1. NAME AND TITLE
PEQAG-2: A Pre-equilibrium Computer Code With Gamma Emission
Institute of Physics, Bratislava, Czechoslovakia, through IAEA, Vienna, through NEA Data Bank,
3. CODING LANGUAGE AND COMPUTER
Fortran 77; IBM PC/AT.
4. NATURE OF PROBLEM SOLVED
PEQAG-2 performs an exciton model calculation of angle-integrated nucleon and gamma energy
spectra. All the emissions are treated consistently within the pre-equilibrium approach based on the
master equations of the model. Multiple particle and/or multiple gamma emissions are included.
5. METHOD OF SOLUTION
Angle-integrated energy spectra of neutrons, protons and gammas, as well as the corresponding
integrals are computed. No angle-dependent or spin-dependent calculations are included. The state
density used is the equidistant-spacing model in the finite potential well. Inverse cross sections may
be supplied by the program according to the approximation of Chatterjee et al, and the GDR shape is
6. RESTRICTIONS OR LIMITATIONS
Up to four nucleons are emitted and interspersed and/or preceded by arbitrary number of gammas.
The maximum energy is 100 times the energy step used.
7. TYPICAL RUNNING TIME
The sample input problem was run at NEA Data Bank on an IBM PC/AT with a math coprocessor.
The problem took 8 minutes and 50 seconds.
8. COMPUTER HARDWARE REQUIREMENTS
PEQAG-2 runs on an IBM PC/AT with a math coprocessor.
9. COMPUTER SOFTWARE REQUIREMENTS
The code was written in Fortran 77. The NEA Data Bank used Microsoft Fortran version 5.0 and
the RM/Fortran compiler, version 2.42 under the MS-DOS 3.20 operating system.
E. Betak, "PEQAG2: An Updated PC Version of Fully Pre-Equilibrium Computer Code With
Gamma Emission," IAEA1185 (December 13, 1989).
11. CONTENTS OF CODE PACKAGE
Included are the referenced document and one DS/HD (1.2 MB) 5.25-inch diskette.
12. DATE OF ABSTRACT
KEYWORDS: GAMMA RAY SOURCE ANALYSIS; MICROCOMPUTER; NUCLEAR MODELS; NEUTRON; PROTON