FIER: Software for analytical modeling of delayed gamma-ray spectra


Journal Article

© 2018 Elsevier B.V. A new software package, the Fission Induced Electromagnetic Response (FIER) code, has been developed to analytically predict delayed γ-ray spectra following fission. FIER uses evaluated nuclear data and solutions to the Bateman equations to calculate the time-dependent populations of fission products and their decay daughters resulting from irradiation of a fissionable isotope. These populations are then used in the calculation of γ-ray emission rates to obtain the corresponding delayed γ-ray spectra. FIER output was compared to experimental data obtained by irradiation of a 235U sample in the Godiva critical assembly. This investigation illuminated discrepancies in the input nuclear data libraries, showcasing the usefulness of FIER as a tool to address nuclear data deficiencies through comparison with experimental data. FIER provides traceability between γ-ray emissions and their contributing nuclear species, decay chains, and parent fission fragments, yielding a new capability for the nuclear science community.

Full Text

Cited Authors

  • Matthews, EF; Goldblum, BL; Bernstein, LA; Quiter, BJ; Brown, JA; Younes, W; Burke, JT; Padgett, SW; Ressler, JJ; Tonchev, AP

Published Date

  • May 21, 2018

Published In

Volume / Issue

  • 891 /

Start / End Page

  • 111 - 117

International Standard Serial Number (ISSN)

  • 0168-9002

Digital Object Identifier (DOI)

  • 10.1016/j.nima.2018.02.072

Citation Source

  • Scopus