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arXiv · 1406.4989

Alpha induced reaction cross section measurements on 162Er for the astrophysical gamma process

G. G. Kiss·T. Szücs·T. Rauscher·Zs. Török·Zs. Fülöp·Gy. Gyürky·Z. Halász·E. Somorjai
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Abstract

The cross sections of the 162Er(a,g,)166Yb and 162Er(a,n)165Yb reactions have been measured for the first time. The radiative alpha capture reaction cross section was measured from Ec.m. = 16.09 down to Ec.m. = 11.21 MeV, close to the astrophysically relevant region (which lies between 7.8 and 11.48 MeV at 3 GK stellar temperature). The 162Er(a,n)165Yb reaction was studied above the reaction threshold between Ec.m. = 12.19 and 16.09 MeV. The fact that the 162Er(a,g)166Yb cross sections were measured below the (a,n) threshold at first time in this mass region opens the opportunity to study directly the a-widths required for the determination of astrophysical reaction rates. The data clearly show that compound nucleus formation in this reaction proceeds differently than previously predicted.

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G. G. Kiss, T. Szücs, T. Rauscher, Zs. Török, Zs. Fülöp, Gy. Gyürky, Z. Halász, E. Somorjai. 2014-06-19. Alpha induced reaction cross section measurements on 162Er for the astrophysical gamma process. https://doi.org/10.1016/j.physletb.2014.06.011

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