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1. Results of Measurements of the Analyzing Powers for Polarized Neutrons on C, CH 2 and Cu Targets for Momenta Between 3 and 4.2 GeV/c

Author

J. Musinsky, A. V. Shipunov, R. A. Montgomery, V. M. Slepnev, A. V. Shutov, P. A. Rukoyatkin, K. S. Legostaeva, O. P. Gavrishchuk, N. V. Kostayeva, D. Marchand, A. A. Povtoreiko, C. F. Perdrisat, I.M. Sitnik, I. V. Slepnev, A. N. Livanov, K. Hamilton, R. A. Shindin, A. V. Terletskiy, I. A. Philippov, V. V. Glagolev, V. A. Punjabi, J. R. M. Annand, N.M. Piskunov, S. N. Basilev, Ying Wang, J. Urban, Egle Tomasi-Gustafsson, Di. Kirillov, Alexander Kovalenko, G. Martinska, Yu.P. Bushuev, 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), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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, History, Nuclotron, 010308 nuclear & particles physics, Computer Science::Information Retrieval, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Polarimeter, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Polarization (waves), 01 natural sciences, Charged particle, 030218 nuclear medicine & medical imaging, Computer Science Applications, Education, Nuclear physics, 03 medical and health sciences, 0302 clinical medicine, Deuterium, 0103 physical sciences, Figure of merit, Neutron, Nucleon, Nuclear Experiment
Abstract

The analyzing powers for neutron charge exchange nA → pX reactions on nuclei have been measured on C, CH2 and Cu targets at incident neutron momenta 3.0 - 4.2 GeV/c by detecting one charged particle in forward direction. The polarized neutron measurements are the first of their kind. The experiment was performed using the Nuclotron accelerator in JINR Dubna, where polarized neutrons and protons were obtained from breakup of a polarized deuteron beam which has a maximum momentum of 13 GeV/c. The polarimeter ALPOM2 was used to obtain the analyzing power dependence on the transverse momentum of the final-state nucleon. These data have been used to estimate the figure of merit of a proposed experiment at Jefferson Laboratory to measure the recoiling neutron polarization in the quasi-elastic 2 H(e, e′n) reaction, which yields information on the charge and magnetic elastic form factors of the neutron.

Published
2019

2. Measurement of analysing powers for neutron scattering on CH2, CH, C and Cu target for momenta from 3.0 to 4.2 GeV/c

Author

Ivan A. Philippov, Jozef Urbán, Roman A. Shindin, Charles F. Perdrisat, Kseniya S. Legostaeva, E. Tomasi-Gustafsson, Gabriela Martinská, Alexey N. Livanov, Andrey V. Terletskiy, Natalia V. Kostayeva, D. Marchand, J. R. M. Annand, Yuri P. Bushuev, Dmitry A. Kirillov, E. J. Brash, R. A. Montgomery, Alexey V. Shutov, Viacheslav M. Slepnev, Oleg P. Gavrishchuk, Igor Mihailovich Sitnik, Kieran Hamilton, Ilia V. Slepnev, Pavel A. Rukoyatkin, Sergey N. Basylev, Victor V. Glagolev, Ying Wang, Anatoly A. Povtoreiko, V. A. Punjabi, N.M. Piskunov, Andrey V. Shipunov, Alexander Kovalenko, Jan Musinsky, M. K. Jones, Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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 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)

Subjects
Proton, Astrophysics::High Energy Astrophysical Phenomena, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Nuclear Theory, elastic scattering, carbon: hydrogen, Neutron scattering, 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, Neutron, 010306 general physics, Nuclear Experiment, 010302 applied physics, Physics, Elastic scattering, Nuclotron, Scattering, Dubna Nuclotron, n nucleus: scattering, p: beam, Neutron radiation, charge exchange, analyzing power: angular dependence, deuteron: beam, n: polarized beam, copper, Physics::Accelerator Physics, High Energy Physics::Experiment, Nucleon, n: scattering
Abstract

International audience; During two beam runs in the years 2016 and 2017, the analyzing powers (Ay) for protons and neutrons scattering on CH2, CH, C and Cu targets were measured at the nucleon momentum from 3.0 to 4.2 GeV/c with the ALPOM2 setup at the Nuclotron accelerator. The data for polarized neutron beam are obtained for the first time, thanks to the unique polarized deuteron beam that is presently available up to 13 GeV/c. Earlier, analyzing powers for polarized neutrons had been measured only for thin hydrogen targets. Cross sections and analyzing powers for np, for both elastic scattering and charge exchange are known up to 29 GeV/c. No data existed for thick analyzers. The measurement of the angular dependence of Ay for the neutron is essential to the continuation of the neutron form factor measurements to the highest possible transferred momentum-Q2 at the Jefferson Laboratory. The reaction p+Cu(W), with the detection of a neutron in the forward direction by a hadron calorimeter, can be used for the measurement of the proton polarization at the future NICA collider.

Published
2018

3. Measurement of analyzing power for the reaction TeX at polarized proton momentum of 7.5 GeV/c (ALPOM2 proposal)

Author

P. Balandin, V., E. Baskakov, A., N. Basilev, S., Brash, E., P. Bushuev, Yu., P. Gavrishchuk, O., V. Glagolev, V., K. Jones, M., G. Kadykov, M., Khandaker, M., Kirillov, D.A., T. Kiryushin, Yu., V. Kostyukhov, E., Kuzmin, N.A., N. Livanov, A., K. Manyakov, P., Martinska, G., Meziane, M., Movchan, S.A., Mušinsky, J., Pentchev, L., F. Perdrisat, C., M. Piskunov, N., A. Povtoreiko, A., Punjabi, V., A. Rukoyatkin, P., A. Shindin, R., V. Shutov, A., Shutova, N.A., M. Sitnik, I., M. Slepnev, V., V. Slepnev, I., Ya. Sychkov, S., Tomasi-Gustafsson, E., E. Vasiliev, S., V. Vishnevsky, A., I. Yukaev, A., Urban, Jakub, Wojtsekhowski, B., 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), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

An accurate data base for the analyzing power of thick CH2 analyzers for high energy protons has been at the basis of several research efforts in a number of laboratories. Starting in the late eighties such data were collected at SATURNE in Saclay, and with the Synchrophasotron in Dubna, and led to an extensive program of study of polarization phenomena in pd interaction, either backward elastic scattering or breakup [1-6]. At about the same time it became evident that measuring polarization observables in elastic ep was going to be the best approach to determine the form factors of the proton, G Ep and G Mp , as had been predicted by Akhiezer and Rekalo

Published
2014

4. Erratum: Half-life and excitation energy of the I$\pi$=13/2+ isomer in $^{209}$Ra [Phys. Rev. C 77, 047305 (2008)]

Author

Hauschild, K., Lopez-Martens, A., V. Yeremin, A., Dorvaux, O., V. Belozerov, A., L. Chelnokov, M., I. Chepigin, V., Gall, B., A. Gorshkov, V., Guttormsen, M., Jones, P., P. Kabachenko, A., Khouaja, A., C. Larsen, A., N. Malyshev, O., Minkova, A., T. Nyhus, H., Ts. Oganessian, Yu., Pantelica, D., G. Popeko, A., Rotaru, F., Saro, S., V. Shutov, A., Siem, S., I. Svirikhin, A., U. H. Syed, N., Département Recherches Subatomiques (DRS-IPHC), and 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)

Subjects
27.80.+w, 23.35.+g, 23.20.Lv, 23.20.Nx, 99.10.Cd, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2009

5. High-K, t$_{1/2}$ = 1.4(1) ms, isomeric state in $^{255}$Lr

Author

Hauschild, K., Lopez-Martens, A., V. Yeremin, A., Dorvaux, O., Antalic, S., V. Belozerov, A., Briançon, Ch., L. Chelnokov, M., I. Chepigin, V., Curien, D., Gall, B., Görgen, A., A. Gorshkov, V., Guttormsen, M., Hanappe, F., P. Kabachenko, A., Khalfallah, F., C. Larsen, A., N. Malyshev, O., Minkova, A., G. Popeko, A., Rousseau, Marc, Rowley, N., Saro, S., V. Shutov, A., Siem, S., Stuttgè, L., I. Svirikhin, A., U. H. Syed, N., Theisen, Ch., Venhart, M., Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), 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), 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), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, and 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)

Subjects
27.90.+b, 23.35.+g, 23.20.Lv, 23.20.Nx, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

isomeric state in 255Lr with a half-life of t1/2 = 1.4(1) ms and Ex>720-keV has been observed for the first time using the GABRIELA setup at the focal plane of the VASSILISSA separator. Based on its K-forbiddeness, the configuration of the state is most probably formed by coupling the valence proton to a two quasiparticle neutron excitation. Possible three quasiparticle configurations are discussed.

Published
2008

6. Gamma and electron spectroscopy of heavy nuclei at FLNR JINR

Author

A. V. Yeremin, A. V. Belozerov, M. L. Chelnokov, V. I. Chepigin, V. A. Gorshkov, A. P. Kabachenko, O. N. Malyshev, Yu. Ts. Oganessian, A. G. Popeko, A. V. Shutov, A. I. Svirikhin, A. Lopez-Martens, K. Hauschild, Ch. Briancon, A. Korichi, D. Curien, O. Dorvaux, B. Gall, F. Khalfallah, M. Rousseau, N. Rowley, M. Guttormsen, S. Siem, A.-C. Sunde, N. Syed, F. Hanappe, A. Minkova, S. Sharo, M. Venhart, Ch. Theisen, Yu. E. Penionzhkevich, E. A. Cherepanov, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), 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), 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), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Yu. E. Penionzhkevich, E. A. Cherepanov, 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 spin, 29.30.Kv, 29.30.Dn, 27.90.+b, 21.10.Hw, nuclear energy levels, Transactinide element, 020206 networking & telecommunications, electron spectroscopy, 02 engineering and technology, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, Electron spectroscopy, Nuclear physics, gamma-ray spectroscopy, Excited state, 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, Gamma spectroscopy, alpha-decay, Alpha decay, Atomic physics, Spin (physics), Spectroscopy, Radioactive decay, nuclear parity
Abstract

International audience; Detailed spectroscopic information of excited nuclear states in deformed transfermium nuclei is scarce. Most of the information available today has been obtained from investigations of fine structure $\alpha$ decay. Although $\alpha$ decay gives access to hindrance factors and lifetimes which are strongly correlated to shell/subshell closures and the presence of isomers, only the combined use of $\gamma$ and conversion electron spectroscopy allows the precise determination of excitation energy, spin and parity of nuclear levels. In particular, the study of odd isotopes gives crucial information on the single particle states available at and around the Fermi surface. In the following, the preliminary results of decay studies using $\alpha - \gamma$ and $\alpha - \beta$ coincidences at the focal plane of the VASSILISSA recoil separator are presented.

Published
2006

7. On-line separator for $\gamma$-spectroscopic studies at FLNR JINR

Author

A. G. Popeko, A. V. Belozerov, V. I. Chepigin, O. Dorvaux, K. Hauschild, A. P. Kabachenko, A. Korichi, A. Lopez-Martens, O. N. Malyshev, A. V. Shutov, A. I. Svirikhin, A. V. Yeremin, Yu. E. Penionzhkevich, E. A. Cherepanov, 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), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), 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), Yu. E. Penionzhkevich, E. A. Cherepanov, 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
010302 applied physics, Physics, Nuclear reaction, Cyclotron, particle separators, Coulomb barrier, Separator (oil production), Transactinide element, gamma-ray spectrometers, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Recoil separator, law.invention, Nuclear physics, Upgrade, law, 29.30.Kv, 29.25.Rm, 25.70.-z, 0103 physical sciences, Nuclear spectroscopy, heavy ion-nucleus reactions, 010306 general physics, radioactive ion beams
Abstract

International audience; A JINR — IN2P3 collaboration project named “GABRIELA” aimed at the nuclear spectroscopy of transfermium elements using the recoil separator VASSILISSA was launched in 2004 at JINR in Dubna. In the close future the FLNR cyclotron U400M will go through a major upgrade with the goal to deliver heavy ion beams at the energy close to the Coulomb barrier in a new experimental area. Here we report about R&D of the new separator for spectroscopic studies which we plan to install at the beam of the modernized accelerator and which will allow to realize new possibilities of the GABRIELA project.

Published
2006

8. GABRIELA setup for nuclear spectroscopy of the transfermium element isotopes at the VASSILISSA separator

Author

A. V. Belozerov, A. Lopez-Martens, V. I. Chepigin, A. P. Kabachenko, A. V. Yeremin, O. N. Malyshev, Yu. Ts. Oganessian, S. Saro, A. Korichi, K. Hauschild, A. V. Shutov, O. Dorvaux, A. G. Popeko, A. I. Svirikhin, Ch. Briançon, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), 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), 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)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
Physics, Nuclear and High Energy Physics, IN-BEAM, Isotope, 010308 nuclear & particles physics, Cyclotron, chemistry.chemical_element, Separator (oil production), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Atomic and Molecular Physics, and Optics, Recoil separator, law.invention, Nuclear physics, chemistry, law, 0103 physical sciences, Nuclear spectroscopy, 29.30.-h - 23.20.-g - 23.40.-s - 23.60.+e, Nobelium, 010306 general physics, Spectroscopy, DECAY, Lawrencium
Abstract

The JINR (Dubna)-IN2P3 (France) Collaboration project aimed at the alpha, beta, gamma spectroscopy of the transfermium element isotopes using heavy-ion beams of the U-400 cyclotron and the modernized recoil separator VASSILISSA was launched at Dubna. During the first full-scale experiment in September-October 2004, nobelium and lawrencium isotopes produced in the Ca-48 + Pb-207,Pb-208 -> No-255,No-256* and Ca-48 + Bi-209 -> Lr-257* reactions were studied

Published
2006

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