Computer Science – Sound
Scientific paper
Oct 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ap%26ss..37..115m&link_type=abstract
Astrophysics and Space Science, vol. 37, Oct. 1975, p. 115-130.
Computer Science
Sound
2
Balloon Sounding, Diffuse Radiation, Energy Spectra, Gamma Rays, X Ray Spectra, Atmospheric Radiation, Curve Fitting, Least Squares Method, Primary Cosmic Rays, Radiation Counters, X Ray Astronomy, X Ray Density Measurement
Scientific paper
Balloon observations of the cosmic diffuse component of hard X-rays were conducted with two independent directional counters in two energy bands, from 20 keY to 120 keY and from 90 keY to 4 MeV. The build-up effect of primary X-rays and the altitude dependence of atmospheric X-rays were properly taken into account in the analysis of the growth curves. These two experiments gave consistent results in the overlapping energy region. If the differential energy spectrum of the photon flux is represented by a power law E2, the value of ~ is 2.3 up to 100 keV, gradually increases to 2.8 at about 500 keY, and decreases to 2.0 thereabove. The spectrum above 300 keY is in parallel to the Apollo-15 spectrum, whereas the absolute intensity is somewhat smaller. The shape of the spectrum suggests the necessity of a multi-component theory on the origin of cosmic diffuse X-rays
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