Galactic production of 138La: Impact of 138,139La statistical properties
- Kheswa, B.V.
- Wiedeking, M.
- Giacoppo, F.
- Goriely, S.
- Guttormsen, M.
- Larsen, A.C.
- Bello Garrote, F.L.
- Eriksen, T.K.
- Görgen, A.
- Hagen, T.W.
- Koehler, P.E.
- Klintefjord, M.
- Nyhus, H.T.
- Papka, P.
- Renstrøm, T.
- Rose, S.
- Sahin, E.
- Siem, S.
- Tornyi, T.
Publication date
May 2015
DOI Publisher
The Authors. Published by Elsevier B.V.Abstract
AbstractThe γ-ray strength functions and nuclear level densities of 138La and 139La have been measured below the neutron separation energies. These new data were used to calculate astrophysical Maxwellian-averaged (n,γ) cross-sections to investigate the production and destruction of the p-nucleus 138La in the photodisintegration process. The results confirm the underproduction of 138La in the p-process with respect to the observed abundances and strongly support the ν-process through νe capture on 138Ba as the main contributor to the synthesis of 138La in Type II supernovae
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