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1. Measurements of the total-cross-section difference Δσ L(np) at 1.39, 1.69, 1.89, and 1.99 GeV

Author

F. Lehar, A. A. Lukhanin, A. L. Svetov, M. FingerJr., N. G. Anischenko, N. A. Bazhanov, G. P. Nikolaevsky, A.A. Zhdanov, P. K. Maniakov, V. P. Ladygin, A. D. Kirillov, I. P. Yudin, Alexander Fedorov, V.F. Chumakov, A. A. Nomofilov, R. A. Shindin, T. A. Vasiliev, Vladislav Sharov, O. N. Schevelev, A. B. Neganov, Yu. A. Plis, A. Janata, E. V. Chernykh, A.N. Livanov, L. B. Golovanov, G. M. Gurevich, N. S. Borisov, V.I. Volkov, Yu. P. Polunin, A. A. Morozov, M. Finger, V. A. Krasnov, V. Yu. Prytkov, V. Slunečková, E. I. Vorobiev, V. G. Kolomiets, N.A. Blinov, I.L. Pisarev, V. A. Schedrov, L. P. Chernenko, I.V. Zaitsev, E.V. Komogorov, S. B. Borzakov, V.D. Moroz, L. S. Azhgirey, A. N. Prokofiev, Alexander Kovalenko, G.D. Stoletov, A. de Lesquen, S.A. Averichev, V.N. Matafonov, A.I. Kovalev, S.A. Dolgii, Yu. K. Pilipenko, A.A. Belyaev, Yu. T. Borzunov, L. N. Strunov, V. V. Fimushkin, V.D. Bartenev, S. N. Shilov, A. B. Lazarev, M. Slunecka, Yu. P. Bushuev, A.Yu. Starikov, Yu. A. Usov, P. Krstonoshich, E. S. Kuzmin, M.Yu. Liburg, V.G. Antonenko, P. A. Rukoyatkin, V. N. Zhmyrov, E. A. Matyushevsky, and Tz. Panteleev

Subjects
Physics, Nuclear and High Energy Physics, Nuclotron, Proton, Hadron, Neutron radiation, Kinetic energy, Atomic and Molecular Physics, and Optics, law.invention, Nuclear physics, law, Neutron, Synchrophasotron, Nuclear Experiment, Nucleon
Abstract

New accurate data of the neutron-proton spin-dependent total-cross-section difference ΔσL(np) at the neutron-beam kinetic energies 1.39, 1.69, 1.89, and 1.99 GeV are presented. In general, these data complete the measurements of energy dependence of ΔσL(np) over the Dubna Synchrophasotron energy region. Measurements were carried out at the Synchrophasotron of the Veksler and Baldin Laboratory of High Energies of the Joint Institute for Nuclear Research. The quasi-monochromatic neutron beam was produced by breakup of extracted polarized deuterons. The deuteron (and hence neutron) polarization direction was flipped every accelerator burst. The initial transverse (with respect to beam momentum) neutron polarization was changed to a longitudinal one and longitudinally polarized neutrons were transmitted through the large proton longitudinally polarized target. The target polarization direction was inverted after one to two days of measurements. Four different combinations of the beam and target parallel and antiparallel polarization directions, both oriented along the neutron-beam momentum, were used at each energy. A fast decrease in −ΔσL(np) with increasing energy above 1.1 GeV and a structure in the energy dependence around 1.8 GeV, first observed from our previous data, seem to be well revealed. The new results are also compared with model predictions and with phase-shift analysis fits. The ΔσL quantities for isosinglet state I = 0, deduced from the measured ΔσL(np) values and known ΔσL(pp) data, are also given. The results of the measurements of unpolarized total cross sections σ0tot(np) at 1.3, 1.4, and 1.5 GeV and σ0tot(nC) at 1.4 and 1.5 GeV are presented as well. These data were obtained using the same apparatus and high-intensity unpolarized deuteron beams extracted either from the Synchrophasotron or from the Nuclotron.

Published
2005

2. Single-spin asymmetry of inclusive neutral-pion production in pp ↑ interactions at 70 GeV in the region −0.4 < x F < −0.1

Author

K. E. Shestermanov, A. F. Prudkoglyad, V. V. Mochalov, A.A. Derevshchikov, A.P. Meshchanin, A. B. Neganov, V.N. Matafonov, V. L. Solovianov, Yu. A. Plis, Alexander Fedorov, Yu A. Matulenko, S. B. Nurushev, Andrey Vasiliev, L. V. Nogach, P. A. Semenov, V. Yu. Khodyrev, Yu. A. Usov, A. E. Yakutin, V. N. Grishin, N. S. Borisov, A. M. Davidenko, L. F. Soloviev, Yu.M. Mel'nik, and A. A. Lukhanin

Subjects
Physics, Nuclear and High Energy Physics, Angular momentum, Particle physics, Particle properties, Meson, media_common.quotation_subject, Hadron, Elementary particle, Asymmetry, Atomic and Molecular Physics, and Optics, Nuclear physics, Pion, media_common, Boson
Abstract

For the kinematical region specified by the inequalities −0.4 < xF < −0.1 and 0.9 < pT < 2.5 GeV/c, the results are presented that were obtained by experimentally determining the single-spin asymmetry of inclusive neutral-pion production in the reaction p + p↑ → π0 + X at 70 GeV. According to these results, the asymmetry is close to zero in the region −0.2 < xF < −0.1 and grows in magnitude with decreasing xF, amounting to (−10.6 ± 3.2)% for −0.4

Published
2005

3. Measurement of the np total cross section difference $\Delta\sigma_{\mathrm L}(np)$ at 1.39, 1.69, 1.89 and 1.99 GeV

Author

Yu. A. Usov, A. L. Svetov, S.A. Dolgii, N.A. Blinov, E. V. Chernykh, G. P. Nikolaevsky, Yu. K. Pilipenko, P. Krstonoshich, S. N. Shilov, V. P. Ladygin, S. B. Borzakov, N. S. Borisov, L.P. Chernenko, E. I. Vorobiev, A. A. Morozov, L. S. Azhgirey, V. N. Zhmyrov, N. A. Bazhanov, V.I. Volkov, A.Yu. Starikov, M. Slunečka, A.A. Belyaev, A. B. Lazarev, F. Lehar, Vladislav Sharov, A.A. Zhdanov, A. A. Lukhanin, Yu. T. Borzunov, P. K. Maniakov, V. G. Kolomiets, L. B. Golovanov, I.V. Zaitsev, T. Vasiliev, Tz. Panteleev, A. de Lesquen, V.D. Moroz, G. D. Stoletov, Alexander Fedorov, A. N. Prokofiev, E. S. Kuzmin, A.I. Kovalev, N. G. Anischenko, L. N. Strunov, Yu. A. Plis, M. Finger, A. Janata, Alexander Kovalenko, V. V. Fimushkin, A. A. Nomofilov, Yu. P. Polunin, R. A. Shindin, V. Slunečková, S.A. Averichev, V.N. Matafonov, A. B. Neganov, V.G. Antonenko, P. A. Rukoyatkin, G. M. Gurevich, I.L. Pisarev, E. A. Matyushevsky, I. P. Yudin, Yu.P. Bushuev, E.V. Komogorov, V. A. Schedrov, V. A. Krasnov, A. D. Kirillov, V.F. Chumakov, M.Yu. Liburg, O. N. Schevelev, A.N. Livanov, V. Yu. Prytkov, and V.D. Bartenev

Subjects
Physics, Particle physics, Nuclotron, Physics and Astronomy (miscellaneous), Sigma, Neutron radiation, Kinetic energy, Polarization (waves), law.invention, Nuclear physics, Deuterium, law, Neutron, Synchrophasotron, Nuclear Experiment, Engineering (miscellaneous)
Abstract

New accurate results of the neutron-proton spin-dependent total cross section difference $\Delta\sigma_{\mathrm L}(np)$ at the neutron beam kinetic energies 1.39, 1.69, 1.89 and 1.99 GeV are presented. Measurements were carried out in 2001 at the Synchrophasotron of the Veksler and Baldin Laboratory of High Energies of the Joint Institute for Nuclear Research. A quasi-monochromatic neutron beam was produced by break-up of extracted polarized deuterons. The deuteron (and hence neutron) polarization direction was flipped every accelerator burst. The vertical neutron polarization direction was rotated onto the neutron beam direction and longitudinally (L) polarized neutrons were transmitted through a large proton L-polarized target. The target polarization vector was inverted after 1-2 days of measurements. The data were recorded for four different combinations of the beam and target parallel and antiparallel polarization directions at each energy. A fast decrease of $\Delta\sigma_{\mathrm L}(np)$ with increasing energy above 1.1 GeV was confirmed. The structure in the $\Delta\sigma_{\mathrm L}(np)$ energy dependence around 1.8 GeV, first observed from our previous data, seems to be well pronounced. The new results are also compared with model predictions and with phase shift analysis fits. The $\Delta\sigma_{\mathrm L}$ quantities for isosinglet state I = 0, deduced from the measured $\Delta\sigma_{\mathrm L}(np)$ values and the known $\Delta\sigma_{\mathrm L}(pp)$ data, are also given. The results were completed by the measurements of unpolarized total cross sections $\sigma_{0\mathrm{tot}}(np)$ at 1.3, 1.4 and 1.5 GeV and $\sigma_{0\mathrm{tot}}(n$ C) at 1.4 and 1.5 GeV. These data were obtained using the same apparatus and high intensity unpolarized deuteron beams were extracted either from the Synchrophasotron, or from the Nuclotron.

Published
2004

4. Searches for single-spin asymmetry in the inclusive production of neutral pions in the central region at a proton beam energy of 70 GeV

Author

K. E. Shestermanov, A. E. Yakutin, V. L. Solovianov, Yu A. Matulenko, S. B. Nurushev, A. B. Neganov, Yu. A. Plis, L. F. Soloviev, Yu. A. Usov, V.N. Matafonov, A. P. Meschanin, A. A. Derevschikov, A. F. Prudkoglyad, Yu.M. Mel'nik, A. A. Lukhanin, L. V. Nogach, V. V. Mochalov, V. N. Grishin, Alexander Fedorov, P. A. Semenov, Andrey Vasiliev, N. S. Borisov, V. Yu. Khodyrev, and A. M. Davidenko

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Meson, Proton, media_common.quotation_subject, Hadron, Asymmetry, Atomic and Molecular Physics, and Optics, Nuclear physics, Pion, Physics::Accelerator Physics, High Energy Physics::Experiment, Fermilab, Nuclear Experiment, Nucleon, media_common
Abstract

Results are presented that were obtained by measuring single-spin asymmetry in the inclusive production of neutral pions in the reaction p+p ↑→ π0+X at xF≈0. A beam of 70-GeV protons was extracted directly from the vacuum chamber of the accelerator by means of a bent single crystal. For transverse momenta in the range 1.0

Published
2004

5. Single-spin asymmetry of inclusive π 0-meson production in 40-GeV pion interactions with a polarized target in the target-fragmentation region

Author

V.I. Kravtsov, V. L. Solovianov, V. N. Grishin, Yu.M. Mel'nik, A. A. Lukhanin, A. P. Meschanin, V. A. Medvedev, A. I. Mysnik, M. N. Ukhanov, Alexander Fedorov, Andrey Vasiliev, L. F. Soloviev, K. E. Shestermanov, Yu. A. Plis, Yu. A. Usov, Yu. V. Kharlov, A. A. Derevschikov, V. Yu. Khodyrev, L. V. Nogach, N. S. Borisov, S. B. Nurushev, V. V. Mochalov, D. A. Morozov, V.N. Matafonov, B. V. Chujko, P. A. Semenov, Yu A. Matulenko, A. E. Yakutin, A. B. Neganov, and A. F. Prudkoglyad

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Proton, Meson, media_common.quotation_subject, Hadron, Elementary particle, Asymmetry, Atomic and Molecular Physics, and Optics, Baryon, Nuclear physics, Pion, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, media_common
Abstract

Data on the single-spin asymmetry (AN) of inclusive π0 production in 40-GeV pion interactions with a polarized target, π−+↑→π0+X, are presented for the target-fragmentation region. The result is AN=(−13.8±3.8)% for −0.8

Published
2004

6. New results of ΔσL(np) at high energies

Author

G. D. Stoletov, A. B. Lazarev, F. Lehar, G. M. Gurevich, L. S. Azhgirey, A. A. Nomofilov, A. D. Kovalenko, E. A. Matyushevsky, M.Yu. Liburg, A. A. Lukhanin, A.Yu. Starikov, Yu. A. Plis, V. A. Krasnov, L. N. Strunov, A. N. Prokofiev, A. Janata, N. S. Borisov, V. V. Fimushkin, L.P. Chernenko, A. B. Neganov, V.I. Volkov, E.V. Komogorov, E. I. Vorobiev, N.A. Blinov, Yu. P. Polunin, V.D. Bartenev, V. I. Sharov, P. Krstonoshich, V. Slunečková, E. V. Chernykh, V. A. Schedrov, Yu. K. Pilipenko, V. N. Zhmyrov, V. G. Kolomiets, Alexander Fedorov, E. S. Kuzmin, A. L. Svetov, S. N. Shilov, S. B. Borzakov, Yu.P. Bushuev, V.G. Antonenko, P. A. Rukoyatkin, Yu. A. Usov, Yu.A. Shishov, G. P. Nikolaevsky, I.L. Pisarev, S. A. Kopylov, A. de Lesquen, T. Vasiliev, A. D. Kirillov, V.F. Chumakov, A.N. Livanov, S.A. Averichev, V.N. Matafonov, O. N. Schevelev, V. Yu. Prytkov, I. P. Yudin, A.A. Zhdanov, M. Finger, A.I. Kovalev, B. P. Adiasevich, A.A. Belyaev, S. A. Dolgh, N. G. Anischenko, N.A. Bazhanov, Yu. T. Borzunov, V. B. Shutov, V.P. Ladygin, P. K. Maniakov, I.V. Zaitsev, V.D. Moroz, A. A. Morozov, Tz. Panteleev, M. Slunečka, and L. B. Golovanov

Subjects
Nuclear physics, Physics, Amplitude, Forward scatter, law, General Physics and Astronomy, Synchrophasotron, law.invention
Abstract

Preliminary results of the ΔσL(np) at 1.4, 1.7, 1.9 and 2.0 GeV are presented. They were obtained during the two data-taking runs at the JINR Dubna Synchrophasotron in 2001 and complete the existing data above 1.1 GeV. The data analysis is in progress. The aim of the present studies is to determine the imaginary and real parts of the np spin-dependent forward scattering amplitudes over this energy range.

Published
2002

7. Measurements of energy behaviour of spin-dependent np observables over a GeV region. Results and prospects. Dubna 'DELTA—SIGMA' experiment

Author

Yu. K. Pilipenko, M. Finger, N.A. Bazhanov, Yu. T. Borzunov, L.P. Chernenko, E. I. Vorobiev, V. N. Zhmyrov, V. I. Sharov, L. B. Golovanov, N. I. Kochelev, Yu.P. Bushuev, V. M. Drobin, T. N. Borzunova, A.I. Kovalev, S. A. Zaporozhets, Tz. Panteleev, V.D. Bartenev, T. F. Pavlova, E. S. Kuzmin, E. V. Chernykh, S.A. Averichev, Alexander Fedorov, V. B. Shutov, F. Lehar, V.N. Matafonov, S. N. Shilov, S. B. Borzakov, A. N. Prokofiev, P. A. Rukoyatkin, A. D. Kovalenko, L. S. Azhgirey, I. P. Yudin, A.A. Zhdanov, A. A. Lukhanin, A.Yu. Starikov, I. G. Konskii, A. L. Svetov, M. Slunecka, L. N. Strunov, R. V. Polyakova, I.V. Zaitsev, V. V. Fimushkin, S.A. Dolgii, E. I. Bunyatova, P. K. Maniakov, A. de Lesquen, A. B. Lazarev, N. S. Borisov, V.I. Volkov, A. P. Dzyubak, Yu. A. Plis, V.P. Ladygin, A. Janata, T. V. Shavrina, Yu. P. Polunin, V. Slunečková, V. G. Kolomiets, Yu. A. Usov, B. A. Khachaturov, B. P. Adiasevich, V.G. Antonenko, N. G. Anischenko, E. A. Matyushevsky, V. F. Burinov, G. Durand, V. V. Orlova, A. A. Nomofilov, V. P. Yershov, A. B. Neganov, I.L. Pisarev, A. D. Kirillov, V.F. Chumakov, O. N. Schevelev, V. A. Schedrov, G. D. Stoletov, G. M. Gurevich, V. Yu. Prytkov, Yu. A. Starikov, N.A. Blinov, G. P. Nikolaevsky, and Z. P. Motina

Subjects
Physics, Particle physics, Scattering, Forward scatter, General Physics and Astronomy, Observable, Neutron radiation, Polarization (waves), Nuclear physics, Amplitude, Isospin, Physics::Accelerator Physics, Neutron, Nuclear Experiment
Abstract

New data on the spin-dependent np observables measured with quasi-monochromatic polarized neutron beam in the energy region from 1.2 to 3.7 GeV are presented. Further measurements of np scattering observables using the JINR LHE polarization facility (longitudinal and transverse polarized neutron beams and a polarized proton target) are discussed. The aim of these studies is to determine the imaginary and real parts of the forward scattering amplitudes for np and for isospin I=0 systems above 1.1 GeV.

Published
2001

8. Measurements of the np total cross section difference $\Delta \sigma_L$ at 1.59, 1.79 and 2.20 GeV

Author

V.I. Sharov, S.A. Zaporozhets, B.P. Adiasevich, N.G. Anischenko, V.G. Antonenko, L.S. Azhgirey, V.D. Bartenev, N.A. Bazhanov, N.A. Blinov, N.S. Borisov, S.B. Borzakov, Yu.T. Borzunov, L.V. Budkin, V.F. Burinov, Yu.P. Bushuev, L.P. Chernenko, E.V. Chernykh, S.A. Dolgii, V.M. Drobin, G. Durand, A.P. Dzyubak, A.N. Fedorov, V.V. Fimushkin, M. Finger, L.B. Golovanov, G.M. Gurevich, A. Janata, A.V. Karpunin, B.A. Khachaturov, A.D. Kirillov, A.D. Kovalenko, A.I. Kovalev, V.G. Kolomiets, A.A. Kochetkov, E.S. Kuzmin, V.P. Ladygin, A.B. Lazarev, F. Lehar, A. de Lesquen, A.A. Lukhanin, P.K. Maniakov, V.N. Matafonov, A.B. Neganov, M.S. Nikitina, G.P. Nikolaevsky, A.A. Nomofilov, Tz. Panteleev, Yu.K. Pilipenko, I.L. Pisarev, N.M. Piskunov, Yu.A. Plis, Yu.P. Polunin, A.N. Prokofiev, P.A. Rukoyatkin, O.N. Shchevelev, V.A. Shchedrov, S.N. Shilov, Yu.A. Shishov, V.B. Shutov, M. Slunečka, V. Slunečková, A.Yu. Starikov, G.D. Stoletov, L.N. Strunov, A.L. Svetov, A.P. Tsvinev, Yu.A. Usov, V.I. Volkov, V.P. Yershov, A.A. Zhdanov, and V.N. Zhmyrov

Subjects
Nuclear reaction, Physics, Physics and Astronomy (miscellaneous), Sigma, Kinetic energy, law.invention, Nuclear physics, Amplitude, Deuterium, law, High Energy Physics::Experiment, Neutron, Synchrophasotron, Nuclear Experiment, Engineering (miscellaneous), Beam (structure)
Abstract

New results of the neutron-proton spin-dependent total cross section difference $\Delta\sigma_L(np)$ at the neutron beam kinetic energies 1.59, 1.79 and 2.20 GeV are presented. Measurements were performed at the Synchrophasotron of the Laboratory of High Energies of the Joint Institute for Nuclear Research in Dubna. A quasi-monochromatic neutron beam was produced by break-up of extracted polarized deuterons. Neutrons were transmitted through a large polarized proton target. Measurements were performed either with a parallel or an antiparallel beam and target polarizations, both oriented along the beam momentum. The results at the two higher energies were measured with two opposite beam and target polarization directions. Only one target polarization direction was available at 1.59 GeV. The present measurements agree well with existing data. A fast decrease of the $-\Delta\sigma_L(np)$ values with increasing energy above 1.1 GeV was confirmed. The new results are also compared with model predictions and with phase shift analysis fits. The $\Delta\sigma_L$ quantities for isosinglet state I=0, deduced from the measured $\Delta\sigma_L(np)$ values and known $\Delta\sigma_L(pp)$ data, are given.

Published
2000

9. Frozen spin solid targets developed at the Laboratory of Nuclear Problems (JINR, Dubna)

Author

J. Ball, M. Vognar, Z. Janout, A. P. Dzyubak, A. B. Lazarev, V.N. Matafonov, Yu. A. Plis, G. Durand, J.-L. Sans, C. Šimane, A. B. Neganov, Alexander Fedorov, Ivan Karnaukhov, J. Cerny, A.I. Kovalev, N. A. Bazhanov, A. A. Lukhanin, F. Lehar, Yu. A. Usov, N. S. Borisov, S. N. Shilov, G. M. Gurevich, and I. Wilhelm

Subjects
Nuclear physics, Physics, Deuterium, Technical university, General Physics and Astronomy, Fermilab, Polarization (waves), Microtron, Polarized target
Abstract

Experience with polarized targets and achieving of very low temperatures gave rise to the idea of using a new technique based on dissolving 3He in 4He to create a frozen spin polarized target. The short history of the development of such proton and deuteron targets at the Laboratory of Nuclear Problems (LNP) JINR is given. Recently, the Saclay-Argonne frozen spin proton polarized target used initially in E704 experiment at FERMILAB was upgraded with adding the missing parts and the first physics experiments was carried out. At present, a new project is being proposed. The aim of this project is the development of effective methods of production 6LiD irradiated material for a large volume polarized deuteron target with a high polarization. The research will be carried out with use of the microtron of Czech Technical University for irradiation and the existing polarized target at Charles University Nuclear Centre for tests of the target materials.

Published
2000

10. Elastic and quasi-elastic pp scattering in $^6$ LiH and $^6$ LiD targets between 1.1 and 2.4 GeV

Author

V.N. Matafonov, C. E. Allgower, H. M. Spinka, J.-L. Sans, I.L. Pisarev, M. Combet, Z. Janout, R.A. Kunne, Ph. Demierre, A. de Lesquen, G. Durand, D. Grosnick, M. Beddo, J. Bystrický, D. Rapin, J. Ball, D. Lopiano, T.E. Kasprzyk, R. Hess, A. N. Prokofiev, A.A. Popov, A. A. Zhdanov, B. Vuaridel, V. V. Vikhrov, Yu. A. Usov, B.A. Khachaturov, J.M. Fontaine, V.A. Kalinnikov, and F. Lehar

Subjects
Nuclear physics, Physics, Physics and Astronomy (miscellaneous), Proton, Scattering, High Energy Physics::Experiment, Observable, Atomic physics, Polarization (waves), Engineering (miscellaneous), Polarized target
Abstract

A polarized proton beam extracted from SATURNE II, the Saclay polarized target with $^6$ Li compounds, and a $\mathrm{CH}_2$ target were used to measure elastic and quasi-elastic pp spin-dependent observables in the angular region $60^{\circ} < \theta_{\mathrm{CM}} < 105^{\circ}$ . The beam and/or target polarizations were oriented vertically. Accurate pp data for the analyzing power $A_{\mathrm{oono}}$ , spin-correlation parameter $A_{\mathrm{oonn}}$ , and the polarization transfer $K_{\mathrm{onno}}$ were measured at 1.1 GeV. The observables $A_{\mathrm{oono}}$ and $K_{\mathrm{onno}}$ were determined at six other energies between 1.6 and 2.4 GeV. At 1.6 GeV, $A_{\mathrm{oonn}}$ was also obtained. The individual contributions from H, $^6$ Li, and $^6$ LiD were deduced. The $\mathrm{CH}_2$ target provided $A_{\mathrm{oono}}(\mathrm{pp})$ results on free hydrogen and on protons in carbon. The elastic and quasi-elastic observables are compared with existing data and with phase-shift analysis predictions.

Published
1999

11. pp elastic scattering polarization transfer $K_{onno}$ and depolarization $D_{onon}$ between 1.94 and 2.80 GeV

Author

V.A. Kalinnikov, V. Ghazikhanian, Yu.M. Kazarinov, D. Rapin, Z. Janout, J.-L. Sans, F. Lehar, B. Vuaridel, J. Ball, P.-A. Chamouard, A. Boutefnouchet, D. Grosnick, A. de Lesquen, R.A. Kunne, C. E. Allgower, C. A. Whitten, A.A. Popov, I.L. Pisarev, A. N. Prokofiev, L.S. Barabash, Ph. Demierre, M. Beddo, Y. Bedfer, B.A. Khachaturov, V.N. Matafonov, Yu. A. Usov, V. V. Vikhrov, R. Hess, M. de Mali, H. M. Spinka, J. Bystrický, J.M. Fontaine, T.E. Kasprzyk, C. Lechanoine-Leluc, D. Lopiano, and A. A. Zhdanov

Subjects
Physics, Elastic scattering, Physics and Astronomy (miscellaneous), Proton, Scattering, Partial wave analysis, Phase (waves), Particle accelerator, Polarization (waves), law.invention, Nuclear physics, law, Atomic physics, Nuclear Experiment, Engineering (miscellaneous), Beam (structure)
Abstract

A polarized proton beam extracted from SATURNE II and the Saclay polarized proton target were used to measure the rescattering observables $K_{onno}$ and $D_{onon}$ at 26 energies from 1.94 to 2.80 GeV and at 0.80 GeV. The beam and target polarizations were oriented vertically and left-right as well as up-down asymmetries in the second scattering on carbon were measured. The present data, obtained in small energy steps, are practically constant as a function of energy at 90°CM, where $K_{onno} = D_{onon}$ . These data will bring about important modification to phase shifts and stabilize the solutions.

Published
1998

12. The pp elastic scattering analyzing power measured with the polarized beam and the unpolarized target between 1.98 and 2.80 GeV

Author

Yu. A. Usov, Y. Bedfer, V. Ghazikhanian, R. Hess, D. Lopiano, H. M. Spinka, A. Teglia, J. Ball, A. N. Prokofiev, P.-A. Chamouard, F. Lehar, I.L. Oisarev, M. Beddo, A. A. Zhdanov, V.N. Matafonov, V. V. Vikhrov, C. E. Allgower, A. Boutefnouchet, Z. Janout, Ph. Demierre, V.A. Kalinnikov, B. Vuaridel, J. Bystricky, A. de Lesquen, D. Rapin, T.E. Kasprzyk, C. A. Whitten, B.A. Khachaturov, J.M. Fontaine, D. Grosnick, J.-L. Sans, R.A. Kunne, and A.A. Popov

Subjects
Elastic scattering, Physics, Nuclear and High Energy Physics, Range (particle radiation), Proton, Polarimeter, Observable, Kinetic energy, Nuclear physics, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment, Beam (structure), Spin-½
Abstract

A polarized proton beam extracted from SATURNE II was scattered on an unpolarized CH2 target. The angular distribution of the beam analyzing power Aoono was measured at large angles from 1.98 to 2.8 GeV and at 0.80 GeV nominal beam kinetic energy. The same observable was determined at the fixed mean laboratory angle of 13.9° in the same energy range. Both measurements are by-products of an experiment measuring the spin correlation parameter Aoon.

Published
1998

13. Frozen spin solid targets developed at the Laboratory of Nuclear Problems (JINR, Dubna)

Author

G. M. Gurevich, S.V. Topalov, A. B. Lazarev, A. P. Dzyubak, S. N. Shilov, A. B. Neganov, A. I. Kovalev, V.N. Matafonov, Ivan Karnaukhov, Yu. A. Plis, N. A. Bazhanov, B. Benda, Yu. A. Usov, G. Durand, N. S. Borisov, A. A. Lukhanin, Alexander Fedorov, L.B. Golovanov, and F. Lehar

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Proton, Deuterium, Fermilab, Instrumentation, Spin-½, Polarized target, Magnetic field
Abstract

Experience with polarized targets [1,2] and achieving of very low temperatures in 1966 at the Laboratory of Nuclear Problems [3] and by another group [4] gave rise to the idea of using a radically new technique based on dissolving 3He in 4He to create a frozen spin polarized target. The short history of the development of such proton and deuteron targets at the LNP is given. The complex Cr(V) compounds in diols are used as target operating material. A characteristic feature of these targets is a long relaxation time (∼ 1000h) in magnetic fields of about 0.5 T. Lately, the Saclay-Argonne frozen spin proton polarized target used initially in E704 experiment at FERMILAB has been upgraded with adding the missing parts and the first physics experiment has been carried out.

Published
1998

14. Proton and neutron polarized targets for nucleon-nucleon experiments at SATURNE II

Author

J. Ball, A. Lesquen, J.-L. Sans, B. Benda, F. Lehar, Yu. A. Usov, V.N. Matafonov, P. Chaumette, J. Deregel, Z. Janout, G. Durand, C. Gaudron, T.E. Kasprzyk, M. Combet, A. P. Dzyubak, and B.A. Khachaturov

Subjects
Physics, Elastic scattering, Nuclear and High Energy Physics, Quasielastic scattering, Scattering, Nuclear Theory, Coplanarity, Polarization (waves), Small-angle neutron scattering, Nuclear physics, Neutron, Atomic physics, Nuclear Experiment, Nucleon, Instrumentation
Abstract

A SATURNE polarized target has been used for nucleon-nucleon elastic scattering and transmission experiments for 15 years. Continuous improvements resulted in a flexible and reliable facility for spin physics. The polarized proton target was a 70 cm 3 cartridge loaded with pentanol-2, a promising material according to the results obtained. The new acquisition system and data processing was based on the LabView/PC software and increased the accuracy of polarization measurements. For a polarized neutron target, two cartridges loaded with 6 LiD and 6 LiH were set in the refrigerator and could be quickly inserted in the beam. Results from the the first experiments using 6 Li materials in quasielastic pp or pn analyzing power measurements are compared with the same observables measured in free nucleon-nucleon scattering using polarized proton targets. The angular resolution distributions for θ CM determination and azimuthal coplanarity are shown for different targets in nucleon-nucleon scattering. A comparison of analyzing power results for elastic and quasielastic scattering suggests that the contribution of inelastic processes to quasielastic pn scattering may be suppressed by additional constraints.

Published
1996

15. Measurement of the total cross section differenceΔσ L innp transmission at 1.19, 2.49 and 3.65 GeV

Author

M. V. Kulikov, V. P. Yershov, T.E. Kasprzyk, A. B. Neganov, A.D. Kirillov, A. P. Tsvinev, G. M. Gurevich, A. P. Dzyubak, V. F. Burinov, J.M. Fontaine, Alexander Fedorov, G. Durand, B.A. Khachaturov, Yu. K. Pilipenko, L. S. Azhgirey, M.Yu. Liburg, V. V. Teterin, V. V. Glagolev, L.B. Golovanov, V.G. Antonenko, S. A. Zaporozhets, S.A. Dolgii, B. Benda, D. Grosnick, S. V. Mironov, N. I. Kochelev, A.A. Nomofilov, E.V. Chernykh, V. B. Shutov, E.A. Matyushevsky, P.A. Rukoyatkin, Pavel Sorokin, Yu.T. Borzunov, S.N. Shilov, D. Hill, Yu. P. Polunin, Yu. A. Plis, A.A. Zhdanov, V. V. Polyakov, A.I. Kovalev, D. Lopiano, J.-L. Sans, B. P. Adiasevich, L.N. Strunov, D. A. Ronzhin, E. I. Bunyatova, I. L. Pisarev, G. P. Nikolaevsky, Vladislav Sharov, P. K. Maniakov, F. Lehar, A. Yershov, A.L. Svetov, V. Yu. Trautman, S. V. Topalov, Yu.A. Shishov, A.Yu. Starikov, H. M. Spinka, N.A. Bazhanov, A. A. Lukhanin, E. A. Strokovsky, S.A. Averichev, N. M. Piskunov, V.N. Matafonov, A. N. Prokofiev, Alexander Kovalenko, G.M. Mgebrishvili, G.D. Stoletov, A. de Lesquen, A. V. Karpunin, A. B. Lazarev, V. V. Fimushkin, V.V. Vikhrov, Yu. A. Usov, N. S. Borisov, V.I. Volkov, J. Ball, and V. P. Ladygin

Subjects
Physics, Physics and Astronomy (miscellaneous), Proton, Neutron radiation, Kinetic energy, law.invention, Nuclear physics, Cross section (physics), law, Isospin, Neutron, Synchrophasotron, Atomic physics, Nuclear Experiment, Beam (structure)
Abstract

Results of the total cross section differenceΔσL in anp transmission experiment at 1.19, 2.49 and 3.65 GeV incident neutron beam kinetic energies are presented. Measurements were performed at the Synchrophasotron of the Laboratory of High Energies of the Joint Institute for Nuclear Research in Dubna. Results were obtained with a polarized beam of free quasi-monochromatic neutrons passing through the new Dubna frozen spin proton target. The beam and target polarizations were oriented longitudinally. The present results were obtained at the highest energies of free polarized neutrons that can be reached at present. They extend the energy range of existing results from PSI, LAMPF and Saclay measured between 0.066 and 1.10 GeV. The new results are compared withΔσL(pn) data determined as a difference betweenΔσL(pd) andΔσL(pp) ANL-ZGS measurements. The values ofΔσL for the isospin stateI=0 were deduced using knownpp data.

Published
1996

16. Observation of a narrow structure in the pp elastic scattering observable Aoonn at Tkin = 2.11 GeV

Author

J.-M. Lagniel, J.L. Lemaire, L.S. Barabash, F. Lehar, D. Lopiano, D. Rapin, A.A. Popov, J. Ball, V.N. Matafonov, P.-A. Chamouard, E.L. Lomon, J.-L. Sans, V. Ghazikhanian, A. Boutefnouchet, Yu. A. Usov, M. Beddo, A. de Lesquen, H. M. Spinka, D. Grosnick, C. A. Whitten, M. Combet, Z. Janout, Ph. Demierre, R.A. Kunne, R. Hess, M. de Mali, J. Bystricky, G. Milleret, B. Vuaridel, B.A. Khachaturov, J.M. Fontaine, V.A. Kalinnikov, Yu.M. Kazarinov, I.L. Pisarev, and T.E. Kasprzyk

Subjects
Elastic scattering, Physics, Nuclear physics, Nuclear and High Energy Physics, Angular range, Amplitude, Structure (category theory), High Energy Physics::Experiment, Observable, Absolute value, Nuclear Experiment, Kinetic energy, Spin-½
Abstract

The angular dependece of the pp elastic scattering spin correlation parameter was measured in the angular range from 60° to 97° CM at 14 energies between 1.96 and 2.23 GeV. A rapid decrease of the energy dependence of this observable at 90° CM is observed around 2.11 GeV kinetic energy. This agrees with the behavior of Aoonn predicted on the basis of an exotic six-quark structure. The Aoonn (90° CM), together with the known differential cross section, allows the determination of the absolute value of the pure spin-singlet amplitude. The energy dependence of this amplitude shows a shoulder centered at 2.11 GeV, corresponding to a total mass of 2.735 GeV and an estimated width of 17 MeV.

Published
1994

17. Observation of significant spin effects in hard collisions at 40 GeV/c

Author

Andrey Vasiliev, V.D. Apokin, L. F. Soloviev, Yu.M. Kazarinov, M.Yu. Liburg, L.N. Glonti, A.P. Meshchanin, N. S. Borisov, B. V. Chujko, A. F. Prudkogliad, N. I. Belikov, AI Ocherashvili, G.G. Macharashvili, D. I. Patalakha, Yu. Sh. Bagaturia, V. V. Mochalov, AI Mysnik, V.N. Matafonov, Yu. A. Usov, S.B. Nurushev, A.A. Derevshchikov, B.A. Khachaturov, Yu.A. Matulenko, V. L. Rykov, A.A. Morozov, V. L. Solovianov, Oleg V. Astafiev, Yu.I. Arestov, A. B. Neganov, O.A. Grachev, and TM Sakhelashvili

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Meson, Scattering, media_common.quotation_subject, Hadron, Elementary particle, Asymmetry, Nuclear physics, Pion, High Energy Physics::Experiment, Nuclear Experiment, Spin-½, media_common
Abstract

A single-spin asymmetry in the inclusive π 0 production at small x F was measured. In the experiment 40 GeV/c π − mesons were incident on transversely polarized protons and deutrons. An asymmetry of (40–50)% has been revealed in the hard scattering region.

Published
1990

18. Deuteron frozen spin polarized target for nd experiements at the VdG accelerator of Charles University

Author

J. Černý, Yu. A. Usov, I.L. Pisarev, O.O. Lukhanin, N. S. Borisov, S. N. Shilov, J. Švejda, P. Kubik, A. B. Lazarev, E. Kuzmin, Z. Doležal, V.N. Matafonov, A. A. Belyaev, M. P. Ivanov, N. A. Bazhanov, Jan Brož, I. Wilhelm, A. Fedorov, F. Lehar, A. B. Neganov, Peter Kodys, and G. M. Gurevich

Subjects
Physics, Nuclear and High Energy Physics, FOS: Physical sciences, Neutron radiation, Few-body systems, Polarization (waves), Polarized target, law.invention, Nuclear physics, Deuterium, law, Van de Graaff generator, Dilution refrigerator, Atomic physics, Nuclear Experiment (nucl-ex), Instrumentation, Nuclear Experiment
Abstract

A frozen-spin- polarized deuteron target cooled by the 3 He/ 4 He dilution refrigerator is described. Fully deuterated 1,2-propanediol was used as a target material. Deuteron vector polarization about 40% was obtained for the target in the shape of a cylinder of 2-cm diameter and 6-cm length. The target is intended for a study of 3N interactions at the polarized neutron beam generated by the Van de Graaff accelerator at the Charles University in Prague.

Published
2007
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19. Measurement of spin-dependent total cross-section difference Δσ L in neutron-proton scattering at 16 MeV

Author

J. Černý, Miloš Rotter, E. Kuzmin, A. A. Lukhanin, Yu. A. Usov, G. M. Gurevich, J. Švejda, Yu. A. Plis, M. Jirásek, Z. Doležal, V.N. Matafonov, A. B. Neganov, P. Kubik, B.A. Khachaturov, Jan Brož, I. Wilhelm, B. Sedlák, N. S. Borisov, Yu.M. Kazarinov, and I.L. Pisarev

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Proton scattering, Nuclear Theory, Nuclear fusion, Neutron, Neutron radiation, Atomic physics, Nuclear Experiment, Polarization (waves)
Abstract

A new measurement ofΔσT for polarized neutrons transmitted through a polarized proton target at 16.2 MeV has been made. A polarized neutron beam was produced with the3H(d, n)4 He reaction; proton polarization over 90% was achieved in a frozen spin target of 20 cm3 volume. The measurement yields the valueΔσT=(−126±21±14) mb. The result of a simple phase shift analysis for the3S1−3D1 mixing parameter e1 is presented and compared with the theoretical potential model predictions.

Published
1997

20. SINGLE SPIN ASYMMETRY MEASUREMENTS FOR π0 INCLUSIVE PRODUCTIONS IN p + p↑ → π0 + X AND π− + p↑ → π0 + X REACTIONS AT 70 AND 40 GeV RESPECTIVELY

Author

N. S. Borisov, Alexander Fedorov, K. E. Shestermanov, V.N. Matafonov, L. F. Soloviev, V. V. Mochalov, P. A. Semenov, S. B. Nurushev, A. M. Davidenko, Yu A. Matulenko, L. V. Nogach, Yu. A. Plis, A. P. Meschanin, A. A. Derevschikov, A. A. Lukhanin, Yu. A. Usov, V. Yu. Khodyrev, M. G. Ryskin, A. E. Yakutin, A. B. Neganov, Andrey Vasiliev, A. F. Prudkoglyad, V. N. Grishin, and Y.M. Melnick

Subjects
Physics, Particle physics, media_common.quotation_subject, Pi, Zero (complex analysis), Asymmetry, Central region, media_common, Spin-½
Abstract

The inclusive $\pi^0$ asymmetries were measured in reactions $p+p\uparrow \to \pi^0+X$ and $\pi^-+p\uparrow \to \pi^0+X$ at 70 and 40 GeV/c respectively. The measurements were made at the central region (for the first reaction) and asymmetry is compatible with zero in the entire measured $p_T$ region. For the second reaction the asymmetry is zero for small $x_F$ region ($-0.4

Published
2005

21. Dubna 'Delta-Sigma' Experiment: Results Of Treatment And Analysis Of Statistics Accumulated In 2001 Data Taking Run On Energy Dependence Of ΔσL(np)

Author

F. Lehar, N. S. Borisov, V. A. Schedrov, V. N. Zhmyrov, A.A. Nomofilov, V.I. Volkov, A.L. Svetov, V. A. Krasnov, Yu.A. Shishov, A. B. Lazarev, A. Janata, V. G. Kolomiets, E. S. Kuzmin, L.N. Strunov, P.A. Rukoyatkin, E.V. Komogorov, A. A. Morozov, E.A. Matyushevsky, M.Yu. Liburg, L.P. Chernenko, N.A. Blinov, G. P. Nikolaevsky, A.Yu. Starikov, E. I. Vorobiev, V.D. Bartenev, L.B. Golovanov, A.D. Kirillov, V. Slunečková, Yu.P. Bushuev, L. S. Azhgirey, Alexander Fedorov, A.A. Lukhanin, V. P. Ladygin, S.A. Averichev, G. M. Gurevich, R. A. Shindin, P. Krstonoshich, V.F. Chumakov, E.V. Chernykh, V.N. Matafonov, Yu.A. Usov, Yu.T. Borzunov, O. N. Schevelev, A. B. Neganov, A.N. Livanov, I.V. Zaitsev, Yu. A. Plis, V. V. Fimushkin, V. Yu. Prytkov, A.A. Zhdanov, P. K. Maniakov, A.I. Kovalev, V.G. Antonenko, S. B. Borzakov, V.D. Moroz, M. Finger, G.D. Stoletov, A. de Lesquen, Tz. Panteleev, N. G. Anischenko, A. N. Prokofiev, S.A. Dolgii, I. P. Yudin, Alexander Kovalenko, Yu. K. Pilipenko, S.N. Shilov, I. L. Pisarev, A.A. Belyaev, N.A. Bazhanov, Vladislav Sharov, Yu.P. Polunin, V. B. Shutov, T. A. Vasiliev, and M. Slunečka

Subjects
Nuclear physics, Nuclear reaction, Physics, Particle physics, Particle properties, Observational error, Russian federation, Delta-sigma modulation, Energy (signal processing)
Published
2003

22. Angular dependence of theppelastic-scattering analyzing power between 0.8 and 2.8 GeV. II. Results for higher energies

Author

D. Lopiano, B. Vuaridel, A. Teglia, R. Hess, A. A. Zhdanov, A.A. Popov, V.N. Matafonov, C. E. Allgower, M. de Mali, Yu. A. Usov, Z. F. Janout, M. Combet, R.A. Kunne, J.-L. Sans, F. Lehar, M. E. Beddo, Ph. Demierre, A. de Lesquen, A. N. Prokofiev, J. Ball, P.-A. Chamouard, H. M. Spinka, V.A. Kalinnikov, D. Rapin, I. L. Pisarev, V. V. Vikhrov, B.A. Khachaturov, J.M. Fontaine, D. Grosnick, J. Bystrický, T.E. Kasprzyk, and Z. Janout

Subjects
Elastic scattering, Nuclear physics, Physics, Nuclear and High Energy Physics, Angular momentum, Degree (graph theory), Scattering, Measuring instrument, Atomic physics, Kinetic energy, Beam (structure), Spin-½
Abstract

Measurements at 18 beam kinetic energies between 1975 and 2795 MeV and at 795 MeV are reported for the pp elastic-scattering single spin parameter A{sub ooon}=A{sub oono}=A{sub N}=P. The c.m. angular range is typically 60{endash}100{degree}. These results are compared to previous data from Saturne II and other accelerators. A search for energy-dependent structure at fixed c.m. angles is performed, but no rapid changes are observed. {copyright} {ital 1999} {ital The American Physical Society}

Published
1999

23. Angular dependence of theppelastic-scattering analyzing power between 0.8 and 2.8 GeV. I. Results for 1.80–2.24 GeV

Author

J. Ball, P.-A. Chamouard, L.S. Barabash, P.-Y. Beauvais, V. V. Vikhrov, N. S. Borisov, Ph. Demierre, Yu. A. Usov, Y. Bedfer, F. Lehar, D. Grosnick, M. E. Beddo, D. Rapin, J.-L. Sans, V.N. Matafonov, C. A. Whitten, A. Boutefnouchet, Z. Janout, J.-M. Lagniel, J.L. Lemaire, A. de Lesquen, D. Lopiano, Z. F. Janout, A. A. Zhdanov, R. Hess, V. Ghazikhanian, A.A. Popov, H. M. Spinka, M. Combet, B.A. Khachaturov, J.M. Fontaine, V.A. Kalinnikov, G. Milleret, B. Vuaridel, R.A. Kunne, C. E. Allgower, A. N. Prokofiev, Yu.M. Kazarinov, M. de Mali, I.L. Pisarev, J. Bystrický, and T.E. Kasprzyk

Subjects
Elastic scattering, Physics, Nuclear and High Energy Physics, Angular momentum, Physics::Instrumentation and Detectors, Scattering, Particle accelerator, Kinetic energy, law.invention, Nuclear physics, Recoil, law, Physics::Accelerator Physics, Atomic physics, Nuclear Experiment, Beam (structure), Spin-½
Abstract

Experimental results are presented for the $\mathrm{pp}$ elastic-scattering single spin observable ${A}_{\mathrm{oono}}{=A}_{\mathrm{ooon}}{=A}_{N}=P,$ or the analyzing power, at 19 beam kinetic energies between 1795 and 2235 MeV. The typical c.m. angular range is $60--100\ifmmode^\circ\else\textdegree\fi{}.$ The measurements were performed at Saturne II with a vertically polarized beam and target (transverse to the beam direction and scattering plane), a magnetic spectrometer and a recoil detector, both instrumented with multiwire proportional chambers, and beam polarimeters.

Published
1999

24. Quasi-elastic pn scattering in $^6$LiD and $^6$LiH targets from 1.1 to 2.4 GeV

Author

J.-L. Sans, R.A. Kunne, J. Ball, D. Lopiano, Yu. A. Usov, G. Durand, Ph. Demierre, C. E. Allgower, A. A. Zhdanov, H. M. Spinka, D. Grosnick, A.A. Popov, Z. Janout, B. Vuaridel, D. Rapin, T.E. Kasprzyk, V.N. Matafonov, A. de Lesquen, B.A. Khachaturov, J.M. Fontaine, V.A. Kalinnikov, F. Lehar, A. N. Prokofiev, V. V. Vikhrov, I.L. Pisarev, J. Bystrický, R. Hess, M. Beddo, M. Combet, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Robert, Suzanne

Subjects
Elastic scattering, Physics, Physics and Astronomy (miscellaneous), Proton, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], 010308 nuclear & particles physics, Scattering, Observable, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Neutron, Nuclear Experiment, 010306 general physics, Nucleon, Engineering (miscellaneous), Beam (structure), Spin-½
Abstract

A polarized proton beam from SATURNE II, the Saclay polarized targets with $^6$ Li compounds, and an unpolarized $\mathrm{CH}_2$ target were used to measure spin-dependent observables for protons scattered on bound nucleons. The beam and target polarizations were oriented vertically. The analyzing power $A_{\mathrm{oono}}$ and the depolarization $D_{\mathrm{nono}}$ were determined at seven energies between 1.1 and 2.4 GeV. The spin correlation parameter $A_{\mathrm{oonn}}$ was measured at only 1.1 and 1.6 GeV. Measurements with the $\mathrm{CH}_2$ target at 1.1 GeV provided $A_{\mathrm{oono}}$ data for scattering of polarized protons on neutrons in carbon. The quasi-elastic observables are compared with previous elastic scattering measurements and at 1.1 GeV with predictions of phase shift analyses.

Published
1999

25. Polarimetry of the polarized proton and deuteron beams at intermediate energies

Author

J. Ball, T.E. Kasprzyk, B. Vuaridel, B.A. Khachaturov, I.L. Pisarev, A. Boutefnouchet, J.M. Fontaine, A. N. Prokofiev, D. Lopiano, D. Rapin, J.-L. Sans, C. A. Whitten, V. V. Vikhrov, C. E. Allgower, H. M. Spinka, A. A. Zhdanov, A. de Lesquen, J. Bystricky, R.A. Kunne, V.A. Kalinnikov, M. Beddo, Z. Janout, V.N. Matafonov, Ph. Demierre, N. M. Piskunov, L. S. Azhgirej, Yu. A. Usov, S. Trentalange, V. Ghazikhanian, D. Grosnick, G. D. Stoletov, F. Lehar, A.A. Popov, Y. Bedfer, 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), and Robert, Suzanne

Subjects
Physics, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Theory, Polarimetry, General Physics and Astronomy, Beam polarization, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Polarization (waves), 01 natural sciences, 7. Clean energy, 010305 fluids & plasmas, law.invention, Nuclear physics, Deuterium, law, 0103 physical sciences, Physics::Accelerator Physics, High Energy Physics::Experiment, Synchrophasotron, Atomic physics, 010306 general physics, Nuclear Experiment, Beam (structure)
Abstract

Method and results of the beam polarization measurements are presented. The measurements were carried out at the proton polarized beam of Saturne-II accelerator as well as at the JINR (Dubna) synchrophasotron vector polarized deuteron beam. The analysis of the elastic (quasi-elastic) pp-scattering polarization is used as a method of the polarization measurements. The energy range of the measurement is 1.0≤Tp≤2.8 GeV for polarized proton and 1.66≤Td≤7.3 GeV for polarized deuteron beams.

Published
1999

26. Measurement of spin-dependent total cross-section difference $\Delta\sigma_T$ in neutron-proton scattering at 16 MeV

Author

J. Brož, J. Černý, Z. Doležal, G.M. Gurevich, M. Jirásek, P. Kubík, A.A. Lukhanin, J. Švejda, I. Wilhelm, N.S. Borisov, Yu.M. Kazarinov, B.A. Khachaturov, E.S. Kuzmin, V.N. Matafonov, A.B. Neganov, I.L. Pisarev, Yu.A. Plis, Yu.A. Usov, M. Rotter, and B. Sedlák

Subjects
Physics, Nuclear and High Energy Physics, Proton scattering, Nuclear Theory, Sigma, Neutron, Atomic physics, Neutron radiation, Polarization (waves), Nuclear Experiment
Abstract

A new measurement of $\Delta\sigma_T$ for polarized neutrons transmitted through a polarized proton target at 16.2 MeV has been made. A polarized neutron beam was obtained from the $^{3}\rm{H}(d,\vec n)^{4}\rm{He}$ reaction; proton polarization over 90\% was achieved in a frozen spin target of 20 cm$^3$ volume. The measurement yielded the value $\Delta\sigma_T=(-126\pm21\pm14)$ mb. The result of a simple phase shift analysis for the $^3S_1-^3D_1$ mixing parameter $\epsilon_1$ is presented and compared with the theoretical potential model predictions., Comment: 17 pages, 8 ps figures, available at http://www.troja.mff.cuni.cz/~dolezal/dstprep.html

Published
1995

27. A new movable polarized target at Dubna

Author

G. M. Gurevich, N.M. Piskunov, Yu.T. Borzunov, A. B. Neganov, Yu. A. Plis, S. V. Mironov, N. S. Borisov, N. G. Anischenko, V. V. Teterin, V.N. Matafonov, S. N. Shilov, Yu. A. Shishov, E.A. Matyushevsky, A. V. Gevchuk, L. B. Golovanov, A. I. Kovalev, Yu. A. Usov, V. Yu. Trautman, F. Lehar, S.V. Topalov, G. Durand, A. A. Lukhanin, A.P. Tsvinev, P. V. Sorokin, A. de Lesquen, A. B. Lazarev, A. P. Dzyubak, V. F. Burinov, N. A. Bazhanov, Ph. Leconte, and B. Benda

Subjects
Physics, Nuclear physics, law, Particle accelerator, Fermilab, Polarized target, law.invention
Abstract

A description of the recently installed mouable Polarized Proton Targe (MPT) at the JINR in Dubna is described. This target was acquired from Fermilab. The physics program based on the MPT at Dbna is outlined. (AIP)

Published
1995

28. The movable polarized target as a basic equipment for high energy spin physics experiments at the JINR-Dubna accelerator complex

Author

A.D. Kirillov, E.S. Kousmine, G. M. Gurevich, V.N. Matafonov, L.N. Strunov, A. Lazarev, Yu. Kisselev, V. Perelygin, V.P. Ladygin, A. N. Prokofiev, A.I. Kovaljov, Yu.P. Telegin, G. Durand, L.B. Golovanov, V.A. Kalinnikov, E.A. Matyushevsky, Ph. Leconte, C. A. Whitten, A. P. Tsvinev, N. Angelov, J. J. de Swart, V.G. Baryshevsky, A.P. Dzyubak, V. Grebenyuk, V.G. Antonenko, Yu.P. Polunin, N. Horikawa, E.V. Chernykh, M. Giorgi, A.A. Lukhanin, N. M. Piskunov, M.G. Sapozhnikov, A.A. Nomofilov, A.B. Neganov, J. Ball, E. I. Bunyatova, I. L. Pisarev, S. Mango, A. Zarubin, H. M. Spinka, I.M. Karnaukhov, S.N. Shilov, T.E. Kasprzyk, V. Sharov, F. Lehar, Yu.P. Popkov, A.A. Propov, Yu.T. Borzunov, Yu. A. Plis, B.S. Neganov, V.P. Androsov, A.L. Svetov, M. Combet, A. Kovalenko, N. Borisov, B. Benda, A. Datskov, V. A. Bodyagin, B. Adiasevich, D. Grosnick, I. Tolmashov, G. Igo, Yu.A. Usov, B.A. Khachaturov, D. Hill, S. A. Zaporozhets, L. Zolin, A.A. Zhdanov, A. de Lesquen, Franco Bradamante, I.M. Sitnik, J.M. Fontaine, E.A. Sporov, S. V. Mironov, P.A. Rukoyatkin, Alan D. Martin, N. G. Anischenko, T. Hasegawa, A.A. Belyaev, Z. Janout, J.L. Sans, N.A. Bazhanov, Yu. Pilipenko, V.A. Get'man, V.V. Vikhrov, S. Trentalange, V. F. Burinov, M.P. Rekalo, Yu.A. Shishov, P.V. Sorokin, F., Lehar, B., Adiasevich, V. P., Androsov, N., Angelov, N., Anischenko, V., Antonenko, J., Ball, V. G., Baryshevsky, N. A., Bazhanov, A. A., Belyaev, B., Benda, V., Bodyagin, N., Borisov, Borzunov, Y. u., Bradamante, Franco, E., Bunyatova, V., Burinov, E., Chernykh, M., Combet, A., Datskov, G., Durand, A. P., Dzyubak, J. M., Fontaine, V. A., Get'Man, Giorgi, Marcello, L., Golovanov, V., Grebenyuk, D., Grosnick, G., Gurevich, T., Hasegawa, D., Hill, N., Horikawa, G., Igo, Z., Janout, V. A., Kalinnikov, I. M., Karnaukhov, T., Kasprzyk, B. A., Khachaturov, A., Kirillov, Kisselev, Y. u., E. S., Kousmine, A., Kovalenko, A. I., Kovaljov, V. P., Ladygin, A., Lazarev, Leconte, P. h., A., de Lesquen, A. A., Lukhanin, S., Mango, Martin, Anna, V. N., Matafonov, E., Matyushevsky, S., Mironov, A. B., Neganov, B. S., Neganov, A., Nomofilov, V., Perelygin, Plis, Y. u., Pilipenko, Y. u., I. L., Pisarev, N., Piskunov, Polunin, Y. u., Popkov, Y. u. P., A. A., Propov, A. N., Prokofiev, M. P., Rekalo, P., Rukoyatkin, J. L., San, M. G., Sapozhnikov, V., Sharov, S., Shilov, Shishov, Y. u., I. M., Sitnik, P. V., Sorokin, H., Spinka, E. A., Sporov, L. N., Strunov, A., Svetov, J. J., de Swart, Telegin, Y. u. P., I., Tolmashov, S., Trentalange, A., Tsvinev, Usov, Y. u. A., V. V., Vikhrov, C. A., Whitten, S., Zaporozhet, A., Zarubin, A. A., Zhdanov, and L., Zolin

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, High energy, Proton, polarized proton target, spin physics experiments, Physics::Accelerator Physics, Nuclear Experiment, Instrumentation, Polarized target
Abstract

A movable polarized proton target is planned to be installed in polarized beams of the Synchrophasotron-Nuclotron complex in order to carry out a spin physics experimental program at Dubna. The project is described and the first proposed experiments are discussed.

Published
1995

29. Polarized target for nucleon-nucleon experiments at Saturne II

Author

J. Deregel, B.A. Khachaturov, J. Ball, J.-L. Sans, G. Durand, C. Gaudron, T.E. Kasprzyk, F. Lehar, Yu. A. Usov, P. Chaumette, B. Benda, A. de Lesquen, Z. Janout, V.N. Matafonov, and M. Combet

Subjects
Physics, Proton, Scattering, Nuclear Theory, Hadron, Particle accelerator, Coplanarity, Polarization (waves), law.invention, Nuclear physics, law, Neutron, Atomic physics, Nuclear Experiment, Nucleon
Abstract

Continuous improvements of SATURNE polarized target resulted in a flexible and reliable facility for spin physics. For polarized neutron target, two cartridges loaded with 6LiD and 6LiH are set in the refrigerator and can be quickly inserted in the beam. The polarized proton target is a 70 cm3 cartridge loaded with Pentanol‐2, a promising material according to the results obtained. Angular distribution as a function of a kinematically conjugate angle and coplanarity in nucleon‐nucleon scattering is shown for different targets.

Published
1995

30. Target with a frozen nuclear polarization for experiments at low energies

Author

V.N. Matafonov, A. Srnka, B. Sedlák, A. B. Neganov, O. N. Shchevelev, Yu. A. Plis, J. Jelínek, I. Jánský, N. S. Borisov, Yu. A. Usov, G. M. Gurevich, I. Wilhelm, A. A. Lukhanin, L. Skrbek, and Miloš Rotter

Subjects
Physics, Nuclear and High Energy Physics, Polarization rotator, Spin polarization, Relaxation (NMR), Spin–lattice relaxation, Polarization (waves), Charged particle, Neutron temperature, Ion, Magnetic field, Paramagnetism, Neutron, Insensitive nuclei enhanced by polarization transfer, Atomic physics, Nucleon, Instrumentation
Abstract

The short history of the development of frozen spin polarized targets at the Laboratory of Nuclear Problems JINR is given. The latest development is the target with a frozen spin polarization of protons in 1,2‐ propanediol with a paramagnetic CrV impurity, intended for polarization parameter studies in np‐scattering at approximately 15 MeV neutron energy. The target of cylindrical shape of 2 cm diameter and 6 cm long with an initial polarization of 95±3% obtainable by the dynamic polarization technique is placed at a temperature about 20 mK in a magnetic field of 0.37 T generated by a magnetic system, which provides a large aperture for scattered particles. The relaxation time for the spin polarization is about 1000 hours.

Published
1995

31. Frozen spin polarised deuteron target 60 cm3in volume

Author

M.Yu. Liburg, E. I. Bunyatova, N. S. Borisov, A. B. Neganov, V.N. Matafonov, and Yu. A. Usov

Subjects
Materials science, Relaxation (NMR), General Engineering, Analytical chemistry, Spin–lattice relaxation, General Physics and Astronomy, Propanediol, Nuclear magnetic resonance, Deuterium, Volume (thermodynamics), General Materials Science, Dilution refrigerator, Spin (physics), Instrumentation
Abstract

A frozen spin polarised deuteron target cooled by a dilution refrigerator is described. Fully deuterated ethanediol and propanediol synthesised with a Cr(V) complex are used as the target materials. The following results are obtained: the maximum polarisation is 0.4, the maximum spin-lattice relaxation time is up to approximately 1500 h at 20 mK and 0.53 T.

Published
1988

32. Polarization parameters in the reactions ?? p ???n and ?? p ????n at 40 GeV/c

Author

Yu. A. Usov, M.Yu. Liburg, N. S. Borisov, V. L. Rykov, S.B. Nurushev, B.A. Khachaturov, V. L. Solovianov, AF Prudkoglyad, V.N. Matafonov, A.A. Morozov, A. P. Meschanin, Yu. Sh. Bagaturia, L.N. Glonti, L. F. Solviev, TM Sakhelashvili, A. B. Neganov, Andrey Vasiliev, O.A. Grachev, I. A. Avyakumov, V.D. Apokin, AI Mysnik, Yu.M. Kazarinov, A. A. Derevschikov, N. I. Belikov, Yu.I. Arestov, V.V. Siksin, Yu. A. Mtulenko, and G. C. Macharashvili

Subjects
Physics, Physics and Astronomy (miscellaneous), Meson, Hadron, Elementary particle, Inelastic scattering, Baryon, Nuclear physics, Particle decay, Mass spectrum, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Engineering (miscellaneous)
Abstract

The polarization parameter in the reactions π−p→ηn and π−p→η′n at 40 GeV/c with −t ranging from 0 to 2.6 (GeV/c)2 and 1.0 (GeV/c)2, respectively, was measured in experiments using a propanediol polarized target. Only gamma particles from the neutral meson decay were detected. The polarization parameter of the first reaction turns out to be negative in a widet interval (0.05

Published
1987

33. POLARIZATION EFFECTS IN CHARGE-EXCHANGE REACTION AT 40 GeV/c

Author

I.A. Avvakumov, B.A. Khachaturov, Yu. Sh. Bagaturia, V.V. Siksin, M.Yu. Liburg, V.D. Apokin, L.N. Glonti, L. F. Soloviev, A.A. Morozov, A. F. Prudkogliad, Yu A. Matulenko, G.G. Macharashvili, Yu. A. Usov, N. S. Borisov, V.N. Matafonov, S.B. Nurushev, A.P. Meshchanin, V. L. Rykov, A. B. Neganov, N. I. Belikov, Yu.M. Kazarinov, AI Mysnik, Andrey Vasiliev, A.A. Derevshchikov, N.E. Tyurin, B.S. Neganov, and V. L. Solovianov

Subjects
Physics, General Engineering, Atomic physics, Polarization (electrochemistry), Charge exchange
Published
1985

34. Observation of the polarization in reaction π−→ηn at 40 GeV/c

Author

Yu.M. Kazarinov, N. S. Borisov, E.V. Smirnov, A. P. Meschanin, A. Saraykin, A. Vasilyev, Yu. M. Goncharenko, Yu. A. Usov, I.A. Avvakumov, A. B. Neganov, V.D. Apokin, A. F. Prudkogliad, V.N. Matafonov, Yu.A. Matulenko, A. I. Mysnik, V. L. Solovyanov, B.V. Chuiko, L.B. Parfenov, G.G. Macharashvili, L. F. Solovyev, S. B. Nurushev, and B.A. Khachaturov

Subjects
Physics, Nuclear physics, Momentum transfer, High Energy Physics::Experiment, Nuclear Experiment, Polarization (waves)
Abstract

The preliminary results of polarization measurements in reaction π−+p→η+n at 40 GeV/c for the 4‐momentum transfers up to 1 (GeV/c)2 are presented. Averaged blue of the polarization in the t‐range 0,5

Published
1982

35. Measurement of the spin correlation parameter in pp elastic scattering at 610 MeV

Author

G.G. Macharashvili, Yu. F. Kiselev, V. N. Trofimov, J. Strachota, L.N. Glonti, N. S. Borisov, Yu. A. Usov, B.S. Neganov, V.N. Matafonov, M.Yu. Kazarinov, Yu.M. Kazarinov, V.S. Kiselev, and B.A. Khachaturov

Subjects
Elastic scattering, Physics, Angular momentum, Particle properties, Proton, Scattering, Atomic physics, Beam (structure), Spin-½
Abstract

The spin correlation parameter Cnn has been measured in elastic pp scattering at 610 MeV at CM angles of 40, 67, 78, 90°. A polarized proton beam (PmaxB=0.38±0.02) and a ’’frozen’’ polarize proton target (PmaxT=0.97±0.04) have been used in the experiment.

Published
1976

36. Measurement of the spin asymmetry of cumulative proton production at 90° in the reaction πd↑→px at 40 GeV by using a polaraized deuterium target

Author

V. T. Keem, L. N. Glonty, R. V. Eremeyev, Oleg V. Astafiev, A. B. Neganov, N. S. Borisov, V.N. Matafonov, N. I. Belikov, R. Kh. Kutuyev, V.D. Apokin, S. I. Belenkaya, B.V. Chuiko, M.Yu. Liburg, L. F. Soloviov, VL Rykov, A. F. Prudkogliad, E. I. Buniatova, Yu. A. Usov, A. A. Derevschikov, A. I. Ocharashvili, V. L. Solovianov, R.Ya. Zul'karneev, A. V. Efremov, A. Turowecky, O. A. Grachinov, Yu.A. Matulenko, N.V. Vlasov, S. B. Nurushev, A. P. Meschanin, Yu. Sh. Bagaturia, V. K. Berdyshev, T. S. Gregalashvili, V. Yu. Khodyrev, N.A. Kuzmin, D. I. Patalakha, A. I. Mysnik, Andrey Vasiliev, G.G. Macharashvili, V. V. Mochalov, and TM Sakhelashvili

Subjects
Physics, Proton, Astrophysics::High Energy Astrophysical Phenomena, media_common.quotation_subject, Nuclear Theory, Inelastic scattering, Asymmetry, Nuclear physics, Pion beam, Deuterium, Mass spectrum, Particle, High Energy Physics::Experiment, Nuclear Experiment, Spin (physics), media_common
Abstract

Spin asymmetry of the protons emitted in the (85–95)°L.S. angular region in the π+d↑→p+x reaction was measured using a deuteron frozen‐spin target and a 40 GeV/c pion beam. The experimental results for (0.3–0.7) GeV/c momenta of the protons asre discussed and compared with the predictions of some models of cumulative particle production.

Published
1989

37. Search for azimuthal asymmetry of π0-meson production in beam fragmentation region on polarized protons and deuterons

Author

N. S. Borisov, VL Rykov, L.N. Glonti, N. I. Belikov, Yu. Sh. Bagaturia, V. K. Mjalitsyn, V. L. Solovianov, A. F. Prudkogliad, Oleg V. Astafiev, B.A. Khachaturov, Yu. V. Ermolin, V.N. Matafonov, M.Yu. Liburg, B. V. Chujko, Yu.M. Kazarinov, S. B. Nurushev, M. Yu. Matveev, A.P. Meshchanin, A.A. Derevshchikov, O.A. Grachev, Yu. A. Usov, A. B. Neganov, AI Ocherashvili, TM Sakhelashvili, A.A. Morozov, A. N. Sytin, Yu.A. Matulenko, V.D. Apokin, L. F. Soloviev, G.G. Macharashvili, V. V. Mochalov, A. I. Mysnik, and Andrey Vasiliev

Subjects
Nuclear reaction, Physics, Particle physics, Proton, Meson, media_common.quotation_subject, Nuclear Theory, Hadron, Elementary particle, Asymmetry, Nuclear physics, Pion, Antiproton, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment, media_common
Abstract

The inclusive production of π0’s in the interaction of unpolarized π−, k−, and antiproton beams with polarized proton and deuteron targets has been studied at IHEP. The absolute value of the asymmetry for π0 production in the polarized proton and deuteron targets is between zero and fiften percent for large x=P*/P* max and small Pt and independent on the quark flavor. Results are presented and compared with theoretical calculations. (AIP)The inclusive production of π0’s in the interaction of unpolarized π−, k−, and antiproton beams with polarized proton and deuteron targets has been studied at IHEP. The absolute value of the asymmetry for π0 production in the polarized proton and deuteron targets is between zero and fiften percent for large x=P*/P* max and small Pt and independent on the quark flavor. Results are presented and compared with theoretical calculations. (AIP)

Published
1989

38. Revealing of essential spin effects in hard collisions at 40 GeV

Author

A. F. Prudkogliad, Yu. A. Usov, N. I. Belikov, M.Yu. Liburg, L.N. Glonti, Oleg V. Astafiev, A. I. Mysnik, V. L. Solovianov, B.A. Khachaturov, A.A. Derevshchikov, Andrey Vasiliev, B. V. Chujko, V.N. Matafonov, Yu.A. Matulenko, O.A. Grachev, V.D. Apokin, L. F. Soloviev, G.G. Macharashvili, A. P. Meschchanin, V. V. Mochalov, A. B. Neganov, AI Ocherashvili, D. I. Patalakha, S. B. Nurushev, Yu.I. Arestov, TM Sakhelashvili, Yu.M. Kazarinov, N. S. Borisov, Yu. Sh. Bagaturia, VL Rykov, and A.A. Morozov

Subjects
Physics, Particle physics, Meson, Scattering, media_common.quotation_subject, Hadron, Elementary particle, Asymmetry, Nuclear physics, Pion, High Energy Physics::Experiment, Boson, media_common, Spin-½
Abstract

A 40%‐asymmetry has been revealed in the hard scattering region at 40 GeV. Systematic errors in the experiment are noticeable. The observed effect requires detailed discussion of the production mechanisms.

Published
1989

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