**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.

**KEYWORD: ** NUCLEAR MODELS