RSICC CODE PACKAGE PSR-532
1. NAME AND TITLE
CEM03.03: Monte-Carlo Code System to Calculate Nuclear Reactions in the Framework of the Improved Cascade-Exciton Model.
2. CONTRIBUTORS
Los Alamos National Laboratory, Los Alamos, New Mexico.
3. CODING LANGUAGE AND COMPUTER
Fortran 77; Sun and PC (P00532MNYCP01).
4. NATURE OF PROBLEM SOLVED
The Fortran 77 code CEM03.03 is an extended and improved version of the earlier codes CEM03.01 and CEM2k+GEM2, which are based in turn on their predecessor codes CEM2k, CEM97, CEM95, CEM92M, CEM92, and MARIAG, which implement versions of the Cascade- Exciton Model (CEM) of nuclear reactions. CEM03.03 calculates total reaction and fission cross-sections, nuclear fissilities, excitation functions, nuclide distributions (yields) of all produced isotopes separately as well as their A- and Z-distributions, energy and angular spectra, double-differential cross-sections, mean multiplicities, i.e. the number of ejectiles per inelastic interaction of the projectile with the target, ejectile yields and their mean energies for n, p, d, t, 3He, 4He, π+, π−, and π0. In addition, CEM03.03 provides in its output separately the yields of Forward (F) and Backward (B) produced isotopes, their mean kinetic energies, A and Z-distributions of the mean emission angle, their parallel velocities, and the F/B ratio of all products in the laboratory system, distributions of the mean angle between two fission fragments, of neutron multiplicity, of the excitation energy, of momentum and angular momentum, and of mass and charge numbers of residual nuclei after the INC and preequilibrium stages of reactions, as well as for fissioning nuclei before and after fission. CEM03.03 calculates reactions induced by nucleons, pions, bremsstrahlung and monochromatic photons on not too light targets at incident energies from ∼10 MeV (∼ 30 MeV, in the case of γ+A) up to several GeV. This Manual describes the basic assumptions of the improved CEM as realized in the code CEM03.03, essential technical details of the code such as the description of the input and output files, and provides the user with necessary information for practical use of and for possible modification of the CEM03.03 output, if required.
5. METHOD OF SOLUTION
Monte-Carlo simulation method.
6. RESTRICTIONS OR LIMITATIONS
None noted.
7. TYPICAL RUNNING TIME
Running times vary considerably. The test cases ran in less than 5 minutes on a Xeon 3.67 GHz computer.
8. COMPUTER HARDWARE REQUIREMENTS
CEM03.03 runs on Sun workstations and PC compatible computers.
9. COMPUTER SOFTWARE REQUIREMENTS
A fortran 77 compatible compiler is required. CEM03.03 has been tested under Unix, Windows, and Linux operating systems. RSICC compiled and ran test cases on an AMD Opteron under RedHat Enterprise Linux with The Portland Group, Inc. pgf90 7.2.2 64-bit compiler and Intel ifort 12.0.2 64-bit compiler. Use of a 64-bit computer and a 64-bit compiler will give the closest reproduction of the test cases included with the distribution.
10. REFERENCES
Stepan Mashnik and Arnold Sierk, “CEM03.03 User Manual,” Los Alamos National Laboratory, Report LA-UR-12-01364 (2012).
11. CONTENTS OF CODE PACKAGE
The package is transmitted on a DVD which includes the report cited above and a GNU compressed tar file which contains the CEM03.03 Fortran source files, data files, and test case input and output.
12. DATE OF ABSTRACT
March 2006, April 2012.
KEYWORDS: NUCLEAR MODELS; MONTE CARLO; EVAPORATION; INC; PREEQUILIBRIUM; FISSION; FERMI BREAK-UP; COALESCENCE