Abstract
The energy spectrum of diffuse hard X-rays measured in the range 10–40 keV shows a rather sharp change of slope. The logarithmic derivative of the spectrum changes around 20–30 keV by the increment significantly greater than 0.5 within an interval smaller than 50 keV.
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Fukada, Y., Hayakawa, S., Ikeda, M. et al. Rocket observation of energy spectrum of diffuse hard X-rays. Astrophys Space Sci 32, L1–L5 (1975). https://doi.org/10.1007/BF00646232
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DOI: https://doi.org/10.1007/BF00646232