Isomer shift in TiFe and a calibration of theFe57isomer shift

Abstract

The isomer shift for TiFe has been measured to be -0.145 ± 0.007 mm ${\sec }^{-1\mathrm{}}$. This measurement together with charge-density calculations for TiFe, Fe, ${\mathrm{Fe}}^{2+}$, and ${\mathrm{Fe}}^{3+}$ yields a value for the 14.4-keV ${}_{}{}^{57}{}_{}{}^{}\mathrm{Fe}$ calibration constant of $(-0.19\mathrm{}\pm 0.01)a_0^3$ mm ${\sec }^{-1\mathrm{}}$.