So far I have been using RESNUCLEi to score the yields for various cooling times (written in ***_sum.lis and ***tab.lis files). This works fine. However, now I am trying to get the same results in the unit of ‘activity’, i.e, instead of having the number of isotopes, I want their activities (Bq) listed in a data file. I tried various ways (thought EVENDAT would do the job), but no luck so far.
Can someone please tell me what is the right way? A script can be written to calculate the activity for each isotope, but I am sure FLUKA readily does it.
Now, the manual says " 1) WARNING: when the DCYSCORE option is applied to a detector with WHAT(1) > 0.0, all quantities are expressed PER UNIT TIME (in seconds). For instance, the RESNUCLEi estimator will output Bq". However, the summary file (***_sum.lis) clearly mentions the unit, which is not Bq. I am a bit more confused now.
Hi, if you activate the radioactive decay calculation for specific cooling times by RADDECAY (WHAT(1)=1.0) and you link a RESNUCLEi scoring to a cooling time by DCYSCORE (WHAT(1) > 0.0), then what you get are indeed already activities in Bq, as the manual says. Still, in the _sum.lis file you should read:
**** Residual nuclei distribution **** **** (Bq/cmc) ****
which is consistent with the above (and where /cmc holds only if you wanted to put the region volume in the RESNUCLEi card, otherwise you just get the isotope total activity over the scoring region).
Thanks a lot! I checked and found that some of my files were indeed recording in Bq. There were some SDUM and decay timing related mistakes in my input files. Now I am getting the Bq outputs consistently. However, now looks like I can’t have the yields for those cooling times, i.e. the number/ratios of isotopes for each cooling time!
Well, these differ from the respective activity just by the isotope decay constant.
“Well, these differ from the respective activity just by the isotope decay constant. ”
You are right. But the same can be said for the yield to activity conversion. The concern is that one then ends up doing it ‘by hand’