Problem 2434 - production of Pb207 [1634 keV]
Summary: production of Pb207 [1634 keV]
Status: RESOLVED FIXED
Alias: None
Product: Geant4
Classification: Unclassified
Component: processes/hadronic/models/isotope_production (show other problems)
Version: 10.7
Hardware: All All
: P4 minor
Assignee: Vladimir.Ivantchenko
URL:
Depends on:
Blocks:
 
Reported: 2021-10-03 19:43 CEST by michel.maire
Modified: 2022-02-22 09:44 CET (History)
1 user (show)

See Also:

Attachments
macro and printout (261 bytes, text/plain)
2021-10-03 19:43 CEST, michel.maire 		Details
printout of Hadr03 (5.18 KB, text/plain)
2021-10-03 19:47 CEST, michel.maire 		Details
Add an attachment (proposed patch, testcase, etc.)

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Description michel.maire 2021-10-03 19:43:46 CEST 
Created attachment 732 [details]
macro and printout

In attachment, the activation of metastable state Pb207[1633.356 keV] via the reaction Pb208 (n,2n) Pb207m in example Hadr03
  The physics constructor is QGSP_BIC  (see PhysicsList.cc)
  Why there are so many dummy excited states created ?
Comment 1 michel.maire 2021-10-03 19:47:38 CEST 
Created attachment 733 [details]
printout of Hadr03
Comment 2 dennis.herbert.wright 2021-10-26 20:44:24 CEST 
These extra states do not appear in the PhotonEvaporation database or in G4NDL.  Emilio thinks they may be caused by forced energy conservation.  Could they be due to states created in G4Precompound (or BIC since the physics list is QGSP_BIC)?
Comment 3 Vladimir.Ivantchenko 2021-11-19 12:52:05 CET 
Unfortunately, the problem remain in the candidate version of Geant4, so will not be solved in 11.0, patch will be needed.

By the way, in the case of QGSP_BIC there is no final state adjustment, so the situation is still unclear and needs more deep debugging.

Vladimir
Comment 4 Vladimir.Ivantchenko 2022-02-16 12:19:38 CET 
Hello Michel,

the problem is fixed and the fix will be propagated to the patch to 11.0, not sure about 10.7.

Vladimir