Precise γ-Ray Energy Standards

  • E. G. KesslerJr.
  • R. D. Deslattes
  • W. C. Sauder
  • A. Henins


A number of γ-ray energy standards have recently been remeasured with respect to a visible standard wavelength with an accuracy of about 0.5 ppm. These measurements which were made on a double axis flat crystal spectrometer established the γ-ray energy scale in the 50 keV to 1 MeV region about 40 times more accurately than it was previously known. This report describes the measurement steps involved in the visible to γ-ray comparison. Some results and applications of the results are presented. The extension of the measurement techniques developed for the γ-ray measurements to X-rays, higher energy γ-rays, and dense γ-ray spectra is briefly discussed.


Lattice Spacing Corner Cube Crystal Spectrometer Curve Crystal Flat Crystal 
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Copyright information

© Plenum Press, New York 1979

Authors and Affiliations

  • E. G. KesslerJr.
    • 1
  • R. D. Deslattes
    • 1
  • W. C. Sauder
    • 1
  • A. Henins
    • 1
  1. 1.Quantum Metrology GroupNational Bureau of StandardsUSA

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