Take the 2-minute tour ×
Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free, no registration required.

Can we calculate the number of photons emitted per second by a radioactive source (gamma) ? we can take 100g of barium-133 as an example

share|improve this question
yes it only depends on the amount of radioactive material present and the decay constant (decays per second) –  Martin Beckett Jan 25 '13 at 18:36
...to within statistics, of course. –  dmckee Jan 25 '13 at 18:43

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.