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Transverse Polarization of Beta Particles from Polarized Nuclei


Markey, John Kevin (1985) Transverse Polarization of Beta Particles from Polarized Nuclei. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/dcqv-yv75.


In this thesis an experiment to measure the transverse polarization of electrons from the decay of polarized 60Co is presented. The result

[equation; see abstract in scanned thesis for details]

is consistent with the predicted polarization based on the V - A theory of the weak interaction and the Weinberg, Salam, Glashow model. The theoretical prediction is

[equation; see abstract in scanned thesis for details]


[equation; see abstract in scanned thesis for details].

This is the first measurement of the transverse polarization of beta particles from the decay of polarized nuclei. The polarization of the electrons was measured by scattering them from gold foil and detecting the scattering asymmetry predicted by Mott scattering theory. 60Co nuclei were polarized by embedding them in a ferromagnetic host where they feel a strong hyperfine field. The host foil was attached to a dilution refrigerator to lower the entropy of the nuclei and allow for nuclear polarization.

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):
  • Boehm, Felix H.
Thesis Committee:
  • Boehm, Felix H. (chair)
  • Feynman, Richard Phillips
  • Barnes, Charles A.
  • Preskill, John P.
Defense Date:7 February 1985
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
Record Number:CaltechTHESIS:01222019-150217091
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:11354
Deposited By: Mel Ray
Deposited On:28 Jan 2019 16:02
Last Modified:16 Apr 2021 23:31

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