question_answer

\[{{A}^{7}}\text{ }Li\] target is bombarded with a proton beam current of \[{{10}^{-4}}\] A for 1 hour to produce \[^{7}Be\] of activity \[1.8\times {{10}^{8}}\] disintegrations per second. Assuming that one \[^{7}Be\] radioactive nucleus is produced by bombarding 1000 protons, determine its half-life (in second)

Answer:

\[\left( 8.63\times {{10}^{6}} \right)\]