|Message: Re: Problems with Radioactive Decay: no decay lines||Not Logged In (login)|
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On Mon, 16 Jun 2014 15:18:21 GMT, Kseniia Rezynkina wrote:
> Thanks for you response. In fact, that's not exactly what I meant. > > > But with the Radioactive decay gun (defined as in my first post) I do > not get any full-energy alpha peak: > > http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2014/06/05/02.02-8651--06-05_at_11.00.10_AM.png > > For sure, this has to be wrong, so I guess that I'm not implementing > either the gun, or something else related to the radioactive decay > correctly. > > Could you please help me out with this one? >
1- Did you run 1 event with tracking/verbose 2, to be sure that Ra210 decay correctly ? 2- Attached is a macro for TestEm1. Detector is an 'infinite' medium. Total energy deposit is the 'signal'. As it can be seen from alpha spectrum in previous mail, the full decay chain on Ra210 includes several alpha decays. The signal is the sum of these alpha; it is always > 7 MeV. See plot fullDecay.
To 'force' the first decay only, you must activate the command /grdm/nucleusLimits. See plot singleDecay
http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2014/06/17/06.39-84639-Ra210.mac.txt http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2014/06/17/06.39-10923-fullChain.gif http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2014/06/17/06.39-69207-singleDecay.gif