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Co-57 decays to Fe-57 by beta positive emission. The resulting Fe-57 is in its excited state and comes to the ground state by emitting gamma rays.The half life of beta positive decay is 270 days of and that of Gamma emission is 10^-8 s. A sample of Co-57 gives 5×10^9 gamma rays per second. How much time will elapse before the emission rate of Gamma rays drops to 2.5×10^9 per second?

Co-57 decays to Fe-57 by beta positive emission. The resulting Fe-57 is in its excited state and comes to the ground state by emitting gamma rays.The half life of beta positive decay is 270 days of and that of Gamma emission is 10^-8 s. A sample of Co-57 gives 5×10^9 gamma rays per second. How much time will elapse before the emission rate of Gamma rays drops to 2.5×10^9 per second?
 

Grade:12th pass

1 Answers

Rituraj Tiwari
askIITians Faculty 1792 Points
9 months ago
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