| Summary: | gamma deexcitation | ||
|---|---|---|---|
| Product: | Geant4 | Reporter: | michel.maire |
| Component: | processes/hadronic/models | Assignee: | dennis.herbert.wright |
| Status: | RESOLVED FIXED | ||
| Severity: | major | ||
| Priority: | P5 | ||
| Version: | 10.1 | ||
| Hardware: | All | ||
| OS: | All | ||
| Attachments: |
gamma spectrum
gamma spectrum decay macro of Nb93m for rdecay01 Nb93 gamma spectrum with correct lines Nb93 electron spectrum with correct lines Nb93 gamma spectrum with wrong lines (v10.1) Nb93 electron spectrum with wrong lines (v10.1) |
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Created attachment 301 [details]
gamma spectrum
Created attachment 312 [details]
decay macro of Nb93m for rdecay01
Comment on attachment 312 [details]
decay macro of Nb93m for rdecay01
Hello,
In my case, with rdecay01 example , I tried to decay Nb93 first metastable
state (IT, 16.1 year, 30.77 keV)
The bug appears with 10.1 version.
This isotope has a highly converted gamma ray
In previous versions (<10.1) , gamma spectrum is ok with XK characteritics
lines and the very low intensity for gamma at 30.77 keV
With version 10.1 I have also dummy rays in spectrums like Michel ( see gamma
and electron plots and compare to nudat intensities)
With another isotope, Sn117m (14 days, 314.58 keV, IT decay), the intermediate
level (158.56, 0.27 ns ) is not explicitly created as seen by Michel.
I also attach the simple macro derived from example rdecay01
Gilles
Created attachment 313 [details]
Nb93 gamma spectrum with correct lines
Created attachment 314 [details]
Nb93 electron spectrum with correct lines
Created attachment 315 [details]
Nb93 gamma spectrum with wrong lines (v10.1)
Created attachment 316 [details]
Nb93 electron spectrum with wrong lines (v10.1)
With tags hadr-deex-V10-01-03 and radioactive_decay-V10-01-09, these problems now seem to be fixed. According to my tests, in the decay of Xe131[341.140], the 163.926 level is now produced. The half-life of the decay is now 1.6 ns as in the RDM database. Also Nb93[30.77] seems to decay properly, with 27587 e- and 1359 gammas for 10000 decays of Nb93. And Sn117[314.58] decay now produces the Sn117[158.559] state. The half-life is seen to be 14.2 days, as expected. Please try these tags, and if they work for you, I'll close this report. |
Created attachment 300 [details] gamma spectrum HI Dennis, I choose this example, as it illustrates well the problems we encounter in 10.1 release : deexcitation Xe131[341.140] ---> Xe131[163.926] ---> Xe131 1- level 163.926 keV is not explicitly created 2- time life of chain is 1.6 ns instead of 12 days 3- gamma spectrum (and e- spectrum as well) includes dummy rays. See attached plots