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Measurement of Absolute f-Values for Iron Group Elements


Bell, Graydon Dee (1957) Measurement of Absolute f-Values for Iron Group Elements. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/ADRX-ZH91.


The preliminary results obtained with an atomic beam apparatus designed to measure absolute f-values for elements of the iron group were not in good agreement with results obtained by other techniques. In order to locate and eliminate sources of error in the atomic beam experiment each assumption made in the development of this technique has been analyzed and tested. Experimental methods used in this analysis and the conclusions which resulted are discussed in some detail. This thorough investigation of the experiment led to a number of modifications of the apparatus and improved techniques for making accurate measurements. These improvements and their effects upon the results are described. Atomic beam measurements of absolute f-values for resonance lines in the spectra of Cu I, Mn I, Fe I, and Cr I are presented and compared with values obtained by other investigators. An experimental curve of growth for one line of each element has been determined and compared with the theoretical curve of growth. The good agreement obtained indicates that the atomic beam method gives results which vary with experimental conditions as the theory predicts. Suggestions are given for further absolute f-value research using the atomic beam method.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:(Physics and Astronomy)
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Minor Option:Astronomy
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • King, Robert Burnett
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1957
Additional Information:Title varies in the 1957 Caltech commencement program: Measurement of Absolute f-Values for the Iron Group Elements
Record Number:CaltechETD:etd-07082004-133151
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2825
Deposited By: Imported from ETD-db
Deposited On:13 Jul 2004
Last Modified:15 Aug 2023 20:02

Thesis Files

PDF (Bell_gd_1957.pdf) - Final Version
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