Please fill out the following information to help in answering your question, and also see tips for posting code snippets. If you don’t provide this information it will take more time to help with your problem!
_Geant4 Version:11.2.1
_Operating System:ubuntu
_Compiler/Version:12
_CMake Version:3.16
Hello, please, I would like to know how to evaluate the gamma rays emitted only by bismuth-214 in the radioactive decay chain of radon. I wanted to use GetParentDefinition() of the track, but it doesn’t exist anymore? And how can I improve my spectrum by increasing the number of channels… Thank you, best regards.
With rdecay01 we can notice that 99,97% of the decay chain of Rn222 transit via Pb214 ground state.
Therefore, for Bi214 deexcitation, it is quasi equivalent to start from Pb214 and to use nucleusLimits as in the attached macro here.
raoul.mac.txt (460 Bytes)
raoul.out.txt (2.7 KB)
1 Like
Thanks si much Sir … I will start with the decay of pb 214 to follow bismuth 214.
However, the 609 keV peak from Bi-214 is not visible in your spectrum. What might be causing this, and how can it be resolved?
@maire1 's macro limits the decay to A=214, Z=82 which is 214Pb. The daughter is 214Bi and those are its lines. The 609 keV line you are mentioning is from the beta decay of 214Bi to 214Po. The 609 keV line is a state of 214Po, not 214Bi. In this circumstance you can just increase the Z range to get it “back” (by allowing Bismuth to decay as well)
/process/had/rdm/nucleusLimits 214 214 82 83
The 609 keV peak comes from Polonium-214 excited state, not from Bismuth-214.
It is not included in the previous plot.
To see it, play with the command nucleusLimits
see @jrellin answer, which is more explicite.
