Level density of 57Co.

Abstract

Levels in [sup 57]Co have been studied in the region of resolved levels ([ital E][lt]5.5 MeV) with measurements of the [sup 57]Fe([ital p],[ital n])[sup 57]Co neutron spectrum with resolution [Delta][ital E][similar to]5 keV. Seventeen previously unknown levels are located. Level density parameters in the continuum region are deduced from thick target measurements of the same reaction and additional level density information is deduced from Ericson fluctuation studies of the reaction [sup 56]Fe([ital p],[ital n])[sup 56]Co. A set of level density parameters is found which describes the level density of [sup 57]Co at energies up to 14 MeV. Efforts to obtain level density information from the [sup 56]Fe([ital d],[ital n])[sup 57]Co reaction were unsuccessful, but estimates of the fraction of the deuteron absorption cross section corresponding to compound nucleus formation are obtained.