Structure of isobaric analog states in 91Nb populated by the 90Zr(a,t) reaction

Details Structure of isobaric analog states in 91Nb populated by the 90Zr(a,t) reaction Structure of isobaric analog states in 91Nb populated by the 90Zr(a,t) reaction

2000-07-10

arxiv.org/abs/nucl-ex/0007010v1

Phys.Lett.B502:1-8,2001

Physics

Nuclear Physics

Nuclear Experiment

3 figures. submitted to Phys. Lett. B

Scientific paper

10.1016/S0370-2693(01)00168-X

Decay via proton emission of isobaric analog states (IAS's) in $^{91}{Nb}$ was studied using the $^{90}{Zr}(\alpha,t)$ reaction at $E_\alpha$=180 MeV. This study provides information about the damping mechanism of these states. Decay to the ground state and low-lying phonon states in $^{90}{Zr}$ was observed. The experimental data are compared with theoretical predictions wherein the IAS `single-particle' proton escape widths are calculated in a continuum RPA approach. The branching ratios for decay to the phonon states are explained using a simple model.

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