Abstract
FIG. 1 gives a survey of measurements made so far of W, the average energy lost by photons and particles per ion pair in air. At energies exceeding 10 keV. W is practically constant. At less than 10 keV. a tendency to higher values of W is indicated. The fairly large discrepancies between some of the results, especially at low energies, caused us to carry out an absolute measurement of W with very soft X-rays1.
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References
Lang, D., Dessertation Frankfurt am Main (1959).
Küstner, H., Z. Physik, 70, 324 (1931).
Bunde, E., Lang, D., Pohlit, W., and Sewkor, A., Z. Naturforsch., 9 a, 129 (1954).
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RAJEWSKY, B., LANG, D. Absolute Measurement of Average Energy lost by Very Soft X-rays per Ion Pair in Air. Nature 190, 249–250 (1961). https://doi.org/10.1038/190249b0
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DOI: https://doi.org/10.1038/190249b0
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