1. NAME AND TITLE
ICAR: A Code For Combinatorial Calculation of Level Densities
ENEA, Bologna, Italy, through IAEA, Vienna, through NEA Data Bank, France.
3. CODING LANGUAGE AND COMPUTER
Fortran 77; IBM PC/AT.
4. NATURE OF PROBLEM SOLVED
ICAR performs state and level density calculations for a specified type of nucleon. Calculations
can be carried out in terms of the free gas model or in the frame of the BCS formalism to account for
the pairing interaction.
5. METHOD OF SOLUTION
The code starts by calculating properties of the ground state, such as the correlation function,
chemical potential, total energy and condensation energy. Next all possible configurations of n
excitons within the adopted orbitals are generated by means of a combination enumeration algorithm.
6. RESTRICTIONS OR LIMITATIONS
7. TYPICAL RUNNING TIME
The sample input problem (test case 5) was run at NEA Data Bank on an IBM PC/AT with a math
coprocessor. The problem took about 30 minutes.
8. COMPUTER HARDWARE REQUIREMENTS
ICAR 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 the RM/Fortran compiler, version
2.4 under the MS-DOS 3.20 operating system.
M. Herman, G. Retto, "Chain Of Codes for the Combinatorial Calculation of Level Densities," ISSN/0393-6333; IAEA 0974/01 (July 6, 1988).
M. Herman, "Workshop on Applied Nuclear Theory and Nuclear Model Calculations for Nuclear
Technology Applications," SMR/284-9 (February-March 1988).
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: MICROCOMPUTER; NUCLEAR MODELS