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Proton decay from the isoscalar giant dipole resonance in 58Ni

Abstract : 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.
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Contributor : Michel Lion <>
Submitted on : Friday, November 13, 2009 - 4:18:37 PM
Last modification on : Thursday, February 1, 2018 - 1:26:23 AM

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M. Hunyadi, H. Hashimoto, T. Li, H. Akimune, H. Fujimura, et al.. Proton decay from the isoscalar giant dipole resonance in 58Ni. Physical Review C, American Physical Society, 2009, 80, pp.044317. ⟨10.1103/PhysRevC.80.044317⟩. ⟨in2p3-00432088⟩

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