1. NAME AND TITLE

HAUSER*5: Code System for Calculating Nuclear Cross Sections.

AUXILIARY ROUTINE

TISO: Gamma Ray Transmission Coefficient Calculator.

2. CONTRIBUTOR

Hanford Engineering Development Laboratory, Richland, Washington.

3. CODING LANGUAGE AND COMPUTER

Fortran IV; UNIVAC.

4. NATURE OF PROBLEM SOLVED

HAUSER*5 is a derivation of HAUSER*1-*3, code systems originally developed to predict important cross sections in nuclear astrophysics and heavy ion physics. HEDL added fission capabilities, producing HAUSER*4. HAUSER*5 provides extensions in two areas: the applicability of the code is extended to higher bombarding energies by inclusion of pre-equilibrium and direct reactions, and the ability is included to calculate the angular distribution of the first emitted particle in the case of reactions modeled with the Hauser-Feshbach model.

HAUSER*5 was designed to calculate nuclear cross sections using the Hauser-Feshbach equation with width fluctuation corrections. It can accurately and quickly calculate two- and three-body reactions involving neutrons, charged particles, capture, and fission. It can accurately predict nuclear cross sections over most energy ranges less than approximately 60 MeV.

5. METHOD OF SOLUTION

HAUSER*5 uses the statistical (Hauser-Feshbach) model, the pre-equilibrium model, and a statistical model of direct reactions to predict nuclear cross sections. It is unrestricted as to particle type, includes fission and capture, makes width-fluctuation corrections, and performs three-body calculations--all in minimum computer time. Transmission coefficients can be generated internally or supplied externally.

6. RESTRICTIONS OR LIMITATIONS

TISO calculates gamma-ray transmission coefficients for the separate population of two levels, one of which is usually the ground state. The gamma-ray transmission coefficients produced by TISO can be directly entered into the HAUSER set of programs. The major limitation is that fission transmission coefficients cannot be entered when two sets of gamma-ray transmission coefficients are used.

7. TYPICAL RUNNING TIME

No study has been made by RSIC of typical running time for HAUSER*5.

8. COMPUTER HARDWARE REQUIREMENTS

HAUSER*5 was designed for the UNIVAC computer.

9. COMPUTER SOFTWARE REQUIREMENTS

A Fortran IV compiler is required.

10. REFERENCE

F. M. Mann, "HAUSER*5, A Computer Code to Calculate Nuclear Cross Sections," HEDL-TME 78-83 (July 1979).

11. CONTENTS OF CODE PACKAGE

Included are the referenced document and one (1.2MB) DOS diskette which contains the source code and sample problem input and output.

12. DATE OF ABSTRACT

February 1983; August 1984.