One rad is
a. the amount of radiation that deposits 10?2 J of energy into 1 kg of absorbing material.
b. the amount of ionizing radiation that will produce 1/3 × 10^?9 C of electric charge in 1 cm3 of air under standard conditions.
c. the amount of radiation needed for ionization of an atom.
d. the amount of radiation needed for dissociation of a molecule.
e. the amount of radiation that deposits one erg of energy in 1g of material.
a
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