Author

Smith

Date of Award

6-1968

Degree Name

Master of Arts

Department

Physics

First Advisor

Dr. L. D. Oppliger

Second Advisor

Dr. J. P. Dewitt

Access Setting

Masters Thesis-Open Access

Comments

Introduction

The Mössabauer effect may be used as a very sensitive form of high resolution spectroscopy, using low energy gamma-rays. Since its first observation in 1958, the Mössabauer effect has shown promise of becoming a useful tool in solid state physics and chemistry. In the present experiment Sn119m in the chemical form of Sn02 was used to study the spectra of several binary alloys of tin and indium. The concentration of tin was varied from 1.3% to 100% by weight.

Interest in indium was generated by discussions with Dr. John H. Kusmiss whose study of positron annihilation in indium shows anomalous features at temperatures approaching the melting point. Since indium has no isotope which exhibits the Mössabauer effect, it was decided to use Sn119 as a probe to see if any additional information about indium could be obtained using the Mössabauer effect. This proved impossible because the intensity of the spectrum resonance became too small to observe above room temperature. However, a marked dependence of isomer shift on tin concentration was noted and this is the study reported here.

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