Problem 1640 - non energy conservation in IT mode
Summary: non energy conservation in IT mode
Status: RESOLVED WONTFIX
Alias: None
Product: Geant4
Classification: Unclassified
Component: processes/hadronic/models (show other problems)
Version: 10.0
Hardware: All All
: P5 trivial
Assignee: dennis.herbert.wright
URL:
: 1639 (view as problem list)
Depends on:
Blocks:
 
Reported: 2014-06-19 14:42 CEST by michel.maire
Modified: 2014-11-27 01:32 CET (History)
1 user (show)

See Also:

Attachments
see comment (7.12 KB, image/gif)
2014-06-19 14:49 CEST, michel.maire 		Details
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Description michel.maire 2014-06-19 14:42:21 CEST 

    


    


      



        
          Comment 1
        

        
          michel.maire

        

        
        

        
          2014-06-19 14:49:45 CEST
        

      






Created attachment 274 [details]
see comment

Attached plot is total energy released by deexcitation of Gd158 [80 keV] in IT mode.
In ~80% on cases, there are violation of energy conservation : energy missing.

    


    


      



        
          Comment 2
        

        
          asai

        

        
        

        
          2014-06-28 01:30:17 CEST
        

      






*** Problem 1639 has been marked as a duplicate of this problem. ***

    


    


      



        
          Comment 3
        

        
          dennis.herbert.wright

        

        
        

        
          2014-11-27 01:32:18 CET
        

      






I ran 158Gd[79.513] with IC (internal conversion) turned on.  The IT transitions look like they are conserving energy in the gamma emission case (20% of the time for Gd).  The other 80% of the time the IT proceeds by internal conversion and an electron is emitted.  In this case the atomic electron has to overcome its binding energy when leaving the atom and this is the source of the energy non-conservation you see in your plot.  

The tabulated electron binding energies in this case are 7.24 keV and 50.24 keV, which closely match the energy non-conservation seen in the run.  Presumably, if the atomic relaxation model is turned on, then summing up all the resulting atomic x-rays should make up for most of the binding energy difference, but it seems that the IT and IC codes are working properly and no fix is required.