Improved capture γ-ray libraries for nuclear applications

A. M. Hurst, B. W. Sleaford, R. B. Firestone, N. C. Summers, Zs Revay, L. Szentmiklósi, S. Basunia, T. Belgya, J. E. Escher, M. Krticka

Research output: Conference contribution

Abstract

The neutron-capture reaction is of fundamental use in identifying and analyzing the γ-ray spectrum from an unknown object as it gives unambiguous information on exactly what isotopes are absorbing the neutrons. There are many applications where this can be used passively (nonproliferation), or actively where an external neutron source is used to probe an unknown assembly (planetary studies). There are known capture-γ data gaps in the ENDF libraries used by transport codes for various nuclear applications. A new database, EGAF, containing thermal neutron-capture γ-ray data is used to improve the capture-7 information in the ENDF libraries. For many nuclei the unresolved quasi-continuum part of the γ cascade is not available experimentally. In this work, we have modeled this contribution using the Monte Carlo statistical-decay code DICEBOX, in addition to improving level-scheme evaluations. For capture of higher-energy neutrons there is little experimental data available, making evaluation of modeling codes problematic. We plan to continue the DICEBOX approach through the resolved resonance region where spin and parity information is partially known. In the unresolved resonance region, and up to 20-MeV incident neutron energy, we are applying Hauser-Feshbach models to predict the capture-γ spectrum.

Original languageEnglish
Title of host publicationCERN-Proceedings
PublisherCERN
Pages345-350
Number of pages6
ISBN (Print)9789290833826
Publication statusPublished - 2013
Event13th International Varenna Conference on Nuclear Reaction Mechanisms, NRM 2012 - Varenna, Italy
Duration: jún. 11 2012jún. 15 2012

Other

Other13th International Varenna Conference on Nuclear Reaction Mechanisms, NRM 2012
CountryItaly
CityVarenna
Period6/11/126/15/12

Fingerprint

rays
neutrons
evaluation
neutron sources
thermal neutrons
cascades
parity
isotopes
assembly
continuums
nuclei
energy
probes
decay

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Hurst, A. M., Sleaford, B. W., Firestone, R. B., Summers, N. C., Revay, Z., Szentmiklósi, L., ... Krticka, M. (2013). Improved capture γ-ray libraries for nuclear applications. In CERN-Proceedings (pp. 345-350). CERN.

Improved capture γ-ray libraries for nuclear applications. / Hurst, A. M.; Sleaford, B. W.; Firestone, R. B.; Summers, N. C.; Revay, Zs; Szentmiklósi, L.; Basunia, S.; Belgya, T.; Escher, J. E.; Krticka, M.

CERN-Proceedings. CERN, 2013. p. 345-350.

Research output: Conference contribution

Hurst, AM, Sleaford, BW, Firestone, RB, Summers, NC, Revay, Z, Szentmiklósi, L, Basunia, S, Belgya, T, Escher, JE & Krticka, M 2013, Improved capture γ-ray libraries for nuclear applications. in CERN-Proceedings. CERN, pp. 345-350, 13th International Varenna Conference on Nuclear Reaction Mechanisms, NRM 2012, Varenna, Italy, 6/11/12.
Hurst AM, Sleaford BW, Firestone RB, Summers NC, Revay Z, Szentmiklósi L et al. Improved capture γ-ray libraries for nuclear applications. In CERN-Proceedings. CERN. 2013. p. 345-350
Hurst, A. M. ; Sleaford, B. W. ; Firestone, R. B. ; Summers, N. C. ; Revay, Zs ; Szentmiklósi, L. ; Basunia, S. ; Belgya, T. ; Escher, J. E. ; Krticka, M. / Improved capture γ-ray libraries for nuclear applications. CERN-Proceedings. CERN, 2013. pp. 345-350
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