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J Radiat Prot > Volume 4(1); 1979 > Article
Journal of Radiation Protection 1979;4(1):21-0.
단일산란근사법(單一散亂近似法)에 의한 공기중(空氣中) 산란방사선량(散亂放射線量)의 계산(計算)
육종철;하정우;이재기;문석형;
Calculation of the Air-Scattering Dose Rate by the Single Scattering Approximation
Yook, Chong-Chul;Ha, Chung-Woo;Lee, Jai-Ki;Moon, Philip S.;
ABSTRACT
A calculation is presented of air-scattered gamma rays using the modified single-scattering approximation. The air-scattered tissue dose rates are calculated for a general purpose taking into account (a) the buildup and exponential attenuation, (b) the energy spectrum at the position of question and (c) the geometrical scattering volume in three dimensions. These calculations have been further modified to render them applicable to a typical field irradiation facility which is surrounded by a shield wall and in which the source is fitted with a beam collimating device. The results of the calculation include the energy spectra, angular distribution and tissue does rates at source-receiver separation distances of from 35m to 300m. The comparison shows that the present method developed may be generally adequate for the gamma-ray air-scattering problems in field irradiation facilities if energy and angular distribution at the shield are unimportant.
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