Dear FLUKA experts,
I have created a Iodine-131 point source 0.5 m away from a NaI detector. I need to find the dose rate by Gamma emmision at NaI detector after certain time intervals. (1h and 24h ) I used DETECT card and got count vs Energy plots. Then I tried USRBIN, AUXSCORE and DCYSCORE. I got 0.000E0 values when I used RADDECAY in semianalogous mode. But with activation study mode and IRRADIATION card
I131Activity.flair (3.9 KB)
I131Activity.inp (4.5 KB)
Im getting some values at the output file I created with OPEN card. I would like to know whether Im on the right path with correct cards. INP file and FLAIR file attached.
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Hello! Welcome and many thanks for posting your question on the forum. I will start to have a look at it as soon as possible. Please, stay tuned.
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Hello! I had the chance to check your files. I suggest a gradual approach. Please find below some resources to help you address your problem gradually.
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Approach to activation modes:
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Other topics on the forum
- Other useful post: link
- This discussion - which includes also the mentioning of TIME-CUT card
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Scoring:
- DCYSCORE settings: the already mentioned activation lecture; in case of semi-analogue mode, DCYSCORE set to -1 is needed
- Post involving DETECT card, if needed
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General comments:
- I would place a simple USRBIN scoring mesh, even in AIR, and test the RADDECAY options/radioactive source simulations
- Then, I suggest to increase the detail of the simulation bringing back the detector. What to score, then, will depend on your specific needs (is a USRBIN sufficient, or you want to collect info about the detector response).
- I should also suggest to run with a sufficient number of cycles (“Recommendations”, page 29 of this lecture)
I hope to have provided you with sufficient resources to guide your solution. I will be away for work in the next to weeks, so further answers might be delayed.
Good luck with your simulation.
Best regards,
Tommaso
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thank you Im getting results (dose rates) closer to the theoretical results I have.