Problem 561

Summary: Neutron spectra has a peak at 100 keV
Product: Geant4 Reporter: nao.yamashita
Component: processes/hadronicAssignee: Hans-Peter.Wellisch
Status: RESOLVED WORKSFORME    
Severity: normal    
Priority: P2    
Version: 5.2   
Hardware: PC   
OS: Linux   
URL: http://www.cosmic.rise.waseda.ac.jp/~naoyuki/G4Report/neutron_spectra_with_peak.pdf

Description nao.yamashita 2003-12-26 02:16:08 CET 
Hello,

When proton beams with energies of 210 MeV are bombarded to various thick
(stopping range) targets made of Fe, Al, Pb, or O, initial energy spectra of
secondary neutrons has a sharp peak at exacly 100 keV.

I used Geant4.5.2.p02 or 4.6.0, G4NDL3.7, PACK2.3, LHEP_PRECO_HP, QGSP_HP or
LHEP_HP.
Any combination ended up in the same results.

I would appreciate any suggestion or help.

Thanks in advance,

Naoyuki Yamashita
nao.yamashita@toki.waseda.jp
Comment 1 Hans-Peter.Wellisch 2004-01-23 10:03:59 CET 
This is a feature of these physics lists (It shoud be 10 keV, though.).
Please use QGSP_BIC (or QGSP_BERT) from the 'High energy physics trackers'
usecase.

Many greetings,

Hans-Peter.