[fluka-discuss]: 10 MeV proton+Si, biasing neutron

From: ±ΟΤΆ½ά <biyuanjie_at_tsinghua.org.cn>
Date: Fri, 27 Sep 2013 15:50:21 +0800 (CST)

Dear fluka users

I have 10 MeV proton+Si target, and a shielding of 50 cm concrete in the front. Since the low neutron yield( About 3.6e-6 particle/sr in the forward), I need to biasing the neutron.
1) I use LAM-BIAS with a factor a 0.005, is that OK?

2) I divide the shield to 5 pieces, and use region biasing for it. But still few neutron at the end of the shielding for 1e9 primary. Should I increse the basing factor?

BIASING 0.0 4. shied1
BIASING 0.0 16. shied2
BIASING 0.0 64. shied3
BIASING 0.0 256. shied4
BIASING 0.0 1024. shied5
LAM-BIAS 0.005 SILICON PROTON INEALL
LAM-BIAS 0.005 SILICON NEUTRON INEALL

Best wishes
Yuanjie
Received on Fri Sep 27 2013 - 11:31:31 CEST

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