Date: Tue, 30 Jun 2015 15:36:04 +0000
Hi Alexandre,
looking into your input I didn't see any obvious error.
There is one tiny thing that the 'borsae' RCC is centred around z:11cm while your CYL-VOL
is around z:12cm. But I doubt that this is the problem.
Concerning the EM-CASCADE, I never used it but according to the manual have all the
processes you mentioned on.
Your final normalization A*3600/1e9 it is correct to convert from pSv/Bq to mSv/h
I don't know how MCNP is simulating the cylindrical source nor how it normalizes the results, so I don't have any other idea why you see this difference.
Cheers
Vasilis
________________________________
From: owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it] on behalf of "Alexander Götzelmann (alexander.goetzelmann_at_hs-furtwangen.de)" [alexander.goetzelmann_at_hs-furtwangen.de]
Sent: 29 June 2015 17:05
To: fluka-discuss_at_fluka.org
Subject: [fluka-discuss]: Scoring ambient dose rate; deviation from MCNP-results
Dear FLUKA-users,
I score the ambient dose rate, outside an container with radioactive waste (Co-60 with A = 7,5E10). I simulated this model in MCNP without any energy-cutoffs. The MCNP results should be deemed correct. The FLUKA results are higher by a factor of approximately 3,5. I have no idea, what the source of error for this deviation could be.
Even, when I score ambient dose rate inside the source (Vol-Cyl) I get an even higher deviation.
The results of USRBIN are identical to the results of USRTRACK; thus, there is no error in setting the scoring-cards.
regarding this problem I have two questions:
1) using EM-CASCA as default, are all effects like photoeffect, comptoneffect and pair production activated?
2) does FLUKA simulate a volume source differently than MCNP
The image shows the deviation:
[cid:b335024057e140b394d621b6e0d2d2d5_at_Open-Xchange]
the USRTRACK-results (part.: "DOSE-EQ") are in pSv/Bq. To get mSv/h I calculated the USRTRACK-result * activity of my source *(3600/1E9). This conversion of the values should be correct!?
My input-file is in the attachement
I would appreciate it if somebody can explain the deviation.
thank you,
Alexander
__________________________________________________________________________
You can manage unsubscription from this mailing list at https://www.fluka.org/fluka.php?id=acc_info
(image/png attachment: ATT00001.png)