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4 results on '"A.N. Prokofiev"'

3. 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

4. SPES4–$\pi$: installation for exclusive study of nuclear reactions

Author

J. L. Boyard, T. Hennino, L.G. Kudin, A.A. Zhdanov, A.N. Prokofiev, A. Maroni, E.M. Orischin, C. Gaarde, P. Courtat, P. Radvanyi, Liudmila Malinina, H.-P. Morsch, B. Ramstein, P. Zupranski, V. Poux, E. A. Strokovsky, B.G. Komkov, J. Larsen, M. Roy-Stephan, V.V. Golubev, M. Denoit, V.V. Baublis, M. Boivin, S.S. Volkov, J.-M. Martin, B.V. Razmyslovich, V.V. Astashin, V.Ya. Gerzenstein, A.V. Khanzadeev, C. Ellegaard, V.V. Vikhrov, I.I. Tkach, L. Farhi, R. Douet, S. Lebon, D. Bachelier, R. Skowron, A.V. Kravtsov, J.-F. Clavelin, An.A. Vorobyov, R.A. Kunne, I.B. Smirnov, V.L. Golovtsov, R. Gacougnolle, G.D. Alkhazov, V.A. Mylnikov, A.G. Atamanchuk, J.C. Jourdain, M. Österlund, W. Augustyniak, V.M. Samsonov, Institut de Physique Nucléaire d'Orsay (IPNO), and 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)

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Spectrometer, Proton, 010308 nuclear & particles physics, Scattering, Physics::Instrumentation and Detectors, 29.40.-n, 29.30.-Aj, 07.05.Hd, Data acquisition, Particle detectors, Scintillator, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, Baryon, Magnetic spectrometers, Pion, Dipole magnet, 0103 physical sciences, 010306 general physics, Nuclear Experiment, Instrumentation
Abstract

EI SEP PHASE ACC; The paper describes the spectrometric system “SPES4–$\pi$” used at the National Laboratory Saturne (CE Saclay, France) for the exclusive study of the baryon resonance excitation in inelastic α and d scattering on the proton, as well as coherent pion production in charge exchange reactions. The system consists of the magnetic spectrometer SPES4 and two wide-aperture position-sensitive detector arrays, equipped with wire chambers and scintillator hodoscopes, installed around a large-gap C-shape dipole magnet.

Published
2005

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