Measurements of proton induced reaction cross sections on 120Te for the astrophysical p-process

Abstract

The total cross sections for the 120Te(p,gamma)121I and 120Te(p,n)120I reactions have been measured by the activation method in the effective center-of-mass energies between 2.47 MeV and 7.93 MeV. The targets were prepared by evaporation of 99.4 % isotopically enriched 120Te on Aluminum and Carbon backing foils, and bombarded with proton beams provided by the FN tandem accelerator at the University of Notre Dame. The cross sections and $S$ factors were deduced from the observed gamma ray activity, which was detected off-line by two Clover HPGe detectors mounted in close geometry. The results are presented and compared with the predictions of statistical model calculations using the codes NON-SMOKER and TALYS.

17 pages, 5 figures, 5 tables, regular article

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• Test of statistical model cross section calculations for $\alpha$-induced reactions on ${}^{107}$Ag at energies of astrophysical interest
• Determination of $\alpha$-optical potential for reactions with p-nuclei from the study of ($\alpha$,n) reactions in the astrophysically relevant energy region
• Systematics of semi-microscopic proton-nucleus optical potential at low energies relevant to nuclear astrophysics
• Photo-nuclear reaction rates of ${}^{157,159}$Ho and ${}^{163,165}$Tm and their impact in the $\gamma$--process
• TALYS calculation and a short review of the experimental status of proton capture studies on p-nuclei: A guide to future investigation