Total cross section and resonance spectroscopy for n+86Kr.

Abstract

The neutron total cross section of $^{122}\mathrm{Sn}$ has been measured over the energy range 0.013 to 0.310 MeV. An R-matrix analysis has been performed to obtain resonance and average parameters which provide for a complete representation of the neutron entrance channels for the ${\mathit{s}}_{1/2}$, ${\mathit{p}}_{1/2}$, and ${\mathit{p}}_{3/2}$ contributions. The conventional s- and p-neutron strength functions have been determined to be 0.123\ifmmode\pm\else\textpm\fi{}0.023 and 2.0\ifmmode\pm\else\textpm\fi{}0.2, respectively (in units of ${10}^{\mathrm{\ensuremath{-}}4}$). Limits are placed on the average level spacings and strength functions for the individual partial wave components. The s-wave potential scattering radius has been determined to be 6.3\ifmmode\pm\else\textpm\fi{}0.1 fm. Average scattering functions, deduced from the average parameters, have been used to determine the real well depth of an optical model potential which reproduces these functions. We find, as have others, that the real well depth is parity dependent.