[ Identification | Description | Input parameters | Output parameters | Links ]

The Convert_FlatE_2_Maxwell component

Conversion from flat energy distribution to Maxwellian neutron spectra

Identification

Description


The routine modifies/converts the incident flat (in energy) neutron spectra, 
as it comes out from a source like the standard adaptive source 
Source_adapt, 
to obtain a Maxwellian neutron distribution, as it is approximatively the case for thermal neutrons
in a reactor's moderator (e.g. the HFR of the ILL in Grenoble). So, this 
component is only a virtual one, not corresponding to a real element in a
neutron beam.

Input parameters

Parameters in boldface are required; the others are optional.
Name Unit Description Default
T K The temperature of the source, 293 K for thermal neutrons (beam tube H11 at ILL)  
E0 meV Mean energy of neutrons (as for Source_adapt)  
dE meV Energy spread as for Source_adapt (energy range is from E0-dE to E0+dE)  

Output parameters

Name Unit Description Default
Lmin AA Minimum wavelength in energy range  
Lmax AA Maxium wavelength in energy range  
l0 AA Mean wavelength of neutron spectra, about 1.8 AA for thermal neutrons  
L2P AA**4 Normalisation constant for Maxwell distribution  

Links

[ Identification | Description | Input parameters | Output parameters | Links ]

Generated automatically by McDoc, Kristian Nielsen <kristian.nielsen@risoe.dk> / Jan 22 2001