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Absolute Oscillator Strengths for Iron, Copper, Cadmium, and Gold Measured by the Atomic Beam Method


Ashenfelter, Robert Carl (1967) Absolute Oscillator Strengths for Iron, Copper, Cadmium, and Gold Measured by the Atomic Beam Method. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/4V4J-S550.


Absolute f-values for 7 transitions in the first spectra of 4 elements have been measured using the atomic beam absorption technique. The equivalent widths of the absorption lines are measured with a photoelectric scanner and the atomic beam density is determined by continuously weighing a part of it with a sensitive automatic microbalance. The complete theory is presented and corrections are calculated to cope with gas absorption by the deposit on the microbalance pan and atoms which do not stick to the pan. An additional correction for the failure of the assumption of effusive flow in the formation of the atomic beam at large densities has been measured experimentally.

The following f-values were measured:

Fe: fλ3720 = 0.0430 ± 8%

Cu: fλ3247 = 0.427 ± 4.5%, fλ3274 = 0.206 ± 4.7%, fλ2492 = 0.0037 ± 9%

Cd: fλ3261 = 0.00190 ± 7%, fλ2288 = 1.38 ± 12%

Au: fλ2428 = 0.283 ± 5.3%

Comparison with other accurately measured f-values, where they exist, shows agreement within experimental errors.

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):
  • King, Robert Burnett
Thesis Committee:
  • Unknown, Unknown
Defense Date:25 May 1967
Funding AgencyGrant Number
Office of Naval Research (ONR)Nonr 200(49)
Record Number:CaltechTHESIS:11022015-114944851
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9266
Deposited On:03 Nov 2015 15:46
Last Modified:11 Mar 2024 22:25

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