Capture gamma-ray libraries for nuclear applications

B. W. Sleaford, N. Summers, J. Escher, R. B. Firestone, S. Basunia, A. Hurst, M. Krticka, G. Molnár, T. Belgya, Zs Revay, H. D. Choi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The neutron capture reaction is useful in identifying and analyzing the gamma-ray spectrum from an unknown assembly as it gives unambiguous information on its composition. This can be done passively or actively where an external neutron source is used to probe an unknown assembly. There are known capture gamma-ray data gaps in the ENDF libraries used by transport codes for various nuclear applications. The Evaluated Gamma-ray Activation file (EGAF) is a new thermal neutron capture database of discrete line spectra and cross sections for over 260 isotopes that was developed as part of an IAEA Coordinated Research Project. EGAF has been used to improve the capture gamma production in ENDF libraries. For medium to heavy nuclei the quasi continuum contribution to the gamma cascades is not experimentally resolved. The continuum contains up to 90% of all the decay energy and is modeled here with the statistical nuclear structure code DICEBOX. This code also provides a consistency check of the level scheme nuclear structure evaluation. The calculated continuum is of sufficient accuracy to include in the ENDF libraries. This analysis also determines new total thermal capture cross sections and provides an improved RIPL database. For higher energy neutron capture there is less experimental data available making benchmarking of the modeling codes more difficult. We use CASINO, a version of DICEBOX that is modified for this purpose. This can be used to simulate the neutron capture at incident neutron energies up to 20 MeV to improve the gamma-ray spectrum in neutron data libraries used for transport modeling of unknown assemblies. PACS numbers: 25.40.Lw, 24.60.Dr, 29.85.+c.

Original languageEnglish
Pages (from-to)1473-1478
Number of pages6
JournalJournal of the Korean Physical Society
Volume59
Issue number23
DOIs
Publication statusPublished - Aug 2011

Fingerprint

gamma rays
neutrons
gamma ray spectra
nuclear structure
continuums
files
assembly
activation
research projects
heavy nuclei
neutron sources
thermal neutrons
absorption cross sections
assemblies
line spectra
energy
cascades
isotopes
evaluation
probes

Keywords

  • ENDF
  • ND2010
  • Nuclear data

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Sleaford, B. W., Summers, N., Escher, J., Firestone, R. B., Basunia, S., Hurst, A., ... Choi, H. D. (2011). Capture gamma-ray libraries for nuclear applications. Journal of the Korean Physical Society, 59(23), 1473-1478. https://doi.org/10.3938/jkps.59.1473

Capture gamma-ray libraries for nuclear applications. / Sleaford, B. W.; Summers, N.; Escher, J.; Firestone, R. B.; Basunia, S.; Hurst, A.; Krticka, M.; Molnár, G.; Belgya, T.; Revay, Zs; Choi, H. D.

In: Journal of the Korean Physical Society, Vol. 59, No. 23, 08.2011, p. 1473-1478.

Research output: Contribution to journalArticle

Sleaford, BW, Summers, N, Escher, J, Firestone, RB, Basunia, S, Hurst, A, Krticka, M, Molnár, G, Belgya, T, Revay, Z & Choi, HD 2011, 'Capture gamma-ray libraries for nuclear applications', Journal of the Korean Physical Society, vol. 59, no. 23, pp. 1473-1478. https://doi.org/10.3938/jkps.59.1473
Sleaford BW, Summers N, Escher J, Firestone RB, Basunia S, Hurst A et al. Capture gamma-ray libraries for nuclear applications. Journal of the Korean Physical Society. 2011 Aug;59(23):1473-1478. https://doi.org/10.3938/jkps.59.1473
Sleaford, B. W. ; Summers, N. ; Escher, J. ; Firestone, R. B. ; Basunia, S. ; Hurst, A. ; Krticka, M. ; Molnár, G. ; Belgya, T. ; Revay, Zs ; Choi, H. D. / Capture gamma-ray libraries for nuclear applications. In: Journal of the Korean Physical Society. 2011 ; Vol. 59, No. 23. pp. 1473-1478.
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