Absolute Measurement of Average Energy lost by Very Soft X-rays per Ion Pair in 
Air

Rajewsky, Boris; Lang, Dimitrij

doi:10.1038/190249b0

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Absolute Measurement of Average Energy lost by Very Soft X-rays per Ion Pair in Air

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Rajewsky, Boris
Max Planck Institute of Biophysics, Max Planck Society;

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Lang, Dimitrij
Max Planck Institute of Biophysics, Max Planck Society;

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Citation

Rajewsky, B., & Lang, D. (1961). Absolute Measurement of Average Energy lost by Very Soft X-rays per Ion Pair in Air. Nature, 190(4772), 249-250. doi:10.1038/190249b0.

Cite as: https://hdl.handle.net/21.11116/0000-0008-FAB8-F

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-rays.