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Physical Review C 80 (2009) 044317
Proton decay from the isoscalar giant dipole resonance in 58Ni
M. Hunyadi, H. Hashimoto, T. Li, H. Akimune, H. Fujimura, M. Fujiwara, Z. Gacsi, U. Garg, K. Hara, M.N. Harakeh1, 2, J. Hoffman, M. Itoh, T. Murakami, K. Nakanishi, B.K. Nayak, S. Okumura, H. Sakaguchi, S. Terashima, M. Uchida, Y. Yasuda, M. Yosoi
(2009)

Proton decay from the 3¯hω isoscalar giant dipole resonance (ISGDR) in 58Ni has been measured using the (α, α p) reaction at a bombarding energy of 386MeV to investigate its decay properties. We have extracted the ISGDR strength under the coincidence condition between inelastically scattered α particles at forward angles and decay protons emitted at backward angles. Branching ratios for proton decay to low-lying states of 57Co have been determined, and the results comparedwith predictions of recent continuum-RPAcalculations. The final-state spectra of protons decaying to the low-lying states in 57Co were analyzed for a more detailed understanding of the structure of the ISGDR. It is found that there are differences in the structure of the ISGDR as a function of excitation energy.
1 :  GANIL - Grand Accélérateur National d'Ions Lourds
2 :  KVI - Kernfysisch Versneller Instituut
Physique/Physique Nucléaire Expérimentale