Measurements and calculations of $^{238}\mathrm{U}(n,xn\ensuremath{\gamma})$ partial $\ensuremath{\gamma}$-ray cross sections

Measurements and calculations of ${}^{238}U (n, x n γ)$ partial $γ$ -ray cross sections

N. Fotiades, G. D. Johns, R. O. Nelson, M. B. Chadwick, M. Devlin, M. S. Wilburn, P. G. Young, J. A. Becker, D. E. Archer, L. A. Bernstein, P. E. Garrett, C. A. McGrath, D. P. McNabb, and W. Younes

Phys. Rev. C 69, 024601 – Published 6 February 2004

Abstract

Absolute partial cross sections for production of 45 discrete $γ$ rays in the ${}^{238}U (n, x n γ)$ reactions with $x ⩽ 4$ are reported for incident-neutron energies in the range $1 MeV < E_{n} < 100 MeV$ . A germanium-detector array for $γ$ -ray detection and the “white”-neutron source at LANSCE∕WNR were used for the measurement. The energy of the incident neutrons was determined using the time-of-flight technique. The data are compared with previous measurements and with theoretical predictions up to $E_{n} = 30 MeV$ from the GNASH reaction model. The combination of experimental results with theoretical calculations provides a means to deduce the ${}^{238}U (n, n^{'})$ reaction cross section.