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Isotope Shift of the K(α1) X-Ray in Uranium


Brockmeier, Richard Taber (1966) Isotope Shift of the K(α1) X-Ray in Uranium. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/7Q11-2C69.


The first experimental evidence of the isotopic shift of electronic K x-rays has been found. A two-meter focal length curved-crystal diffraction spectrometer was used to measure the wavelengths of fluorescent K(alpha 1) x-rays from isotopically pure U233 and U238 samples. The difference in wavelengths was found to be 0.00228 +/- 0.00022 x-units. This corresponds to a 1.8 +/- 0.2 eV energy difference, the U233 x-ray being higher in energy. The result is discussed in terms of 1) the pure volume effect, 2) the even-odd staggering contributions, 3) the change of intrinsic quadrupole moments, and 4) the nuclear compressibility factor. Good agreement between the experimental result and theory is obtained by considering either the pure volume effect, or by considering the contributions of all four effects choosing the parameter for the nuclear compressibility somewhat higher than inferred from the optical isotope shift measurements.

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:
  • Unknown, Unknown
Defense Date:1 January 1966
Record Number:CaltechETD:etd-09102002-134023
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3420
Deposited By: Imported from ETD-db
Deposited On:11 Sep 2002
Last Modified:23 Feb 2024 00:09

Thesis Files

PDF (Brockmeier_r_1966.pdf) - Final Version
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