Radioactive half-life of--

Radioactive half-life of...

Cobalt thorium G has a radioactive half-life of 93 years.

Delays can virtually render a radioisotope useless because of its short radioactive half-life.

U-238 has a radioactive half-life of 4.5 billion years. It has metal-like qualities of high density (about twice that of lead) and high rigidity, which make it desirable for use in armour-piercing shells.

“(a) Manage long-half-life radioactive waste so long as there is no other entity authorized to do so;

“(a) Any radioactive source having a half-life greater than five years which enters the country must be returned by its owner to its country of origin or another country that so agrees;