Precise γ-Ray Energy Standards
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.
KeywordsLattice Spacing Corner Cube Crystal Spectrometer Curve Crystal Flat Crystal
Unable to display preview. Download preview PDF.
- 5.R.D. Deslattes, A. Henins, C.L. Carroll, and H.A. Bowman, Phys. Rev. Lett. 36, 898 (C) (1976).Google Scholar
- 7.M. Ando, D. Bailey, and M. Hart, Acta. Cryst. A34, 484 (1978). 439Google Scholar
- 8.J.W. Berthold III, S.F. Jacobs, and M.A. Norton, Appl. Opt. 15, 1898 (1976).Google Scholar
- 11.E.G. Kessler, Jr., R.D. Deslattes, and A. Henins, to be published.Google Scholar
- 14.W. Schwitz, Doctoral Thesis, University of Fribourg, Switzerland, 1977.Google Scholar
- 15.R.G. Helmer, R.C. Greenwood, and R.J. Gehrke, Nucl. Instrum. Meth., to be published.Google Scholar
- 21.B.N. Taylor, NBS (private communication).Google Scholar