Re: [fluka-discuss]: An odd peak at forward direction when calculated the ddx

From: Francesco Cerutti <Francesco.Cerutti_at_cern.ch>
Date: Thu, 30 Jul 2015 09:17:01 +0200

Hallo

this is indeed an artifact due to an anomalous abundance of neutrons with
zero energy in the Center-of-Mass system, the issue is being addressed in
the context of low energy ion event generator development and its fixing
will be reported.

Kind regards

Francesco Cerutti
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CERN-EN/STI
CH-1211 Geneva 23
Switzerland
tel. ++41 22 7678962
fax ++41 22 7668854

On Thu, 30 Jul 2015, s102013803_at_m102.nthu.edu.tw wrote:

> Dear all
>
> I would like to know that the peak at forward direction of the low energy neutron for 135 MeV/A Ne hit on the thin copper target, the result show as figure 1 ( attachment, word file).
>
> I have no idea why it happened at forward direction in this case, the attachment is the input of this case.
>
> Besides, I hold the beam target combination, just change the scoring range, target length and projectile energy for forward direction, the result shown as attachment word file.
>
> From the result, the odd peak appeared at vary small forward angle (theta<0.5 degree).
>
> So, maybe someone can give me some advice to explain the odd peak.
>
> Ps. this is a series cases simulation with beam target combination, and the condition just show in this case, the input and data process have been checked.
>
>
>
> Thanks all, bolun
>

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Received on Thu Jul 30 2015 - 10:42:45 CEST

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