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Invariant Mass Spectroscopy for the Neutron Rich Nuclei
Satou Y., Tshoo K., Bhang H.C., Choi S.H., Nakamura T. et al
Journal of the Korean Physical Society 59 (2011) 1467-1472 - http://hal.in2p3.fr/in2p3-00642043
Physique/Physique Nucléaire Expérimentale
Invariant Mass Spectroscopy for the Neutron Rich Nuclei
Y. Satou, K. Tshoo, H.C. Bhang, S.H. Choi, T. Nakamura, Y. Kondo, Y. Nakayama, N. Kobayashi, K.N. Tanaka, S. Deguchi, Y. Kawada, N. Tanaka, T. Sugimoto, T. Motobayashi, H. Sakurai, H. Otsu, N. Aoi, Y. Yanagisawa, S. Takeuchi, N. Fukuda, K. Yoneda, Y. Togano, H.J. Ong, S. Shimoura, T. Kobayashi, Y. Matsuda, M. Matsushita, T. Honda, T. Sumikama, Y. Miyashita, K. Yoshinaga, N.A. Orr1, F.M. Marqués1, J. Gibelin1, F. Delaunay1, D. Sohler, T. Zheng, Z.H. Li, Z.X. Cao, M. Ishihara
1 :  LPCC - Laboratoire de Physique Corpusculaire de Caen
http://www.lpc-caen.in2p3.fr/
CNRS : UMR6534 – IN2P3 – Université de Caen Basse-Normandie – Ecole Nationale Supérieure d'Ingénieurs de Caen
ENSICAEN - 6, boulevard du Marechal Juin 14050 Caen Cedex
France
structure nucléaire
The neutron-rich carbon isotopes (19,17)C and a boron isotope (14)B are investigated respectively via proton inelastic and charge-exchange reactions on a liquid hydrogen target at around 70 MeV/nucleon at RIKEN. The invariant mass method in inverse kinematics involving coincidence detection of a charged fragment and a neutron both emitted at forward angles is employed to map the energy spectrum above the neutron decay threshold. Several resonance structures are revealed in the invariant mass spectra, and the nature for some of them is discussed from comparisons of differential cross section data with predictions of microscopic DWBA calculations based on spsdp f shell model wave functions and a recent parametrization of semi-microscopic nucleon-nucleus optical model potential (JLMB). By extrapolating the (p, n) cross sections leading to the 1(+) state at 1.27 MeV in (14)B to zero momentum transfer the Gamow-Teller transition strength is deduced. The value is found to compare well with that reported in a beta-delayed neutron emission study.

Articles dans des revues avec comité de lecture
2011
Journal of the Korean Physical Society
59
1467-1472

Radioactive isotope beams – (p – p ') and (p – n) reactions – Invariant mass method – DWBA analysis – Gamow-teller transition