Problem 583

Summary: absence of neutron thermalization
Product: Geant4 Reporter: machulin
Component: processes/hadronic/modelsAssignee: tkoi
Status: RESOLVED FIXED    
Severity: normal    
Priority: P2    
Version: other   
Hardware: PC   
OS: Linux   

Description machulin 2004-02-17 06:20:55 CET 
The effect of neutron thermalization on medium molecules in
hydrogen content mediums (like water, organic scintillators (HnCm)) is not
taken into account now in geant4 packet.
	For reactor and solar neutrino experiments (like Borexino, Chooz
,Kamland etc.) with big hydrogen-content scintillators the neutron
thermalization is necessary to include to obtain the correct value of
neutron detection efficiency.
	So, the proposal is to add the neutron thermalization process
into geant4 hadron part.
	I think, such addition will be also usefull for dosimetry, medical
and reactor geant4 applications.

Igor Machulin.
Comment 1 Hans-Peter.Wellisch 2004-02-17 06:28:59 CET 
Thank you for reporting this one.

Many greetings,

Hans-Peter.
Comment 2 Hans-Peter.Wellisch 2004-03-04 07:33:59 CET 
This is not small. I'll move this one to the requirements data-base.

Many greetings,

Hans-Peter.
Comment 3 tkoi 2006-07-24 11:28:59 CEST 
Themal neutron scatter from nuclei with chemically bonded atoms will be include
to Geant4, which based on thermal neutron scattering files from the evaluated
nuclear data files ENDF/B-VI, Release2

Tatsumi
Comment 4 tkoi 2007-01-24 07:54:59 CET 
Themal neutron scatter from nuclei with chemically bonded atoms is included
v8.2.