1962•OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)Requires access
DOSIMETRY OF SOFT X RAYS AND BIOLOGICAL EXPERIMENTATION
Julien Garsou
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Abstract
A study was made to determine what part of the spectra of x rays was preferentially absorbed by water 2.5 mm thick. The results show that 49% of the intensities put out by an Emachlett tube operating at 50 kv is absorbed by the water shield; 67% of this absorbed energy is furnished by photons with energy from 4.6 to 11.7 kev. The readings of the Phillips dosimetry provided with the ionization chamber should be theoretically given a coefficient of 1.018 when the measurement is made directly on the tube radiation; the correction is therefore negligible. The correction is zero if the measurement is related to the radiation transmitted by 2.5 mm of water. (J.S.R.)