CCC-0042 GAMLEG-JR.(1).

GAMLEG-JR, MultiGroup Gamma Cross-Sections, Energy Absorption Coefficient Generator for Transport Calculation

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROBLEM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: GAMLEG-JR.(1).

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2. COMPUTERS

To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.

Program name	Package id	Status	Status date
GAMLEG-JR	CCC-0042/02	Tested	01-OCT-1978

Machines used:

Package ID	Orig. computer	Test computer
CCC-0042/02	IBM 360 series	IBM 360 series

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3. DESCRIPTION OF PROBLEM OR FUNCTION

GAMLEG-JR generates ANISN-format multi-group photon cross sections and group averated gamma-ray energy absorption coefficients for use in the Sn-type transport calculations.

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4. METHOD OF SOLUTION

GAMLEG-JR is a modification of GAMLEG (2) to produce multi-group photon cross sections for use in the Sn-type transport codes. In the GAMLEG code, the cross section data for the photoelectric effect, pair production and coherent scattering are read in tabular form by cards.
GAMLEG-JR generates these cross section data by simple empirical formula (3) as a function of atomic number Z. The code also produces the group-averaged gamma-ray energy absorption coefficient (KERMA factor) (4). GAMLEG calculated analytically the energy integral of an equation for the average transfer cross section. However, this integration method was found not to be adequate for obtaining the highed Legendre moments than 6th order at low energy region below about0.1 MeV.
GAMLEG-JR calculates this integral by the numerical integration based on Simpson's rule for equally spaced mu.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The present code is written in FORTRAN-IV. The program provides up to 50-energy groups and up to nine Legendre moments for each of unlimited number of elements.

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6. TYPICAL RUNNING TIME

Running time required to generate the cross sections of 20 group structure and nine Legendre moments for a element is about 6 seconds in CPU on the FACOM 230-60/75.

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7. UNUSUAL FEATURES OF THE PROGRAM:

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8. RELATED AND AUXILIARY PROGRAMS

The program will, by input option, punch cards or write a tape for use column entries are in ANISN. For each group, the column entries are sigma(heat), sigma(a), 0.0 , sigma(t), sigma(g to g), sigma(g+1 to g),..... . The heading of each table identifies the element by its atomic number and the Legendre component by Pn, n=0, 1, 2, ... , NMAX-1.

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9. STATUS

Package ID	Status date	Status
CCC-0042/02	01-OCT-1978	Tested at NEADB

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10. REFERENCES

- S. Miyasaka and K. Minami:
  "GAMLEG-JR: A Production Code of Multi-group Cross Sections and
  Energy Absorption Coefficients for Gamma-Ray"
  JAERI-M 6936 (1977).
- K.D. Lathrop:
  "GAMLEG"
  LA-3267 (1965).
- J.H. Hubbell:
  "Photon Cross Section, Attenuation Coefficients, and Energy Ab-
  sorption Coefficients from 10KeV to 100GeV"
  NSRDS-NBS 29 (1969).
- R.T. Berger:
  "The X- or Gamma-Ray Energy Absorption or Transfer Coefficients"
  Radiation Research, 15, 1-29 (1961).

CCC-0042/02, included references:

- Shun-ichi MIYASAKA and Kazuyoshi MINAMI:
GAMLEG-JR, A Production Code of Multi-Group Cross Sections and
Energy Absorption Coefficients for Gamma Rays
JAERI-M 6936, February 1977

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11. MACHINE REQUIREMENTS:

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
CCC-0042/02	FORTRAN-IV

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHOR

J.A.E.R.I.
Tokai-Mura, Naka-Gun
Ibaraki-Ken 319,11 , Japon

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16. MATERIAL AVAILABLE

CCC-0042/02

File name	File description	Records
CCC0042_02.001	SOURCE PROGRAM (F4,EBCDIC)	1009
CCC0042_02.002	SAMPLE PROBLEM INPUT DATA	16
CCC0042_02.003	SAMPLE PROBLEM PRINTED OUTPUT	2302

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17. CATEGORIES

B. Spectrum Calculations, Generation of Group Constants and Cell Problems
J. Gamma Heating and Shield Design

Keywords: SN method, absorption, cross sections, multigroup, photon transport, transport theory.