Cohen, Richard Lewis (1962) Mössbauer Effect in Thulium 169. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechTHESIS:07262011-095356834
The recoil-free resonance absorption phenomenon has been used to study the 8.4 kev gamma ray which is emitted in the decay of the first excited state of Tm^(169) which is populated by the beta decay of Er^(169) . With sources and absorbers in various chemical forms, hyperfine structures which are strongly temperature dependent have been obtained. These have been studied with the aim of producing a source emitting an unsplit line. The observed absorption patterns are explained on the basis of a quadrupole interaction resulting from the interaction of the nuclear quadrupole moment of the excited state of Tm^(169) with the electric field gradient produced by the surrounding electrons and the crystal field. Arguments are given to show that the magnetic hyperfine interaction is expected to be negligible.
|Item Type:||Thesis (Dissertation (Ph.D.))|
|Degree Grantor:||California Institute of Technology|
|Division:||Physics, Mathematics and Astronomy|
|Thesis Availability:||Public (worldwide access)|
|Defense Date:||1 January 1962|
|Default Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Benjamin Perez|
|Deposited On:||26 Jul 2011 17:37|
|Last Modified:||26 Dec 2012 04:37|
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