Nuclear Chemistry: Kinetics of Radioactive Decay and Radioactive Dating

AI Thread Summary
The discussion focuses on a homework problem involving the exposure of a laboratory rat to alpha radiation with an activity of 11.3 mCi. The activity is calculated to be 4.2X10^8 disintegrations per second and 4.2X10^8 becquerels. The participant is seeking guidance on how to calculate the absorbed dose in grays after converting the radiation activity. They express uncertainty about the methodology for part B of the problem, specifically regarding the calculation of absorbed dose. The conversation emphasizes the need for clarity on the approach to calculating radiation dose metrics.
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Homework Statement


A laboratory rat is exposed to an alpha-radiation source whose activity is 11.3 mCi. What is the activity of the radiation in disintegrations per second? in becquerels? The rat has a mass
of 315 grams and is exposed to the radiation for 12.3 seconds, absorbing 39% of the emitted alpha particles, each having an energy of 9.10X10^-13 Jeules. Calculate the absorbed does in millirads and grays. If the RBE of the radiation is 9.5, calculate the effective absorbed dose in mrem and Sv.
Activity of the radiation in disintegrations per second= 4.2X10^8 dis/s
Activity of the radiation in becquerels= 4.2X10^8 Bq

Homework Equations


ln (Nt/N0)= -kt
k= 0.693/t1/2
E=mc2


The Attempt at a Solution


I started answering the question by converting the given amount of mCi to Ci.
Then converting that amount into dis/s and then into Bq.

After that, I was not exactly sure how to approach part B. A push in the right direction would help
 
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can anyone at least tell me a method or something for how to figure out how to calculate the absorbed dose in grays?
 

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