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NEA-1337 LIMES.

LIMES, IMF in Heavy Ion Nuclear Reaction by Sum-Rule Model

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1. NAME OR DESIGNATION OF PROGRAM:  LIMES.
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2. COMPUTERS
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Program name Package id Status Status date
LIMES NEA-1337/01 Tested 29-AUG-1994

Machines used:

Package ID Orig. computer Test computer
NEA-1337/01 IBM PC PC-80486
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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.
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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.
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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.
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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).
NEA-1337/01
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.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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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.
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9. STATUS
Package ID Status date Status
NEA-1337/01 29-AUG-1994 Tested at NEADB
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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.
NEA-1337/01, included references:
- 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).
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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.
NEA-1337/01
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.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-1337/01 FORTRAN-77
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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.
NEA-1337/01
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.
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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.
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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
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16. MATERIAL AVAILABLE
NEA-1337/01
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
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17. CATEGORIES
  • A. Cross Section and Resonance Integral Calculations

Keywords: cross sections, heavy ions, least square fit, nuclear models, nuclear reactions.