Proton decay of high-lying states in odd nuclei

Abstract

In the framework of the quasiparticle-phonon model, we study the non-statistical proton decay of excited states in odd nuclei towards low-lying collective states. Partial cross sections and branching ratios for the proton decay of the high angular momentum states in ${}^{41}$Sc, ${}^{59}$Cu and ${}^{91}$Nb %{\it excited by means of the (${}^7$Li,${}^6$He) reaction} are evaluated. The calculated branching ratios predict strong direct proton decays to the low-lying vibrational states in ${}^{41}$Sc and ${}^{91}$Nb. A general agreement with existing experimental data is found.

Comments: 12 pages, 2 figures, Latex, accepted for publication in Nucl. Phys. A