Data evaluation methods and improvements to the neutron-capture γ-ray spectrum

A. M. Hurst, R. B. Firestone, N. C. Summers, B. W. Sleaford, Zs Revay, M. Krtička, T. Belgya, M. S. Basunia, R. Capote, H. Choi, D. Dashdorj, J. E. Escher, A. Nichols, L. Szentmiklósi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Improved neutron-capture γ-ray spectra, not only of interest to the nuclear structure and reactions communities, are needed in a variety of applied and non-proliferation programs. This requires an evaluation of the existing experimental capture-γ data. Elemental neutron-capture data taken from direct measurements at the Budapest Reactor have been used to collate the Evaluated Gamma-ray Activation File, a database of capture γ-ray cross sections. These cross sections are then compared to Monte Carlo simulations of γ-ray emission following the thermal neutron-capture process using the statistical-decay code DICEBOX. The aim of this procedure is to obtain the total radiative neutron-capture cross section and confidently increase the number of levels and γ rays that can be assigned to a given isotope in the neutron data libraries. To achieve these goals and provide as complete information as possible in the neutron data libraries, it is also necessary to remain current with recent advances in nuclear structure physics and ensure that the latest data in the Evaluated Nuclear Structure Data File has been taken into consideration. This way an optimal level scheme can be derived by comparison with simulations and available experimental data. New information derived from this study can then be used to improve the nuclear structure and reactions databases with more-complete level schemes, and indeed, provide reliable and accurate input to a variety of applications which require this information. Recent results from neutron capture on the stable tungsten isotopes 182,183,184,186W are presented to illustrate the evaluation process.

Original languageEnglish
Title of host publicationSecond International Ulaanbaatar Conference on Nuclear Physics and Applications
Pages24-31
Number of pages8
DOIs
Publication statusPublished - Aug 8 2011
Event2nd International Ulaanbaatar Conference on Nuclear Physics and Applications - Ulaanbaatar, Mongolia
Duration: Jul 26 2010Jul 30 2010

Publication series

NameAIP Conference Proceedings
Volume1342
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other2nd International Ulaanbaatar Conference on Nuclear Physics and Applications
CountryMongolia
CityUlaanbaatar
Period7/26/107/30/10

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Keywords

  • DICEBOX
  • Data evaluation
  • Monte Carlo simulations
  • Wcompounds
  • thermal neutron capture
  • total radiative capture cross sections
  • γ-ray cross sections

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Hurst, A. M., Firestone, R. B., Summers, N. C., Sleaford, B. W., Revay, Z., Krtička, M., Belgya, T., Basunia, M. S., Capote, R., Choi, H., Dashdorj, D., Escher, J. E., Nichols, A., & Szentmiklósi, L. (2011). Data evaluation methods and improvements to the neutron-capture γ-ray spectrum. In Second International Ulaanbaatar Conference on Nuclear Physics and Applications (pp. 24-31). (AIP Conference Proceedings; Vol. 1342). https://doi.org/10.1063/1.3583162