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Unit of dose 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
effect equivalent to the absorbtion of
one rad of X- or gamma-radiation at the
place of interest.
Roentgen:
.
The guantity 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 radicactivity of a given material
(isotope, element, or compound) per gram
of the material -- curies/gram.
.
Abbreviation for micron, which is onemillionth of a meter.
Abbreviation for microcurie, which is
one-millionth of a curie.
Abbreviation for microgram, which is onemillionth of a gram.