MIXER - is a code to calculate the energy dependent cross section for a composite mixture of up to 10 different materials. The present version will only calculate the cross section for one mixer final reaction (ENDF/B section), e.g. total cross section, but not mixer any other reaction.
Note, this code will not combine all reactions for a mixture of materials during a single run - only one reaction will be created per run.
The first version of MIXER was developed by D.E. Cullen in November 1976, the last one - in January 2007. On our site we present the last version for work on PC under MSDOS (WINDOWS).
A task input file has to be named MIXER.INP, information about process of work this code is registered in report output file MIXER.LST, the ENDF formatted input file is not changed, the resulting linearized cross sections are written in new ENDF formatted file.
The requirements to the task input file are presented in the file MIXER_TAB.doc.
MIXER_TAB.doc
|
Line |
Column
(format) |
Explanation of parameters
|
|
1-2 |
1-66 (16À4,A2) |
TITLE - two line title describing problem (this title is used to identify the output listing and is also written in MF=1, MT=451 (hollerith section) of the ENDF/B formatted output to identify the composite mixture) |
|
3 |
1-60 (À60) |
ENDF/B input data filename (standard option ENDFB.IN) |
|
4 |
1-60 (À60) |
ENDF/B output data filename (standard option ENDFB.OUT ) |
|
5
|
1-11
(²11) |
IZAOUT ZA identification for combination
|
|
12-17
(I6) |
MATOUT
MAT identification for combination
|
|
18-19 (I2) |
MFOUT
MF identification for combination |
|
20-22
(I3) |
MTOUT
MT identification for combination
|
|
6 - N
|
1-11
(²11) |
IZAGET ZA (1000*Z+A) identification of material |
|
12-22
(I11) |
MTGET
MT of reaction
|
|
23-33 (E11.4) |
DENSE
DENSITY of material (grams/cm3) |
|
The 6-th line is repeated for each section (from 2 to 10). Since the ENDF/B formatted output is in barns/atom form a minimum of two sections must be combined (i.e., if only one section is specified the output would be identical to the input and as such the program will consider this to be an error and not perform the calculation).
The list of sections is terminated by a BLANK line.
The list of sections to be combined may be specified in any order, i.e. they need not be in ZA order or the order that the evaluated data appears on the ENDF/B formatted tape.
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You can find DENSITY of materials (grams/cm3) using
Nuclear Wallet Cards or
http://www.chemicalelements.com/
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To facilitate the work with MIXER we present the version of task input file MIXER.INP (several examples of task input file anybody find in the end of file MIXER.DOC).
Create the total cross section (MT=1) for steel (Fe – 78.0%, Cr - 16.0%, Ni - 6.0%)
and identify the combined material with ZA=26800 and MAT=4000. The composition of the
steel will be the data from LIBRARY.DAT and the result will be written in STEEL.DAT.
The input must specify the composition by grams/cm3. This is defined as the product of
the standard density (grams/cm3) times the volume fraction,e.g., for Fe the density is
7.87 grams/cm3,so the input value of 6.1386 is 0.78x7.87.
For this example the following 9 input cards are required.
The asterisks in this example, following below, in input file have to
correspond to the blanks. Here they are presented to facilitate the
calculation of positions.
********10********20********30********40********50********60********70********80
12345678901234567890123456789012345678901234567890123456789012345678901234567890
STAINLESS STEEL. COMPOSITION BY PER-CENT VOLUME IS
78.0-IRON, 16-CHROME, 6-NICKEL
LIBRARY.DAT
STEEL.DAT
******26800**4000*3**1
******26000**********1*****6.1386
******24000**********1*****1.1504
******28000**********1*****0.53412
********************************************************************************
12345678901234567890123456789012345678901234567890123456789012345678901234567890
Running of the code: MIXER.EXE
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