|
|
|
Thermal
scattering and P1 matrixes |
|
With
the exception of main moderator elements for all the materials included
in the WIMS-D library the free gas model was used for calculating the
thermal scattering matrix. For moderators the models listed below were
applied:
|
Material |
WIMS
ID |
Scattering
law |
MAT |
1-H
H2O |
3001 |
Hydrogen
bound in water |
1 |
1-H
ZrH |
5001 |
Hydrogen
bound in ZrH |
7 |
1-D
D2O |
3002 |
Deuterium
bound in water |
11 |
4-Be-nat |
9 |
Berillium |
26 |
6-C
nat |
2012 |
Carbon |
31 |
8-O
nat |
6016 |
Free
gas |
0 |
|
On
the other hand, the transport cross section correction was applied to
all materials, with the exception of 4 moderator listed below for which
the P1 matrix is available:
|
P1
Matrices |
|
|
WIMS
ID
|
T
[K]
|
Description
|
Data
Source
|
|
|
3001
|
296
|
Hydrogen
bound in water.
PWR
spectrum
|
ENDF/B-VI.8
|
2
|
1-D
D2O
|
3002
|
296
|
Deuterium
bound in D2O.
HWR
spectrum
|
ENDF/B-VI.8
|
3
|
6-C
nat
|
2012
|
296
|
Graphite.
PWR
spectrum
|
ENDF/B-VI.8
|
4
|
8-O
nat
|
6016
|
293
|
Oxygen.
PWR
spectrum
|
ENDF/B-VI.8
|
|
|
|
|