Fine structure of the 1g9/2 isobaric analog resonance in 61Cu.

Abstract

Eleven fragments of the 1${\mathit{g}}_{9/2}$ isobaric analog state in $^{61}\mathrm{Cu}$ have been found. To locate these fragments $^{60}\mathrm{Ni}$(p,${\mathit{p}}_{1}$\ensuremath{\gamma}) and $^{60}\mathrm{Ni}$(p,\ensuremath{\gamma}${)}^{61}$Cu reactions were used. The excitation functions were measured in the ${\mathit{E}}_{\mathit{p}}$t/${\mathrm{r}}^{\mathit{l}\mathit{a}\mathit{b}}$=3.67--3.83 MeV proton energy range. To determine the spins of the resonances, \ensuremath{\gamma} angular distributions were measured. Partial widths for each resonance fragment were deduced and fine structure analyses were carried out in the different channels. The inelastic spectroscopic factor was derived for the 1${\mathit{g}}_{9/2}$ isobaric analog state. The results are compared with previous works.