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Experimental studies of conversion coefficients in some deformed nuclei

Citation

Edwards, William Farrell (1960) Experimental studies of conversion coefficients in some deformed nuclei. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-10042005-102708

Abstract

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The Mark I curved-crystal spectrometer at the California Institute of Technology was calibrated for intensity measurements. The predominant correction to the relative intensities is due to the energy dependent reflectivity of the curved quartz crystal which was found to vary as [...] over the energy range 60 kev [...] 400 kev.

Conversion coefficients and energies of transitions in the following deformed nuclei were measured: [...], [...], [...], and [...]. Three E1 transitions with anomalous conversion coefficients were studied. The [...], [...], and M coefficients of the K-forbidden 57.54-kev transition in [...] were found to be 0.458 ± 0.036, 0.084 ± 0.012, and 0.134 ± 0.015 respectively as compared with the theoretical E1 values of Rose (6) of 0.163, 0.062, and 0.086. The anomalous nature of the 152.41-kev transition in [...] is confirmed with the present value of the K-conversion coefficient of 0.05. The theoretical E1 value is 0.11. The K-conversion coefficient of the 72.00-kev transition in [...] is [...] whereas the theoretical E1 value is 0.52. This anomaly might be explained by the fact that the transition energy differs from the K binding energy by only 0.34 kev.

The four E2 transitions in [...] show slight deviation from the theory. With the exception of the 93.33-kev transition the K-conversion coefficients are all about 10% low. Furthermore, with respect to the theoretical values, the L coefficients seem to follow a fairly smooth curve, decreasing as a function of energy and having a maximum deviation from the theoretical values of 12%.

Item Type:Thesis (Dissertation (Ph.D.))
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • DuMond, Jesse William Monroe
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1960
Record Number:CaltechETD:etd-10042005-102708
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-10042005-102708
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3911
Collection:CaltechTHESIS
Deposited By: Imported from ETD-db
Deposited On:04 Oct 2005
Last Modified:26 Dec 2012 03:03

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