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The first 2 + excited state of 24O
Tshoo K., Satou Y., Nakamura T., Aoi N., Bhang H.C. et al
Dans Journal of Physics: Conference Series - International Nuclear Physics Conference 2010, INPC2010, Vancouver : Canada (2010) - http://hal.in2p3.fr/in2p3-00691968
Physique/Physique Nucléaire Expérimentale
The first 2 + excited state of 24O
K. Tshoo, Y. Satou, T. Nakamura, N. Aoi, H.C. Bhang, S. Choi, S. Deguchi, F. Delaunay1, J. Gibelin1, T. Honda, M. Ishihara, Y. Kawada, Y. Kondo, T. Kobayashi, N. Kobayashi, F.M. Marqués1, M. Matsushita, Y. Miyashita, T. Motobayashi, Y. Nakayama, N.A. Orr1, H. Otsu, H. Sakurai, S. Shimoura, D. Sohler, T. Suniikama, S. Takeuchi, K.N. Tanaka, N. Tanaka, Y. Togano, K. Yoneda, K. Yoshinaga, T. Zheng, Z.H. Li, Z.X. Cao
1 :  LPCC - Laboratoire de Physique Corpusculaire de Caen
CNRS : UMR6534 – IN2P3 – Université de Caen Basse-Normandie – Ecole Nationale Supérieure d'Ingénieurs de Caen
ENSICAEN - 6, boulevard du Marechal Juin 14050 Caen Cedex
Structure nucléaire
The unbound excited states of the most neutron-rich dripline oxygen isotope, O (Z=8, N=16), have been investigated using the 24O(p, p′)O* reaction at the beam energy of 63 MeV/nucleon in inverse kinematics at RIKEN. The 24O beam was produced in the projectile-like fragmentation process of a 95 MeV/nucleon 40Ar primary beam on the Be production target. The decay energy spectrum of 24O* in 23O+n channel was reconstructed in the invariant mass of the neutron and the charged fragment detected in coincidence. The first unbound excited state of 24O has been observed at Ex=4.68 -0.14 +0.21 14 MeV (preliminary) along with the evidence for another higher lying state at around 7.3 MeV. The energy of the former state is compared with existing data and the results of shell-model calculations.

Communications avec actes
Journal of Physics: Conference Series

International Nuclear Physics Conference 2010, INPC2010

Beam energies – Charged fragments – Decay energy – Fragmentation process – Invariant mass – N-channel – Oxygen isotopes – Primary beams – Production targets