Developments in capture-γ libraries for nonproliferation applications
oleh: Hurst A.M., Firestone R.B., Sleaford B.W., Bleuel D.L., Basunia M.S., Bečvář F., Belgya T., Bernstein L.A., Carroll J.J., Detwiler B., Escher J.E., Genreith C., Goldblum B.L., Krtička M., Lerch A.G., Matters D.A., McClory J.W., McHale S.R., Révay Zs., Szentmiklosi L., Turkoglu D., Ureche A., Vujic J.
| Format: | Article |
|---|---|
| Diterbitkan: | EDP Sciences 2017-01-01 |
Deskripsi
The neutron-capture reaction is fundamental for identifying and analyzing the γ-ray spectrum from an unknown assembly because it provides unambiguous information on the neutron-absorbing isotopes. Nondestructive-assay applications may exploit this phenomenon passively, for example, in the presence of spontaneous-fission neutrons, or actively where an external neutron source is used as a probe. There are known gaps in the Evaluated Nuclear Data File libraries corresponding to neutron-capture γ-ray data that otherwise limit transport-modeling applications. In this work, we describe how new thermal neutron-capture data are being used to improve information in the neutron-data libraries for isotopes relevant to nonproliferation applications. We address this problem by providing new experimentally-deduced partial and total neutron-capture reaction cross sections and then evaluate these data by comparison with statistical-model calculations.