| PACKAGE ID: | 001536WKSTN00 EMPIRE-II 2.18 LINUX |
| KWIC TITLE: | Comprehensive Nuclear Model Code, Nucleons, Ions, Induced Cross-Sections |
| AUTHORS: | Nuclear Energy Agency |
| LIMITATION/AUDIENCE CODE: | UNL/UNL |
| COMPLETION DATE: | 09/27/2002 |
| PUBLICATION DATE: | 09/27/2002 |
| DESCRIPTION: | EMPIRE-II is a flexible code for calculation of nuclear reactions in the frame of combined op0tical, Multistep Direct (TUL), Multistep Compound (NVWY) and statistical (Hauser-Feshbach) models. Incident particle can be a nucleon or any nucleus (Heavy Ion). Isomer ratios, residue production cross sections and emission spectra for neutrons, protons, alpha- particles, gamma-rays, and one type of Light Ion can be calculated. The energy range starts just above the resonance region for neutron induced reactions and extends up to several hundreds of MeV for the Heavy Ion induced reactions. |
| PACKAGE CONTENTS: | Media Directory; Software Abstract; Media includes Source Code;/1 CD ROM |
| SOURCE CODE INCLUDED? | Y |
| MEDIA URL: | |
| MEDIA QUANTITY: | 2 |
| METHOD OF SOLUTION: | For projectiles with A,5 EMPIRE calculates fusion cross section using spherical optical model transmission coefficients. In the case of Heavy Ion induced reactions the fusion cross section can be determined using various approaches including simplified coupled channels method (code CCFUS). Preequilibrium emission is treated in terms of quantum-mechanical theories (TUL-MSD and NVWY-MSC). MSC contribution to the gamma emission is taken into account. These calculations are followed by statistical decay with arbitrary number of subsequent particle emmisions. Gamma-ray competition is considered in detail for every decaying compound nucleus. Different options for level densities are available including dynamical approach with collective effects taken in account |
| COMPUTER: | WORKSTATION |
| OPERATING SYSTEMS: | Red Hat LINUX 6.1. |
| PROGRAMMING LANGUAGES: | Fortran 77 |
| SOFTWARE LIMITATIONS: | The code can be easily adjusted to the problem by changing dimensions in the dimensions.h file. The actual limits are set by the available memory. In the current formulation up to 4 ejectiles plus gamma are allowed. This limit can be relaxed by modification of a few lines in the input.f module. Gammas are not allowed in the incident channel. Angular distributions are calculated for the MSD part of the cross section. For the remaining mechanisms isotropy is assumed in the center-of-mass (c.m.) system. MSD can only be calculated for the inelastic scattering (not for the charge exchange reactions). No multiple preequilibrium is included. The preequilibrium emission of clusters is not considered. The running times typically range from a few seconds to a few minutes per incident energy depending upon incident particle energy, mass range of the target, number of compound nuclei included, and the energy bin width that is used. |
| RELATED SOFTWARE: | - EMPEND: Operates on the output of EMPIRE code to produce
- ENDF-VI-formatted cross section records (by A. Trkov).
- X4TOC4: converts retrieved EXFOR entries into computational format (by R. Cullen).
- PLOTC4: plots comparison between calculated and experimental data.
DATA LIBRARY:
- orsi.liv: Nuclear level energies, spins, parities, and gamma-ray branching ratios.
- nix-moller-audi.dat: ground-state masses, deformations and shell corrections
- ldp.dat: level density parameters, neutron resonance spacing (Dobs)
- nparac.dat: level density parameters from the analysis of shell model single-particle spacings |
| UNIQUE FEATURES: | - spin dependent nuclear deformation affecting level densities and GDR shape,
- spin dependent fission barriers,
- cumulative plots of discrete levels,
- automatic retrieval of experimental data from the EXFOR library,
- ENDF-VI formatting,
- plots comparing calculated and experimental (EXFOR) cross sections,
- graphic user interface in Tcl/Tk. |
| REFERENCES: | M. Herman, "EMPIRE-II statistical model code for nuclear reaction calculations" in Proceedings of the "Workshop on Nuclear Reaction Data and Nuclear Reactors: Physics, Design and Safety" 13 March - 14 April 2000, ICTP, Trieste, Italy, to be published.
IAEA1169/04:
M. Herman: EMPIRE-II Statistical Model Code for Nuclear Reaction Calculations (Version 2.18 Mondovi) (27th September 2002) IAEA1169/06:
M. Herman: EMPIRE-II Statistical Model Code for Nuclear Reaction Calculations (Version 2.18 Mondovi) (27th September 2002) |
| ABSTRACT STATUS: | Released As-Is 5/12/2008 |
| KEYWORDS: | DECAY SPECTRA, EMISSION SPECTRA, GAMMA SPECTRA SPECTRA, HAUSER-FESHBACH THEORY, |
| SPONSOR: | NEA |
| RESEARCH ORG: | Nuclear Energy Agency |
| PACKAGE TYPE: | AS-IS |
| PACKAGE STATUS: | RDY |