Problem 824 - radioactive decays in exrdm example
Summary: radioactive decays in exrdm example
Status: RESOLVED INVALID
Alias: None
Product: Examples/Extended
Classification: Unclassified
Component: radioactivedecay/exrdm (show other problems)
Version: 7.1
Hardware: PC Linux
: P2 normal
Assignee: flei
URL:
Depends on:
Blocks:
 
Reported: 2005-12-15 13:57 CET by vgolovko
Modified: 2007-04-08 19:00 CEST (History)
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Description vgolovko 2005-12-15 13:57:52 CET 
Hello,

I have a question about one of the extended example of GEANT4, namely example
called "exrdm" that simulates radioactive decays. In principle, this example was
created to show how to simulate the decays of radioactive isotopes. As a
detector response one of the information extracted is the particle kinetic
energy. Thus, if I would like to get emission spectra of selected radioactive
isotope, I should expect to get as a result a spectrum close to the decay
radiation information available for the selected isotope. In particular, I was
interesting in the emission spectrum for Bi-207. This isotope should have main
monoenergetic electron lines at the energies close to: 482 keV (1.5%), 976 keV
(7%) and 1048 (1.8) keV. In the brackets I indicated intensity from NUDAT2
database. However, as an output of the simulation I have got a spectrum where
the most intense electron lines: 976 and 1048 keV are absent.

Is it a real problem or it is just the lack of information in the decay tables
that have been used by GEANT4 in simulation of the radioactive decays?

Regards,
Victor Golovko.
December 15, 2005
Comment 1 flei 2006-02-19 10:16:59 CET 
Just tried the decay of Bi207 with exrdm. All the expected lines are in the
emitted particle spectrum, including at 976 and 1048 keV, withe the correct
intensity. You probabaly need to see the details in the emission particle ntuple.

Fan