Neutron capture by the chromium isotopes

Abstract

Capture cross sections of the chromium isotopes have been measured at neutron energies up to 350 keV using the capture cross section facility at the 40 m station of the Oak Ridge Electron Linear Accelerator. Parameters have been derived for 180 resonances. A moderate correlation [p(г0n,гγ) - 0.45] is observed between reduced neutron widths n y and radiative widths for s-wave resonances. Calculations of valence widths show that valence capture can only account for the correlated component of the observed radiative widths. An additional mechanism such as a 2p-lh doorway state must therefore be occurring to explain the uncorrelated component.