Abstract
Broser and Kallmann1 have shown that mono-energetic alpha-particles give pulses of the same height in a scintillation counter, and that the pulse-height is proportional to the energy of the alpha-particles. It is found in studying the pulses for some beta-radiating substances that there is proportionality between pulse-height and energy also in this case. The same result is obtained when studying the pulse-height from the gamma-rays emitted by different substances. There is, in this case, a continuous distribution of pulses from zero to a certain maximum height which corresponds to the continuous distribution of Compton electrons produced in the absorption of the gamma-rays. By determination of the end-points of the distributions, a rough measure is given of the energy of the gamma-rays. Recently Jordan and Bell2 have published some measurements of that kind. This method gives rather uncertain results, especially for gamma-spectra with more than one energy. I have therefore tried to determine the pulse-height corresponding to those photo-electrons which are created at the absorption of the gamma-rays in the phosphor.
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References
Broser, I., and Kallmann, H., Nature, 183, 20 (1949).
Jordan, W. H., and Bell, P. R., Nucleonics (Oct. 1949).
Mattauch–Flammersfeld, “Isotopenbericht” (1949).
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JOHANSSON, S. Measurements of the Energy of Beta- and Gamma-rays with a Scintillation Counter. Nature 165, 396 (1950). https://doi.org/10.1038/165396a0
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DOI: https://doi.org/10.1038/165396a0
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