Measurements of 152Gd(p,γ)153Tb and 152Gd(p,n)152Tb reaction cross sections for the astrophysical γ process

Güray, R.T. and Özkan, N. and Yalçln, C. and Rauscher, T. and Gyürky, György and Farkas, János and Fülöp, Zsolt and Halász, Zoltán and Somorjai, Endre (2015) Measurements of 152Gd(p,γ)153Tb and 152Gd(p,n)152Tb reaction cross sections for the astrophysical γ process. PHYSICAL REVIEW C, 91 (5). ISSN 2469-9985

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Abstract

The total cross sections for the 152Gd(p,γ)153Tb and 152Gd(p,n)152Tb reactions have been measured by the activation method at effective center-of-mass energies 3.47 ≤ Eeff c.m. ≤ 7.94 MeV and 4.96 ≤ Eeff c.m. ≤ 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 γ-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.

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