Personnel Exposures Associated with the Therapeutic Use of Radium, Radon and Cobalt-60

Abstract
BEFORE the protection problems of personnel exposed to radium, radon and cobalt-60 are considered it seems advisable to review some of the terminology that is generally used in conjunction with radioactive materials.The term radioisotope is applied to a material that has exactly the same chemical properties as a non-radioactive substance, the difference being that the radioisotope has different physical properties in that it emits radiation, which may be in the form of either particles or rays or both, depending on the specific isotope involved. The unit of dose for a radioisotope is the millicurie, which is an accepted rate . . .

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