Galactic production of 138La: Impact of 138,139La statistical properties

B. V. Kheswa, M. Wiedeking, F. Giacoppo, S. Goriely, M. Guttormsen, A. C. Larsen, F. L. Bello Garrote, T. K. Eriksen, A. Görgen, T. W. Hagen, P. E. Koehler, M. Klintefjord, H. T. Nyhus, P. Papka, T. Renstrøm, S. Rose, E. Sahin, S. Siem, T. Tornyi

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

The 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.

Original languageEnglish
Pages (from-to)268-272
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume744
DOIs
Publication statusPublished - 1 May 2015
Externally publishedYes

Keywords

  • Maxwellian averaged cross-sections
  • Nuclear level densities
  • γ-ray strength functions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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