Mössbauer Effect ofFe37in a Cobalt Single Crystal

Abstract

The M\ossbauer effect of ${\mathrm{Fe}}^{57}$ in a single crystal of cobalt has been observed. The quadrupole coupling ${e}^{2}\mathrm{Qq}$ was measured to be -0.064 mm/sec, and the hyperfine field was found to be isotropic and equal to -316.6\ifmmode\pm\else\textpm\fi{}2.5 G. The significance of these results is discussed in relation to the theory of hyperfine fields in metals. The ratio of the magnetic moments of the excited and ground states of ${\mathrm{Fe}}^{57}$ was measured to be 1.7135\ifmmode\pm\else\textpm\fi{}0.0015.