Problem 2081 - neutronHP ignores metastable states
Summary: neutronHP ignores metastable states
Status: RESOLVED WONTFIX
Alias: None
Product: Geant4
Classification: Unclassified
Component: processes/hadronic/models (show other problems)
Version: 10.4
Hardware: All All
: P4 minor
Assignee: dennis.herbert.wright
URL:
: 2078 (view as problem list)
Depends on:
Blocks:
 
Reported: 2018-08-28 10:05 CEST by michel.maire
Modified: 2018-11-20 01:40 CET (History)
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Description michel.maire 2018-08-28 10:05:43 CEST 
See bugzilla 2078, which is not the same as 2079 !
Comment 1 Gabriele Cosmo 2018-08-29 09:14:50 CEST 
*** Problem 2078 has been marked as a duplicate of this problem. ***
Comment 2 dennis.herbert.wright 2018-11-20 01:40:01 CET 
Hi Michel,

  There is no ParticleHP process which can produce very long-lived meta-stable states.  According to Tatsumi there are a few such nuclides, including Ag[110m2], which live so long that they are not included in ENDF or similar databases.  I checked for myself and indeed there are no such data in ENDF, and therefore in G4NDL, for the formation of this state.
  Obviously you have cross section data for thermal capture, but it is not easy to add the data to G4NDL, and maybe it would not even be appropriate since the lifetime of this state is longer than the ground states of many nuclei.
  Once Ag[110m2] is produced, the radioactive decay model can de-excite it, but currently a special Geant4 model would have to be developed in order to produce it. 

Dennis