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Inner Bremsstrahlung from
Phys. Rev. 100, 145 – Published 1 October, 1955
DOI: https://doi.org/10.1103/PhysRev.100.145
Abstract
The continuous gamma-ray spectrum (inner bremsstrahlung), accompanying orbital electron capture in , has been reinvestigated by the method of scintillation spectroscopy with particular emphasis on the low energy region. The absorption between the source and the NaI crystal is only due to two one-mil Al foils. After correcting for NaI crystal detection efficiency, the geometrical factor, the ratio of photoelectric cross section to total cross section, Compton electron backscattering, iodine x-ray escape, absorption and resolution, it is found that the intensity of the extremely low-energy photons is much greater than can be accounted for by Morrison and Schiff's treatment. A better agreement can be obtained if one considers the -electron capture, and takes the Coulomb effect into consideration as shown by Glauber and Martin.
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