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

G. G. Kiss, T. Szücs, T. Rauscher, Z. Török, Z. Fülöp, G. Gyürky, Z. Halász, E. Somorjai

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Abstract

The cross sections of the Er162(α,γ)Yb166 and Er162(α,n)Yb165 reactions have been measured for the first time. The radiative alpha capture reaction cross section was measured from Ec.m.=16.09MeV down to Ec.m.=11.21MeV, close to the astrophysically relevant region (which lies between 7.8 and 11.48 MeV at 3 GK stellar temperature). The Er162(α,n)Yb165 reaction was studied above the reaction threshold between Ec.m.=12.19 and 16.09MeV. The fact that the Er162(α,γ)Yb166 cross sections were measured below the (α,n) threshold at first time in this mass region opens the opportunity to study directly the α-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. © 2014 Elsevier B.V.
Original languageEnglish
Pages (from-to)40-44
Number of pages5
JournalPhysics Letters B
Volume735
DOIs
Publication statusPublished - 30 Jul 2014

Keywords

  • Astrophysical γ-process
  • Nuclear astrophysics
  • Nucleosynthesis
  • Statistical model

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