meee ~ os ~ ae ne Pe ve Unit of dosé equivalent#:When the =: - appropriate modifying factors are used to calculate dose equivalent one rem is the quantity of any type of ionizing radiation which when absorbed in/man-’produces an*™ effe-t eguivalent to the absorbtion of one rad of X- or gamma-radiation at the place of interest. Roentgen: The quantity of X- or gamma-radiation such that the associated corpuscular emission per 0.001293 grams of air produces, in air ions carrying one electrostatic unit of electricity of either sign. For the purposes here, the roentgen is roughly equivalent.to the. rad. Specific activity: Total radidactivity of a given ‘material (isotope, element, or compound) per gram “of the material -- curies/gram. Abbreviationfor micron,which is onemillionth of a meter. Abbreviation’ for microcurie,which is " one-mil LigRthios.a.eurie, » PE ~phbreviettte toemicrogram; which is one- ape 7 tiie ye + % ye A ea we aeBEF mg, gs millionth of a gram. r