Optimization of the geometric conditions in the absorption M'ossbauer experiment

The article is devoted to the development of methodical recommendations for selection of the optimum geometric conditions in the Mössbauer experiment. These conditions allow user to get the spectrum with the largest aperture ratio and with minimal distortion of spectral lines. Mössbauer spectra of α-Fe with different collimation of gamma-ray beam were simulated. For this purpose we calculated the transmission integral taking into account geometrical parameters. Analysis the dependence of distortion spectral lines on the resonant velocity was done. The basic requirements for the geometrical conditions of the experiment were presented. We calculated the dependence of the critical angle divergence from the line position in the Mössbauer spectrum. This angle provides that the shift of lines and their widths don’t exceed 10% of natural width. The obtained dependence allows the experimenter to select geometrical conditions that don’t lead to a significant distortion of the spectral lines. These conditions are required for use in Mossbauer spectroscopy for qualitative and quantitative analysis.