. "0"^^ . . "0"^^ . . . "114411083"@en-us . . . . "the time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate)"@en-us . "0.849399"^^ . "115275094"^^ . "15275094-n"^^ . "0.0"^^ . . "0.0"^^ . "half life"@en-us . "half-life"@en-us . "0.0227124"^^ . "0.0"^^ . . "0.127889"^^ . "half life"^^ . . "0.0"^^ . "0.0"^^ .