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Mössbauer Effect in Thulium 169


Cohen, Richard Lewis (1962) Mössbauer Effect in Thulium 169. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/F7HD-FD14.


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.))
Subject Keywords:(Physics)
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Mossbauer, Rudolf L.
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1962
Funding AgencyGrant Number
Atomic Energy CommissionUNSPECIFIED
Record Number:CaltechTHESIS:07262011-095356834
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6546
Deposited By: Benjamin Perez
Deposited On:26 Jul 2011 17:37
Last Modified:28 Nov 2023 00:12

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