X線回折装置の放射線防護

概要

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For the purpose of radiation protectien against X-ray diffraction apparatus, thc followings were carrried out: (i) Measurements of the exposure rates of the primary and scattered X-rays produced from the apparatus, (ii) Determinations of the sensitivity of many types of surveymeters for the low energy X-rays from the apparatus, and (iii) Experiments on the shielding effect of many kinds of materials such as vinyl sheet, rubber, etc..<BR>Exposure rate of about 600R/min was observed for the primary X-rays at the sample holder of the apparatus under the normal operation. For the 8 keV X-rays emitted from the apparatus, the readings of an ionization chamber type surveymeter (ICS-10lC) which was dcsigned for X-rays were in good agreement with those of thc Victoreen r-meter, whereas the readings of the ionization chamber type surveymeter made for γ-rays indicated about one half of those of the Victoreen r-meter. The shielding effects of several materials such as polyethylen, rubber, cotton cloth, etc. were measured. Among them, vinyl sheet had the greatest shielding effect.<BR>Survery technique and assessment of absorbed dose are described in appendix.