Neutron yield calculation with USRYIELD

[22111140001 (liuyu Cui)]

Versions

Please provide the used software versions.

FLUKA: 4-4.0
Flair:3-3.1

Description

Dear experts:

I tried to count the double differential distribution of neutrons produced by C12 ion bombardment of Be target. The trend of my results is the same as that in the literature. But there is a big deviation in the units. The manual indicates that the default unit of USRYIELD’s output should be GeV-1*sr-1. After I used this unit conversion, the deviation became even bigger. Please tell me where the problem is. Thanks.

Input files

BE.flair (3.9 KB)

BE.inp (2.4 KB)

[ceruttif (Francesco Cerutti)]

The problem is at least twofold:

• first, you selected the wrong quantity in USRYIELD, namely d2sigma/dx1dx2 instead of d2N/dx1dx2, this way introducing an undue multiplication by the beam particle reaction cross section (in HYDROGEN!);
• second, the conversion from (GeV-1 sr-1) to (MeV-1 sr-1) implies to divide (and not multiply!) by 1e3.

[22111140001 (liuyu Cui)]

Thank you for your reply. I have already solved the problem.