Nuclear Electric Field Gradient and Mean-Square Displacement Tensors in Tellurium Metal

Abstract

The Mössbauer effect in Te single-crystal absorbers was studied along different crystal axes. Area ratios of the quadrupole doublet were used as an experimental parameter to extract the electric field gradient and mean-square displacement tensors. Experimental data, taken at the temperature of liquid helium, are well fitted by collinear principal axes for the electric field gradient and mean-square displacement tensors. The quadrupole splitting, asymmetry parameter, and mean-square displacement parameters are $\Delta E_q=7.74\mathrm{}\pm 0.10$ mm/sec, $\eta =0.64\mathrm{}\pm 0.04$, $〈x^2〉=〈y^2〉=〈z^2〉=(1.6\mathrm{}\pm 0.05){\lambda }^2$.