IAEA0974 ICAR.

1. NAME OR DESIGNATION OF PROGRAM:  ICAR.

3. DESCRIPTION OF PROGRAM OR FUNCTION

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. In both cases it is possible to restrict the calculation to orbitals lying below the binding energy, e.g. to calculate bound state densities in the terms of a multistep compound model.

4. METHOD OF SOLUTION

The code starts by calculating properties of the ground state, such as correlation funcion, chemical potential, total energy and condensation energy. Next all possible configurations of n excitons within the adopted orbitals are generated by menas of a combination enumeration algorithm.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:

6. TYPICAL RUNNING TIME

For a 10 MHz IBM-PC compatible desk-top computer, the sample problems run in 12 to 20 minutes.

NEA-DB ran test case 5 of this package on an IBM PC/AT  without math co-processor in 30 minutes.

7. UNUSUAL FEATURES OF THE PROGRAM:

8. RELATED AND AUXILIARY PROGRAMS:

10. REFERENCES:

- M.W. Herman and G. Reffo:
  Combinatorial Approach to Few Quasiparticle State Densities.
  Lecture SMR/284-9, Workshop on Applied Nuclear Theory and
  Nuclear Model Calculations for Nuclear Technology Applications,
  ICTP, Trieste (Italy), (15 February - 18 March 1988)
- M. Herman and G. Reffo:
  Chain of Codes for the Combinatorial Calcuation of Level Densities
  ENEA Report RT/TIB/87/5, ISSN/0393-6333
- G. Reffo and M.W. Herman:
  ICAR - Code for Combinatorial Calculations of Level Densities.
  IAEA-NDS-94  (May 1988)

11. MACHINE REQUIREMENTS

640K main storage of 32-bit IBM-PC or compatible computer.

The test case 5 ran on an IBM PC/AT in 221K of RAM.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  MS-DOS 3.2 with Professional FORTRAN 1.0 compiler.

MS-DOS 3.20 with RM/FORTRAN V2.4 compiler.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

15. NAME AND ESTABLISHMENT OF AUTHORS

                    G. Reffo, M.W. Herman
                    ENEA
                    Bologna, Italy

PC implementation:  V. Goulo
                    Nuclear Data Section
                    International Atomic Energy Agency
                    A-1010 VIENNA, Austria

The PC-version was released for general distribution in the frame
of the Workshop on Applied Nuclear Theory and Nuclear Model
Calculations for Nuclear Technology Applications (15 February -
18 March 1988), organised at the International Centre for
Theoretical Physics, Trieste, Italy by the International Atomic
Energy Agency.

File name	File description	Records
IAEA0974_01.001	Information file	74
IAEA0974_01.002	Original BAT file	3
IAEA0974_01.003	Original executable image	1684
IAEA0974_01.004	FORTRAN source file	2545
IAEA0974_01.005	Input data file	604
IAEA0974_01.006	Input data file	604
IAEA0974_01.007	Input data file	1
IAEA0974_01.008	Printed output data file	651
IAEA0974_01.009	Printed output data file	1285
IAEA0974_01.010	Binary output data file	751
IAEA0974_01.011	DOS file-names	9