Asked by Please help!
A typical tumor treated with radiotherapy may receive 400 Gy per 250g.
How many disintegrations of caesium-137 atoms are required to provide that absorbed dose?
Help would be appreciated!
How many disintegrations of caesium-137 atoms are required to provide that absorbed dose?
Help would be appreciated!
Answers
Answered by
Elena
cesium-137: half-life 30.2 years, 0.3 MeV beta and 0.66 MeV gamma-ray emitter
1 Gray (Gy) = 1 joule of ionizing energy per kilogram
Energy = 400 Gy•0.25 kg= 100 J
100J/0.3•10⁶•10⁻¹⁹=3.33•10¹⁵ disintegrations
1 Gray (Gy) = 1 joule of ionizing energy per kilogram
Energy = 400 Gy•0.25 kg= 100 J
100J/0.3•10⁶•10⁻¹⁹=3.33•10¹⁵ disintegrations
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.