NEA-0971: MCRTOF, Mutliple Scattering of Resonance Region Neutron in Time of Flight Experiments

OECD Nuclear Energy Agency / L'Agence pour l'énergie nucléaire

OECD-OCDE

[Program Service | Recent programs]

NEA-0971 MCRTOF. (Abstract last modified 07-NOV-1984)

MCRTOF, Mutliple Scattering of Resonance Region Neutron in Time of Flight Experiments

Abstract Table of Contents:

OPERATING SYSTEM

OTHER RESTRICTIONS

1. NAME OR DESIGNATION OF PROGRAM - MCRTOF.

2. COMPUTER FOR WHICH PROGRAM IS DESIGNED AND OTHER MACHINE VERSION PACKAGES AVAILABLE -

To request or retrieve programs click on the one of the active versions below. A password and special authorization is required.

Explanation of the status codes.

Program-name Package-ID Status MCRTOF NEA-0971/01 Tested

Machines used: Package-ID Orig.Computer Test Computer NEA-0971/01 FACOM M-380 IBM 3081

3. DESCRIPTION OF PROGRAM OR FUNCTION - Multiple scattering of neutrons in the resonance energy region impinging on a disk with an arbitrary angle.

4. METHOD OF SOLUTION - The Monte Carlo method is employed to simulate the path of an incident neutron in a medium for which macroscopic cross sections are determined by resonance parameters. By tracing a large number of neutrons, probabilities for capture, transmission, front-face scattering, rear-face scattering and side-face scattering are determined and printed out as function of incident neutron energy. Optionally, the distribution of capture locations in the disk can be printed. The incident neutron energy is swept to fit a situation as encountered in time-of-flight experiments.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM - The cross section file is constructed from input resonance parameters with a single- level Breit-Wigner formula. The following restrictions and simplifications apply:
- The maximum number of resonances is five.
- Reactions other than capture and scattering are neglected.
- The angular scattering distribution in the center-of-mass system is assumed to be uniform.
- Chemical binding effects are neglected.

6. TYPICAL RUNNING TIME - Depends on resonance parameters and disk thickness. Typical running time for peak shape lookup is about 30 seconds per resonance.
NEA 0971/01: NEA-DB executed the 2 test cases included in the package. Execution times were: 10.24 seconds for test case 1 and 98.18 seconds for test case 2.

7. UNUSUAL FEATURES OF THE PROGRAM -

8. RELATED AND AUXILIARY PROGRAMS -

9. STATUS
NEA-0971/01: 07-NOV-1984 Tested at NEADB

10. REFERENCES  -
NEA-0971/01:
- Makio Ohkubo:
  MCRTOF - A Monte Carlo Program for Multiple Scattering of Neutrons
  in Resonance Energy Region.
  JAERI-M 7988  (November 1978)

11. MACHINE REQUIREMENTS - 236K bytes of main storage on IBM 3081.

12. PROGRAMMING LANGUAGE(S) USED -
NEA-0971/01: FORTRAN-IV

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED - MVS-SP (IBM3081).

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS -

15. NAME AND ESTABLISHMENT OF AUTHORS -
         Mako Ohkubo
         Japan Atomic Energy Research Institute
         Tokai-mura
         Ibaraki-ken
         JAPAN

16. MATERIAL AVAILABLE -
NEA-0971/01:
NEA0971_01.003    MCRTOF INFORMATION FILE                            64 records
NEA0971_01.004    MCRTOF SOURCE (CARD IMAGES)                      1027 records
NEA0971_01.005    JCL                                                46 records
NEA0971_01.006    MCRTOF TEST CASE 1 INPUT DATA                      10 records
NEA0971_01.007    MCRTOF TEST CASE 1 PRINTED OUTPUT                1551 records
NEA0971_01.008    MCRTOF TEST CASE 2 INPUT DATA                      10 records
NEA0971_01.009    MCRTOF TEST CASE 2 PRINTED OUTPUT                 907 records

17. CATEGORIES -

- O. Experimental Data Processing

Keywords: MONTE CARLO METHOD, NEUTRON CROSS SECTIONS, NEUTRON DETECTORS, NEUTRON SPECTRA, RESONANCE SCATTERING, SCATTERING

Home - About Us - Work Areas - Data Bank - Publications - Press Room - List of acronyms - Search