The concept of centro‐frequency and the density in Mössbauer studies of solid krypton

The concept of the centro‐frequency of the lattice vibrational spectra has been found useful in determining the Mössbauer characteristic temperature of solid krypton. The calculated zero‐point energy is in agreement with experiment and alternative theoretical treatments. The density of the solid exhibits a definite correlation with the Mössbauer parameters and acts as a significant link in the linear correlation between the recoilless strength lg f and the Mössbauer energy shift. The lattice anharmonicity parameter as evaluated from the experimental data is seen to compare favourably with the product of the temperature dependent Grüneisen parameter and the volume expansion coefficient. A simple correlation of the anharmonicity parameter with the Mössbauer characteristic temperature is indicated which seems to be useful for the determination of the former.