GLOSSARY - TM-11-6665-209-200029

TM 11-6665-209-20

GLOSSARY

The energy (of any radiation) incident upon (or flowing

Intensity -

through) unit area, perpendicular to the radiation beam,

in unit time. As applied to nuclear radiation, the term in-

tensity is sometimes used to express the exposure dose

rate at a given location in roentgens or milliroentgens

per hour.

One-thousandth of a roentgen (abbreviation MR/hr).

Milliroentgens -

The spontaneous emission of radiation, generally alpha

Radioactivity -

or beta radiation, often accompanied by gamma radia-

tion from the nuclei of an unstable element.

The international unit of X-radiation or gamma radiation

Roentgen -

equal to the amount of radiation that produces in one

cubic centimeter of dry air at 0C and standard at-

mospheric pressure ionization of either sign equal to

one electrostatic unit of charge. (Also see milliroen-

tgens).

Any material or obstruction which absorbs radiation and

Shielding -

thus tends to protect personnel (or materials) from the

effects of a nuclear (or atomic) explosion.