground state (g.s.) of 8 He and excited states, 2 + at 3.6–3.9 MeV and (1 + ) at 5.3–5.5 MeV, were populated with cross sections of 200, 100–250, and 90–125 μ b/sr. Some evidence for the excited state at about 7.5 MeV can be found in the data. The possible nature of the near-threshold anomaly above 2.14 MeV in 8 He is related to the population of a 1 – continuum (soft dipole excitation) with a peak energy value at about 3 MeV. This assumption can probably resolve the problem of a large uncertainty existing in the experimental data on the 8 He 2 + state energy.

Published
2009

19. Properties of very n-rich He isotopes

Author

S. K. Grishechkin, Yu. Ts. Oganessian, E. A. Kuzmin, L. Stuttge, A. M. Rodin, E. Yu. Nikolskii, A. S. Fomichev, V. A. Gorshkov, R. S. Slepnev, B. G. Novatskii, Yu. I. Vinogradov, Dan-Yang Pang, S. V. Zlatoustovskiy, A. A. Yukhimchuk, R. Wolski, Alain Ninane, P. Roussel-Chomaz, F. Hanappe, L. V. Grigorenko, M. S. Golovkov, W. Mittig, S. A. Krupko, D. N. Stepanov, G.M. Ter-Akopian, S. V. Stepantsov, V. V. Perevozchikov, S. I. Sidorchuk, V. Chudoba, A.A. Korsheninnikov, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Physics, Nuclear and High Energy Physics, education.field_of_study, 010308 nuclear & particles physics, Properties of specific nuclei listed by mass ranges: A ≤ 5, Hadron, Population, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Spectral line, Dipole, Reactions induced by unstable nuclei, Transfer reactions, Excited state, 0103 physical sciences, Nuclear fusion, Atomic physics, 010306 general physics, Ground state, education, 25.60.-t, 25.60.Je, 27.10.+h, Excitation
Abstract

Low-energy spectra of the He-8,He-10 nuclei were investigated in the (t, p)-type reactions at small centre-of-mass angles using similar to 25AMeV beams of He-6 and He-8 nuclei. The 0(+) ground state (g.s.) of He-8 and excited states, 2(+) at 3.6-3.9MeV and (1(+)) at 5.3-5.5 MeV, were populated with cross-sections of 200, 100-250, and 90-125 mu b/sr, respectively. To account for a near-threshold anomaly observed in the He-8 spectrum the population of a 1(-) continuum (soft dipole excitation) was considered. The lowest-energy group of events in the He-10 spectrum was observed at similar to 3MeV with a cross-section of similar to 140 mu b/sr. This result is consistent with the previously reported observation of He-10 providing a new g.s. position for He-10 at about 3MeV.

Published
2008

20. Quest for the $^{10}$He nucleus

Author

A. M. Rodin, A. S. Fomichev, V. A. Kuzmin, S. V. Stepantsov, A. V. Gorshkov, A.A. Korsheninnikov, E. Yu. Nikolskii, S. A. Krupko, Yu. Ts. Oganessian, F. Hanappe, D. N. Stepanov, B. G. Novatskii, O. Dorvaux, V. Bouchat, M. S. Golovkov, L. Stuttge, V. A. Gorshkov, V. Kinnard, S. I. Sidorchuk, R. S. Slepnev, V. Chudoba, G.M. Ter-Akopian, W. Mittig, P. Roussel-Chomaz, R. Wolski, Th. Materna, L. V. Grigorenko, Joint Institute for Nuclear Research (JINR), RIKEN Nishina Center for Accelerator-Based Science [Wako] (RIKEN RNC), RIKEN - Institute of Physical and Chemical Research [Japon] (RIKEN), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Joint Institute for Nuclear Research - Dubna, RIKEN Nishina Center (for Accelerator-Based Science), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Resolution (mass spectrometry), 010308 nuclear & particles physics, General Physics and Astronomy, Resonance, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Coincidence, Nuclear physics, medicine.anatomical_structure, 0103 physical sciences, Mass spectrum, medicine, General Materials Science, Center of mass, Physical and Theoretical Chemistry, Atomic physics, 010306 general physics, Nuclear Experiment, Nucleus
Abstract

The spectrum of $\rm ^He$ was studied by means of the $\rm ^He, p)^He$ reaction at a laboratory energy of 25 $\rm MeV/A$ and small center-of-mass angles. Missing mass spectrum of $\rm ^He$ was derived from the obtained p-8He coincidence. A resolution of 0.7 MeV was achieved in this spectrum for the measured $\rm ^He$ energy. Most likely, a well isolated group of 10 events detected between 2 and 5 MeV and showing a maximum at about 3 MeV in the spectrum of the present work exhibits the $\rm ^He$ g.s. resonance.

Published
2008

21. Correlation studies of theH5spectrum

Author

A. A. Yukhimchuk, S. K. Grishechkin, V. Bouchat, S. V. Zlatoustovskiy, R. Raabe, A. M. Rodin, L. V. Grigorenko, A. S. Fomichev, O. Dorvaux, A. A. Bogatchev, S. A. Krupko, L. Nalpas, Yu. I. Vinogradov, E. Yu. Nikolskii, R. S. Slepnev, R. Wolski, W. Mittig, Th. Materna, F. Hanappe, S. V. Stepantsov, R. Palit, M. S. Golovkov, M. G. Itkis, P. Roussel-Chomaz, N. A. Kondratiev, A.A. Korsheninnikov, G.M. Ter-Akopian, V. V. Perevozchikov, L. Stuttge, Yu. Ts. Oganessian, E. M. Kozulin, A. S. Denikin, V. Lapoux, C. Angulo, S. I. Sidorchuk, and V. Kinnard

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, education.field_of_study, 010308 nuclear & particles physics, Population, Hadron, 01 natural sciences, 7. Clean energy, Spectral line, Excited state, 0103 physical sciences, Mass spectrum, Atomic physics, 010306 general physics, Ground state, education, Nucleon
Abstract

The nuclear system {sup 5}H was studied using the {sup 3}H(t,p){sup 5}H transfer reaction at a laboratory energy of 57.7 MeV and small center of mass angles. The energy and angular correlations among the {sup 5}H decay fragments were obtained by complete kinematical reconstruction. A broad structure in the {sup 5}H missing mass spectrum above 2.5 MeV with a typical width of several MeV was identified as a mixture of 3/2{sup +} and 5/2{sup +} states. Analysis of interference patterns observed in the measured angular correlations disclosed the 1/2{sup +} ground state of {sup 5}H concealed in the smooth missing mass spectrum. The deduced values for the resonance energy and width are E{sub g.s.}{approx_equal}1.8 MeV and {gamma}{sub g.s.}{approx_equal}1.3 MeV. The estimated cross sections for population of the ground state and the doublet of excited states at {theta}{sub c.m.}=5 deg. are 150{+-}50 {mu}b/sr and 4.6{+-}2 mb/sr, respectively.

Published
2005

23. New insights into the resonance states of $^{5}$H and $^{5}$He

Author

A. A. Yukhimchuk, F. Hanappe, S. V. Stepantsov, Yu. I. Vinogradov, S. V. Zlatoustovskiy, M. S. Golovkov, E. Yu. Nikolskii, V. Bouchat, R. Palit, V. V. Perevozchikov, S. K. Grishechkin, R. Raabe, Yu. Ts. Oganessian, A. M. Rodin, L. Nalpas, A. S. Fomichev, A.A. Korsheninnikov, G.M. Ter-Akopian, O. Dorvaux, S. A. Krupko, L. V. Grigorenko, P. Roussel-Chomaz, R. Wolski, Th. Materna, V. Lapoux, C. Angulo, V. Kinnard, L. Stuttge, W. Mittig, R. S. Slepnev, S. I. Sidorchuk, RIKEN Nishina Center for Accelerator-Based Science [Wako] (RIKEN RNC), RIKEN - Institute of Physical and Chemical Research [Japon] (RIKEN), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), C. Gross, W. Nazarewicz, K. Rykaczewski, Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and RIKEN Nishina Center (for Accelerator-Based Science)

Subjects
Physics, Nuclear and High Energy Physics, Ion beam, 010308 nuclear & particles physics, Hadron, Nuclear reactions involving few-nucleon systems, 25.10.+s, 25.60.-t, 25.60.Je, 27.10.+h, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Deuterium, Reactions induced by unstable nuclei, Transfer reactions, Properties of specific nuclei listed by mass ranges: A≤5, 0103 physical sciences, Nuclear fusion, Tritium, Atomic physics, 010306 general physics, Ground state, Excitation, Beam (structure)
Abstract

International audience; The $^{5}$H system was produced in the $^{3}$H(t, p) $^{5}$H reaction studied at small CM angles with a 58MeV tritium ion beam. High statistics data were used to reconstruct the energy and angular correlations between the $^{5}$H decay fragments. A broad structure in the $^{5}$H missing-mass spectrum showing up above 2.5MeV was identified as a mixture of the $3/2^+$ and $5/2^+$ states. The data also present an evidence that the $1/2^+$ ground state of $^{5}$H is located at about 2MeV. Then, the $^{5}$H and $^{5}$He systems were explored by means of transfer reactions occurring in the interactions of 132MeV $^{6}$He beam nuclei with deuterium. In the $^{2}$H( $^{6}$He, $^{3}$H) reaction a T = 3/2 isobaric analog state of $^{5}$H in $^{5}$He was observed at an excitation energy of 22.0±0.3MeV with a width of 2.5±0.3MeV.

Published
2004

24. Experimental study of $^{4}$H in the reactions $^{2}$H(t,p) and $^{3}$H(t,d)

Author

M. S. Golovkov, S. I. Sidorchuk, Yu. Ts. Oganessian, Yu. I. Vinogradov, Alain Ninane, E. Yu. Nikolskii, R. Wolski, L. Stuttge, A. A. Yukhimchuk, Th. Materna, W. Mittig, A.A. Korsheninnikov, F. Hanappe, P. Roussel-Chomaz, S. V. Stepantsov, V. V. Perevozchikov, R. S. Slepnev, G.M. Ter-Akopian, D. D. Bogdanov, A. M. Rodin, A. S. Fomichev, RIKEN Nishina Center for Accelerator-Based Science [Wako] (RIKEN RNC), RIKEN - Institute of Physical and Chemical Research [Japon] (RIKEN), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and RIKEN Nishina Center (for Accelerator-Based Science)

Subjects
Physics, inorganic chemicals, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Scattering, technology, industry, and agriculture, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Resonance (particle physics), 27.10.+h, 25.60.Je, Nuclear physics, Recoil, Deuterium, 0103 physical sciences, cardiovascular system, polycyclic compounds, Tritium, Neutron, lipids (amino acids, peptides, and proteins), 010306 general physics, Beam (structure), S-matrix
Abstract

The H-4 resonance was investigated in the transfer reactions H-2(t,p)H-4 and H-3(t,d)H-4 using cryogenic liquid targets of deuterium and tritium and 58 MeV triton beam. The multidetector system with a large angular acceptance was used to measure the recoil protons and deuterons in coincidences with tritons or neutrons from the decay of H-4. Data analysis involved careful considerations made for the competing processes of final state interaction and quasifree scattering. The experimental data show a peak with resonance parameters E-res = 3.05 +/- 0.19 MeV and Gamma(obs) = 4.18 +/- 1.02 MeV. The pole of S-matrix corresponding to the physical values of energy and width, E-0 = 1.99 +/- 0.37 MeV and Gamma(0) = 2.85 +/- 10.3 MeV, has been extracted. (C) 2004 Elsevier B.V. All rights reserved.

Published
2004

25. Evidences for resonances states in $^{5}$H

Author

A. M. Rodin, A. S. Fomichev, S. K. Grishechkin, Yu. I. Vinogradov, M. G. Itkis, S. V. Zlatoustovskiy, N. Alamanos, F. Hanappe, A. M. Demin, A. A. Yukhimchuk, G.M. Ter-Akopian, A. V. Kuryakin, Alain Ninane, Yu. Ts. Oganessian, A.A. Korsheninnikov, M. S. Golovkov, E. M. Kozulin, A. A. Bogatchev, E. C. Pollacco, E. Yu. Nikolskii, M. L. Chelnokov, S. V. Stepantsov, R.I Il'kayev, L. Nalpas, V. V. Perevozchikov, I. V. Korzyukov, N. A. Kondratiev, P. Roussel-Chomaz, R. Wolski, Th. Materna, V. Lapoux, L. Stuttge, W. Mittig, R. S. Slepnev, Isao Tanihata, V. A. Gorshkov, S. I. Sidorchuk, S. V. Filchagin, D. D. Bogdanov, Grand Accélérateur National d'Ions Lourds (GANIL), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Triple coincidence, Physics, Nuclear and High Energy Physics, Proton, Nuclear Theory, Two-neutron transfer reaction, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Resonance (particle physics), Physique atomique et nucléaire, Nuclear physics, Mass spectrum, Physics::Accelerator Physics, Neutron, Tritium, Tritium target, Atomic physics, Tritium beam, Nuclear Experiment, Beam (structure)
Abstract

Resonance states of 5H were investigated through the two-neutron transfer reaction t(t, p)5 H. A triton beam at 57.5 MeV and a cryogenic liquid tritium target were used. The 5H missing mass spectrum in triple coincidence, proton + triton + neutron, shows a resonance at 1.8 ± 0.1 MeV above the t + 2n decay threshold. This energy is in good agreement with the result reported in Phys. Rev. Lett. 87 (2001) 092501. The resonance width, Γintr ≤ 0.5 MeV, is surprisingly small and difficult to reconcile with theory predictions. © 2003 Published by Elsevier B.V., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2003

26. Nuclear radii of

Author

M. Hellström, H. Geissel, Toshio Kobayashi, A.A. Korsheninnikov, O. V. Bochkarev, I. Tanihata, B. Sitar, P. Strmeň, G. Münzenberg, R. Janik, H. Simon, F. Nickel, V. Pribora, M. Pfützner, M. Winkler, A. Ozawa, K. Kimura, T. Suzuki, K. Sümmerer, D. Cortina, M. Ivanov, A. A. Ogloblin, K. Yoshida, and L. V. Chulkov

Subjects
Physics, Nuclear Theory, Nuclear structure, Charge density, chemistry.chemical_element, Radius, Nuclear physics, chemistry, Neutron cross section, Neutron, Halo, Nuclear drip line, Beryllium, Atomic physics, Nuclear Experiment
Abstract

The interaction cross-sections (σI) of light radioactive nuclei close to the neutron drip line (17,19B, 14Be) have been measured at around 800 A MeV. The effective mean-square-matter radii of these nuclei have been deduced from σI by a Glauber-type calculation. A large increase in the radius from 15B to 17B has been observed. A similar rate of increase is seen in 17B to 19B and in 12Be to 14Be. Questions concerning the neutron halo structure in 17,19B are discussed.

Published
1998

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