Coincidence Mössbauer Spectroscopy
Coincidence Mössbauer spectroscopy (CMS) is a technique which merges the methods of the Mössbauer effect and γ-γ angular correlation. The ultimate goal is to obtain solid-state information which would otherwise be unavailable. The usual procedure is to observe two γ-rays in delayed coincidence. The first γ-ray signals the formation of the Mössbauer state, the second γ-ray signals its decay. The Mössbauer absorption spectrum using a particular delay time T is, in the simplest cases, characteristic of T. This is called “time filtering.” Experimental and computational techniques used in CMS are presented. Experimental data are shown that can be explained in terms of time filtering. Additional data indicate the improved resolution and increased percentage effect obtained using CMS. Numerical results are given so that one can estimate the necessary T needed to obtain a particular linewidth. Difficulties associated with interpreting multiline spectra are pointed out. A brief discussion of possible uses of CMS is also given.
KeywordsPerturbed Angular Correlation M6ssbauer Spectrum Mossbauer Spectrum Absorber Thickness Accidental Coincidence
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- 4.D. W. Hamill and G. R. Hoy, Bull. Am. Phys. Soc. 13:179 (1968).Google Scholar
- 5.K. Albrecht, U. Hauser, and W. Neuwirth, in Hyper fine Structure and Nuclear Radiations, E. Matthias and D. A. Shirley, eds. (North-Holland Publishing Co., Amsterdam, 1968).Google Scholar
- 11.A. H. Muir, Jr., K. J. Ando, and H. M. Coogan (eds.), Mossbauer Effect Data Index (Interscience Publishers, New York, 1966).Google Scholar
- 12.M. Blume, in Hyperfine Structure and Nuclear Radiations, E. Matthias and D. A. Shirley, eds. (North-Holland Publishing Co., Amsterdam, 1968).Google Scholar
- 13.K. Siegbahn (ed.), αβγ Ray Spectroscopy, Vols. 1 and 2 (North-Holland Publishing Co., Amsterdam, 1968).Google Scholar
- 16.D. W. Hamill, Ph.D. Dissertation, Boston University, 1969, unpublished.Google Scholar
- 18.E. Karlesson, E. Matthias, and K. Siegbahn (eds.), Perturbed Angular Correlations, (North-Holland Publishing Co., Amsterdam, 1964), p. 329.Google Scholar
- 24.A. J. Freeman, in Hyperfine Structure and Nuclear Radiations, E. Matthias and D. A. Shirley, eds. (North-Holland Publishing Co., Amsterdam 1968).Google Scholar
- 25.E. Obenshain, in Mossbauer Effect Methodology, Vol. 4, I. J. Gruverman, ed. (Plenum Press, New York, 1968).Google Scholar