Date of Award

6-1-1968

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Physics

Department

Physics

Physical Description

1 online resource (47 leaves)

Subjects

Mössbauer effect

DOI

10.15760/etd.17

Abstract

Precision measurements of the Mössbauer fraction of the 14.4 kev Fe⁵⁷ transition were made using the black, wide absorber technique. The Fe⁵⁷ was diffused, as a dilute Mössbauer impurity, into 99.995% purity single crystal chips of Pt, Pd and Cu. By comparing the Debye form of -ln f, corrected for anharmonicity, with our data, we extracted a high and low temperature Debye theta, as well as an anharmonicity coefficient, є, for the three materials. We estimated the accuracy of our data to be ± 1%. From the data we concluded that the Fe⁵⁷ in Cu has stronger force constants and is more anharmonic than pure Cu, while Fe⁵⁷ in Pt and Pd has smaller force constants and about the same anharmonicity as the pure host materials.

Description

Portland State College. Dept. of Physics

Persistent Identifier

http://archives.pdx.edu/ds/psu/8330

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