# CALCULATION OF GROUP CROSS SECTIONS FOR HOT MONOATOMIC MODERATOR WITH VARIABLE FLUX WEIGHTING WITHIN GROUPS, 704 CODE 521/RE 145

## Abstract

This code finds inelastic cross-section matrix elements (transfer matrix) for hot monatomic moderator for multigroup calculations by numeric- analytic double integration of Cohen's formula. Several approximations to the actual neutron density ean be used as weight functions over the velocities of the initial groups. Modified and supplemented results are presented on binary cards and/or tape for direct input into the Argonne Transport Theory Codes or the SNG Code, or for offline output. (auth)

- Authors:

- Publication Date:

- Research Org.:
- Argonne National Lab., Lemont, Ill.

- OSTI Identifier:
- 4252681

- Report Number(s):
- ANL-5984

- NSA Number:
- NSA-13-013690

- DOE Contract Number:
- W-31-109-ENG-38

- Resource Type:
- Technical Report

- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-59

- Country of Publication:
- United States

- Language:
- English

- Subject:
- PHYSICS AND MATHEMATICS; COHEN EQUATION; CROSS SECTIONS; DENSITY; DIFFERENTIAL EQUATIONS; INTEGRALS; MATRICES; MODERATORS; NEUTRONS; NUMERICALS; PROGRAMMING; TRANSPORT THEORY; VARIATIONS; VELOCITY

### Citation Formats

```
Bareiss, E.H., Denes, J.E., and Jankus, V.Z.
```*CALCULATION OF GROUP CROSS SECTIONS FOR HOT MONOATOMIC MODERATOR WITH VARIABLE FLUX WEIGHTING WITHIN GROUPS, 704 CODE 521/RE 145*. United States: N. p., 1959.
Web. doi:10.2172/4252681.

```
Bareiss, E.H., Denes, J.E., & Jankus, V.Z.
```*CALCULATION OF GROUP CROSS SECTIONS FOR HOT MONOATOMIC MODERATOR WITH VARIABLE FLUX WEIGHTING WITHIN GROUPS, 704 CODE 521/RE 145*. United States. doi:10.2172/4252681.

```
Bareiss, E.H., Denes, J.E., and Jankus, V.Z. Fri .
"CALCULATION OF GROUP CROSS SECTIONS FOR HOT MONOATOMIC MODERATOR WITH VARIABLE FLUX WEIGHTING WITHIN GROUPS, 704 CODE 521/RE 145". United States. doi:10.2172/4252681. https://www.osti.gov/servlets/purl/4252681.
```

```
@article{osti_4252681,
```

title = {CALCULATION OF GROUP CROSS SECTIONS FOR HOT MONOATOMIC MODERATOR WITH VARIABLE FLUX WEIGHTING WITHIN GROUPS, 704 CODE 521/RE 145},

author = {Bareiss, E.H. and Denes, J.E. and Jankus, V.Z.},

abstractNote = {This code finds inelastic cross-section matrix elements (transfer matrix) for hot monatomic moderator for multigroup calculations by numeric- analytic double integration of Cohen's formula. Several approximations to the actual neutron density ean be used as weight functions over the velocities of the initial groups. Modified and supplemented results are presented on binary cards and/or tape for direct input into the Argonne Transport Theory Codes or the SNG Code, or for offline output. (auth)},

doi = {10.2172/4252681},

journal = {},

number = ,

volume = ,

place = {United States},

year = {1959},

month = {5}

}

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