SYNCHROTRON MOSSBAUER-SPECTROSCOPY OF POWDER SAMPLES

Synchrotron Mossbauer spectroscopy, SMS, is an emerging technique that allows fast and accurate determination of hyperfine field parameters similar to conventional Mossbauer spectroscopy with radioactive source s. This new technique, however, is qualitatively different from Mossba uer spectroscopy in terms of equipment, methodology, and analysis to w arrant a new name. In this paper, we report on isomer shift and quadru pole splitting measurements of Mohr's salt, Fe(NH4)(2)(SO4)(2) . 6H(2) O for demonstration purposes. Theoretical calculations were performed and compared to experiments both in energy and time domain to demonstr ate the influence of thickness distribution and preferential alignment of powder samples. Such measurements may prove to be useful when the data collection times are reduced to few seconds in the third generati on, undulator based synchrotron radiation sources.