1. NAME AND TITLE
RDMM: Flux Spectra from In-Pile Fast Neutron Activation Experiment.
Des Communautes Europeennes, Ispra, Italy through the OECD Nuclear Energy
Agency Data Bank, Issy-les-Moulineaux, France.
3. CODING LANGUAGE AND COMPUTER
Fortran, Assembler; IBM 360/65 Series (P00598I036000).
4. NATURE OF PROBLEM SOLVED
Measurements of in-pile fast neutron spectra are often obtained by threshold detector irradiations. The threshold detector technique gives data usually expressed as normalized activation rates. RDMM allows the energy dependent flux determination, on the hypothesis that the neutron flux shape can be expanded in a series of linearly independent functions times a weighting function. Moreover it allows one to estimate the effect of experimental input errors on the solution obtained.
5. METHOD OF SOLUTION
The series expansion coefficients are obtained through the Gauss method by solving a least-squares problem. A procedure based on the Monte Carlo method is used to statistically study the effect of experimental errors.
6. RESTRICTIONS OR LIMITATIONS
7. TYPICAL RUNNING TIME
About 1 minute 30 seconds.
8. COMPUTER HARDWARE REQUIREMENTS
IBM 360 /65.
9. COMPUTER SOFTWARE REQUIREMENTS
IBM 3760/65 Operating System.
a) Included Documentation:
G. Di Cola and A.Rota, “A Code for Fast Neutron Spectra Determination by Activation Analysis,” EUR 2985.e (1966).
11. CONTENTS OF CODE PACKAGE
The package is distributed on a CD with a compressed zip file including source files, documentation, sample input and output.
12. DATE OF ABSTRACT
KEYWORDS: GAUSS FUNCTION, ACTIVATION ANALYSIS, FAST NEUTRONS, LEAST SQUARES FIT, NEUTRON SPECTRA, SERIES EXPANSION