NEA-1337 LIMES.

1. NAME OR DESIGNATION OF PROGRAM:  LIMES.

3. DESCRIPTION OF PROGRAM OR FUNCTION

LIMES is a Computer Program for analyses of light and intermediate mass fragment (IMF) emission in heavy ion induced nuclear reactions by an extended sum-rule model [1.2]. Within the frame of the model the integrated cross section for each ejectile and the partial cross section for each entrance channel angular momentum are calculated. The program provides various possibilities like estimating the free parameters of the model by a fit to experimental data or giving prediction on other reactions by using standard parameter sets.

4. METHOD OF SOLUTION

The estimation of the free parameter of the sum-rule model is done via an optimized least-square-fit procedure,  which is included in the source code.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The memory allocation of the program is proportional to the number of calculated channels and angular momenta. The program uses two arrays of size = maximum angular momentum times number of channels.

6. TYPICAL RUNNING TIME

The running time of LIMES depends linearly on the number of channels and angular momenta. By estimating the parameters of the sum-rule model via a fit to experimental data the  model is calculated some 50 times. The contributed example performs  a fit with 98 angular momenta, 95 reaction channels and 20 iterations in 440 seconds on an IBM-AT (See 11).

The sample problems were executed at the NEA-DB on a PC DELL 466/L (processor 80486, 67 MHz). The elapsed time required to execute the program LIMES on the test cases A and B is 4.8 and 3.7 seconds respectively, whereas the elapsed time to execute the program DYNFUS over its test case is 3.6 seconds.

7. UNUSUAL FEATURES OF THE PROGRAM:

8. RELATED AND AUXILIARY PROGRAMS

The fit procedure, which is included in the source code but not printed in the manual can be found in [3]. One of the program inputs, the critical dynamical angular momentum is calculated by the program DYNFUS. DYNFUS described in and contributed with LIMES is an improved version of an original program of Ngo et al.

10. REFERENCES

- I.M. Brancus, H. Rebel, J. Wentz and V. Corcalciuc:
  The Extended Sum-Rule Model View of Light and Indermediate Mass
  Fragment Emission in Nuclear Reactions at Intermediate Energies
  KfK 4646 (Nov. 1989).
- I.M. Brancus, J. Oehlschlaeger and J. Wentz:
  IMFREM - A Computer Program for Analyses of Intermediate Mass-
  Fragment Emission in Heavy Ion Reactions.
  KfK 4454B (Sep. 1988).
- T. Suomijarvi, R. Lucas, C.Ngo, E. Tomasi, D. Dalili and J.
  Matuszek:
  The Role of Dynamics in the Fusion of Two Heavy Nuclei
  Nuov.Cim.82A (1984) 51.

- I.M. Brancus, J. Wentz and H.U. Hohn:
  LIMES - A Computer Program for Analyses of Light and Intermediate
  Mass Fragment Emission in Heavy Ion Reactions by an Extended Sum
  Rule Model
  KfK 4610 B (October 1989).

11. MACHINE REQUIREMENTS

Running LIMES on an IBM-AT or compatible computer requires a minimum of 512 Kbyte main memory and several Mbytes of free disk space. The AT used was running with 6 MHz and a
80287 coprocessor.

The sample problems were run at the NEA/DB on a PC DELL 466/L (processor 80486 , 67 MHz, base memory of 640 Kbyte and extended memory of 15648 Kbyte). The filesize of the executables created using the Lahey linker 386LINK (including stubloader) and included in this package is: LIMES.EXE - 385 Kbyte, DYNFUS.EXE - 242 Kbyte.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

The program is compiled with the "IBM Professional Fortran Compiler V1.00". No special features of this Compiler are used. For reactions where the  product of channel times angular momenta is greater than 16000 a
compiler must support arrays of over 64 Kbytes. On the IBM-AT the program is executed under MS-DOS 3.20.

The programs LIMES and DYNFUS were run under MS-DOS 6.2 on a PC-DELL 466/L (processor 80486, 67 MHz). The corresponding source files were compiled with the FORTRAN 77 Lahey compiler F77L-EM/32, Version 5.20.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

LIMES
uses no special features of the compiler or operating system. Transport to any larger machine should be easy.

15. NAME AND ESTABLISHMENT OF AUTHORS

          I.M. Brancus
          Institute of Atomic Physics
          Bucharest, Romania

          J. Wentz, H.U. Hohn
          Institut fuer Kernphysik III
          Kernforschungszentrum Karlsruhe
          Postfach 3640
          7500 Karlsruhe 1, Germany

File name	File description	Records
NEA1337_01.001	LIMES Information file	247
NEA1337_01.002	Source code file of program LIMES	1621
NEA1337_01.003	Source code file of program DYNFUS	318
NEA1337_01.004	Batch file to create LIMES.EXE & DYNFUS.EXE	39
NEA1337_01.005	Executable of program LIMES	0
NEA1337_01.006	Executable of program DYNFUS	0
NEA1337_01.007	Sample input data for program LIMES	26
NEA1337_01.008	Table of reaction Q-values, input for LIMES	98
NEA1337_01.009	Experimental data file for program LIMES	17
NEA1337_01.010	Console inputs to run test case A	8
NEA1337_01.011	Screen output from test case A	91
NEA1337_01.012	Sample output file from test case A	130
NEA1337_01.013	Console inputs to run test case B	8
NEA1337_01.014	Screen output file from test case B	38
NEA1337_01.015	Sample output file # 1 from test case B	130
NEA1337_01.016	Sample output file # 2 (cross-sections)	9221
NEA1337_01.017	Console inputs to run the DYNFUS test case	5
NEA1337_01.018	Sample output file from the DYNFUS test case	44
NEA1337_01.019	Lahey auxiliary file for error messages	0
NEA1337_01.020	DOS file-names	19