Effect of Pressure on the Mössbauer Effect of 57Fe in Nickel Metal

Abstract
The Mössbauer spectrum of 57Fe in nickel metal was studied to a pressure of 80 kbar. A peak in the internal field at the 57Fe nucleus was observed at 10 kbar, followed by a slow decrease up to 80 kbar. The initial increase of the internal field with pressure is given by d lnH/dP=10.2×10−4 kbar−1. The isomer shift over the entire pressure range is given by d(IS)/dP=−4.15×10−5 cm/sec/kbar. These results are discussed as they relate to other pressure studies on the properties of pure nickel and iron.