By Alan D Martin; Samuel A Harbison
An advent to Radiation defense is an available account of the character of the dangers awarded by means of ionizing radiation and the equipment of defense, for these new to the sector and for the non-specialist.
This booklet takes the reader in the course of the basic history to the topic, the technical ideas underlying the keep watch over of radiation risks, the organic results of radiation, and radiation detection and size. those are via a attention of extra really good issues together with radiation safeguard in medication and within the nuclear energy undefined, radioactive waste administration and radiological emergencies
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Extra info for An introduction to radiation protection
8. 7 STOCHASTIC EFFECTS – HEREDITARY The hereditary effects of radiation result from damage to the reproductive cells. This damage takes the form of alterations, known as genetic mutations, in the hereditary material of the cell. It has already been mentioned that reproduction occurs when the ovum is fertilized by a sperm. As a result, the offspring receives a complete set of genetic material from each parent. Thus the child receives two complementary sets of genes, one from each of its parents.
1 TBq cobalt-60 source. 1 TBq ϭ 1011 dis/s, but for 60Co there are two ␥-photons per disintegration. 6 ϫ 1010 g photons /(m2s). 9 RELATIONSHIP OF UNITS The relationship of the units which have now been introduced is illustrated in Fig. 4. The gray describes an absorbed dose in any medium and the sievert expresses biological effect on the human body. In health physics, it is clearly the biological effect of radiation that is of interest and so whenever possible equivalent dose or effective dose should be used.
Radiation weighting factor, wR: measure of the ability of a particular type of radiation to cause biological damage, related to the density of ionization. wR ϭ 1 for ␤, X and ␥, 5 for protons and thermal neutrons, 5–20 for fast neutrons and 20 for ␣ particles. Effective dose: an indicator of the effects of radiation on the body as a whole when different body tissues are exposed to different levels of equivalent dose. Tissue weighting factor, wT: a factor reflecting the radiosensitivity of a particular tissue or organ.