Measurements of ${}^{152}$Gd(p,$\gamma$)${}^{153}$Tb and ${}^{152}$Gd(p,n)${}^{152}$Tb reaction cross sections for the astrophysical $\gamma$ process

Abstract

The total cross sections for the ${}^{152}$Gd(p,$\gamma$)${}^{153}$Tb and ${}^{152}$Gd(p,n)${}^{152}$Tb reactions have been measured by the activation method at effective center-of-mass energies \mbox{$3.47\le E_{c.m.}^{\mathrm{eff}}\le 7.94$ MeV} and \mbox{$4.96\le E_{c.m.}^{\mathrm{eff}}\le 7.94$ MeV}, respectively. The targets were prepared by evaporation of 30.6\% isotopically enriched ${}^{152}$Gd oxide on aluminum backing foils, and bombarded with proton beams provided by a cyclotron accelerator. The cross sections were deduced from the observed $\gamma$-ray activity, which was detected off-line by a HPGe detector in a low background environment. The results are presented and compared with predictions of statistical model calculations. This comparison supports a modified optical proton+${}^{152}$Gd potential suggested earlier.

arXiv commentpublished: PHYSICAL REVIEW C 91, 055809 (2015)

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