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

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

Research output: Contribution to journalArticle

19 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)40-44
Number of pages5
JournalPhysics Letters B
Volume735
DOIs
Publication statusPublished - Jul 30 2014

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astrophysics
cross sections
stellar temperature
thresholds
reaction kinetics
nuclei

Keywords

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

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Alpha induced reaction cross section measurements on 162Er for the astrophysical γ process. / Kiss, G.; Szücs, T.; Rauscher, T.; Török, Zs; Fülöp, Zs. S.; Gyürky, G.; Halász, Z.; Somorjai, E.

In: Physics Letters B, Vol. 735, 30.07.2014, p. 40-44.

Research output: Contribution to journalArticle

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AU - Kiss, G.

AU - Szücs, T.

AU - Rauscher, T.

AU - Török, Zs

AU - Fülöp, Zs. S.

AU - Gyürky, G.

AU - Halász, Z.

AU - Somorjai, E.

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N2 - 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.

AB - 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.

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