Kr86(d,p)Kr87 Reactions and Comparisons with (d,p) Reactions on Sr88, Zr90, and Mo92

Abstract

Eleven energy levels in ${\mathrm{Kr}}^{87}$ were located by the ${\mathrm{Kr}}^{86}\mathrm{}(d,p)\mathrm{}{\mathrm{Kr}}^{87}$ reaction. The excitation energies of the levels are ground state, 0.55, 1.52, 2.17, 2.34, 2.57, 2.89, 3.09, 3.31, 3.65, and 3.97 MeV. The orbital-angular-momentum transfer as well as the spectroscopic factors were deduced for the predominant transitions with the aid of distorted-wave Born-approximation calculations. A comparison between the proton spectra obtained by the ($d,p$) reaction on the ${\mathrm{Kr}}^{86}$, ${\mathrm{Sr}}^{88}$, ${\mathrm{Zr}}^{90}$, and ${\mathrm{Mo}}^{92}$ isotones all of which have a closed shell ($N=50\mathrm{}$) of neutrons, but different numbers of proton pairs, is discussed.