Nuclear electric field gradient and mean-square displacement tensors in tellurium metal

The Mossbauer 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 +/- 0.10 mm/sec, eta = 0.64 +/- 0.04, (x(2)) = (y(2)) = (z(2)) = (1.6 +/- 0.05)(lambda) over bar (2).