Observation of low-lying resonances in the quasicontinuum of 195,196Pt and enhanced astrophysical reaction rates

Giacoppo F.; Bello Garrote F. L.; Eriksen T. K.; Görgen A.; Guttormsen M.; Hagen T. W.; Larsen A. C.; Kheswa B. V.; Klintefjord M.; Koehler P. E.; Moretto L. G.; Nyhus H. T.; Renstrøm T.; Sahin E.; Siem S.; Tornyi T. G.

doi:10.1051/epjconf/20159301039

EPJ Web of Conferences (Jan 2015)

Observation of low-lying resonances in the quasicontinuum of 195,196Pt and enhanced astrophysical reaction rates

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

Affiliations

Giacoppo F.: Department of Physics, University of Oslo
Bello Garrote F. L.: Department of Physics, University of Oslo
Eriksen T. K.: Department of Physics, University of Oslo
Görgen A.: Department of Physics, University of Oslo
Guttormsen M.: Department of Physics, University of Oslo
Hagen T. W.: Department of Physics, University of Oslo
Larsen A. C.: Department of Physics, University of Oslo
Kheswa B. V.
Klintefjord M.: Department of Physics, University of Oslo
Koehler P. E.: Air Force Technical Applications Center, Patrick Air Force Base
Moretto L. G.: Lawrence Berkeley National Laboratory
Nyhus H. T.: Department of Physics, University of Oslo
Renstrøm T.: Department of Physics, University of Oslo
Sahin E.: Department of Physics, University of Oslo
Siem S.: Department of Physics, University of Oslo
Tornyi T. G.

DOI: https://doi.org/10.1051/epjconf/20159301039
Journal volume & issue: Vol. 93
p. 01039

Abstract

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An excess of strength on the low-energy tail of the giant dipole resonance recently has been observed in the γ-decay from the quasicontinuum of 195,196Pt. The nature of this phenomenon is not yet fully investigated. If this feature is present also in the γ-ray strength of the neutron-rich isotopes, it can affect the neutron-capture reactions involved in the formation of heavy-elements in stellar nucleosynthesis. The experimental level density and γ-ray strength function of 195,196Pt are presented together with preliminary calculations of the corresponding neutron-capture cross sections.

Published in EPJ Web of Conferences

ISSN: 2100-014X (Online)
Publisher: EDP Sciences
Country of publisher: France
LCC subjects: Science: Physics
Website: http://www.epj-conferences.org/

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