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

Abstract

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.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [1];  [3];  [4];  [1];  [1];  [1];  [1];  [5]; ;
+ Show Author Affiliations
  1. Univ. of Oslo, Olso (Norway). Dept. of Physics.
  2. Univ. of Oslo, Olso (Norway). Dept. of Physics; Univ. of Stellenbosch, Stellenbosch (South Africa)
  3. Air Force Technical Applications Center, Patrick Air Force Base, FL (United States)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. Univ. of Oslo, Olso (Norway). Dept. of Physics; Institute of Nuclear Research of the Hungarian Academy of Science, Debrecen (Hungary)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1210039
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
EPJ Web of Conferences
Additional Journal Information:
Journal Volume: 93; Journal ID: ISSN 2100-014X
Publisher:
EDP Sciences
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

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., Schwengner, R., and Zuber, K. Observation of low-lying resonances in the quasicontinuum of 195,196Pt and enhanced astrophysical reaction rates. United States: N. p., 2015. Web. doi:10.1051/epjconf/20159301039.
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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., Schwengner, R., & Zuber, K. Observation of low-lying resonances in the quasicontinuum of 195,196Pt and enhanced astrophysical reaction rates. United States. https://doi.org/10.1051/epjconf/20159301039
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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., Schwengner, R., and Zuber, K. Thu . "Observation of low-lying resonances in the quasicontinuum of 195,196Pt and enhanced astrophysical reaction rates". United States. https://doi.org/10.1051/epjconf/20159301039. https://www.osti.gov/servlets/purl/1210039.
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@article{osti_1210039,
title = {Observation of low-lying resonances in the quasicontinuum of 195,196Pt and enhanced astrophysical reaction rates},
author = {Giacoppo, F. and Bello Garrote, F. L. and Eriksen, T. K. and Görgen, A. and Guttormsen, M. and Hagen, T. W. and Larsen, A. C. and Kheswa, B. V. and Klintefjord, M. and Koehler, P. E. and Moretto, L. G. and Nyhus, H. T. and Renstrøm, T. and Sahin, E. and Siem, S. and Tornyi, T. G. and Schwengner, R. and Zuber, K.},
abstractNote = {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.},
doi = {10.1051/epjconf/20159301039},
journal = {EPJ Web of Conferences},
number = ,
volume = 93,
place = {United States},
year = {Thu May 28 00:00:00 EDT 2015},
month = {Thu May 28 00:00:00 EDT 2015}
}
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https://doi.org/10.1051/epjconf/20159301039
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    Works referencing / citing this record:

    Examination of photon strength functions and nuclear level density in Pt 196 from the γ -ray spectra measured at the DANCE facility
    journal, February 2020

    Reference database for photon strength functions
    journal, October 2019

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