PSR-0146: ALICE91, Particle Spectra from Compound Nucleus Decay

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PSR-0146 ALICE91. (Abstract last modified 24-JAN-1996)

ALICE91, Particle Spectra from Compound Nucleus Decay

Abstract Table of Contents:

1. NAME OR DESIGNATION OF PROGRAM - ALICE91.

2. COMPUTER FOR WHICH PROGRAM IS DESIGNED AND OTHER MACHINE VERSION PACKAGES AVAILABLE -

To request or retrieve programs click on the one of the active versions below. A password and special authorization is required.

Explanation of the status codes.

Program-name Package-ID Status ALICE91 PSR-0146/01 Tested ALICE91 PSR-0146/02 Tested

Machines used: Package-ID Orig.Computer Test Computer PSR-0146/01 CRAY X-MP Many Computers PSR-0146/02 IBM PC PC Pentium 75

3. DESCRIPTION OF PROGRAM OR FUNCTION - Several types of calculations and combinations can be performed including a standard Weisskopf- Ewing evaporation with multiple particle emission, S-wave approximation to give an upper limit to the enhancement of gamma-ray deexcitation due to momentum effects, and an evaporation calculation that can include fission competition via the Bohr-Wheeler approach. ALICE91 calculates precompound decay via Hybrid and GDH models with multiple precompound decay algorithms, single and double differential spectra, and reaction product cross sections.

4. METHOD OF SOLUTION - ALICE/85/300 and later revisions of the ALICE/LIVERMORE 82 computer code do precompound, compound/ statistical fission calculations in the general framework of the Weisskopf-Ewing evaporation model, the Bohr-Wheeler transition state model for fission, and the hybrid/geometry dependent models for precompound decay. ALICE/85/300 allows a variable energy mesh size, excitation energies up to 300 MeV, and incorporates several other improvements in calculational approaches.
ALICE91 includes options for shell dependent level densities, and an option to use systematics for angular distribution. The new version also includes gamma-ray competition with particle decay models.
The IBM PC version (B) was converted from mainframe ALICE-87, which is a revision of ALICE/85/300. Input default options were included in this version. Refer to comments in the file ALICE1.FOR for information on modifications. ALISO differs only in that it will do calculations for natural isotopic targets, giving weighted results at the end.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM - Users must refer to comments in the FORTRAN source files for input instructions and information. If running the PC version on 32-bit word-length machines, remove CXXXXX from double precision statements for POW and GAM.

6. TYPICAL RUNNING TIME - The sample input took about 6 seconds of CPU time on the Cray XMP under UNICOS. The sample case for ALICE-87 took 23 minutes on an IBM PC/XT running at 4.7 megahertz with a math co- processor. The ALISO case took 4 minutes on the same computer.

PSR-0146/01:

TYPICAL RUNNING TIME - The test case included in this package was run at NEADB both on IBM 3090 and VAX 8810 computers. Execution times were 20 seconds on IBM and 59 seconds on VAX.

7. UNUSUAL FEATURES OF THE PROGRAM -

8. RELATED AND AUXILIARY PROGRAMS -

9. STATUS
PSR-0146/01: 09-DEC-1991 Tested at NEADB
PSR-0146/02: 24-JAN-1996 Tested at NEADB

10. REFERENCES  -
- M. Blann,
  "Recent Progress and Current Status of Preequilibrium Reaction
Theories and Computer Code ALICE" in SMR/284-1, ITCP Workshop on applied Nuclear Theory and Nuclear Model Calculations for Nuclear Technology Applications held in Trieste,
  Italy (February-March, 1988).
- M. Blann,
  " Multiple Preequilibrium Decay Processes"
UCRL-97778, from the NEANDC Specialists' Meeting on Preequilibrium Nuclear Reactions hels in Semmerling,
  Austria (February 1988).
- Jens Bisplinghoff,
"Configuration Mixing in Preequilibrium Reactions: A New Look at the Hybrid-Exciton Controversy"
  Physical Review C, 33(5), 1569-1580 (May 1986).
- M. Blann and J. Bisplinghoff,
  "Numerical Test of Approximations in the Hybrid Precompound Decay Model"
  Atomic Nuclei, 326, 429-434 (1987).
- G. Reffo, M. Blann and B.A. Remington,
  "On the Origin of Medium Energy Gamma-Rays in Nuclear Reactions"
  UCRL-97866, Preprint submitted to Physical Review C (December 1987).
- M. Blann, W. Scobel and E. Plechaty,
  "Precompound Nucleon Angular Distributions in the Continuum"
  Physical Review C, 30(5), 1493-1508 (November 1984).
- M. Blann, G. Reffo and F. Fabbri,
  "Calculation of Gamma-Ray Cascades in Code ALICE"
UCRL-55374, Preprint submitted to Nuclear Instruments and Methods (September 1986).
- F. Plasil,
  "ORNL ALICE: A Statistical Model Computer Code Including Fission Competition"
  ORNL/TM-6054 (November 1977).
PSR-0146/01:
- M. Blann:
  CODE ALICE/85/300
  UCID-20169 (September 1984).
- M. Blann and J. Bisplinghoff:
  CODE ALICE/LIVERMORE 82
  UCID-19614 (November 1982).
- R. Roussin:
  Informal Input Instructions for ALICE/85/300 (February 1987).
- M. Blann and H.K. Vonach:
  Global Test of Modified Precompound Decay Models
  Physical Review C,28(4) 1475-1492 (October 1983).
- D.E. Cullen and V. Goulo:
  Precompound Nuclear Model Code Version for Personnal Computer
  IBM/AT
  Informal Notes on PC Implementat. (May 1988).
- M.Blann :
  Recent Progress and Curent Status of Preequilibrium Reaction
  Theories and Computer Codes Alice
  UCRL-JC-109052 Preprint November 21, 1991
PSR-0146/02:
- M. Blann:
  CODE ALICE/85/300
  UCID-20169 (September 1984).
- M. Blann and J. Bisplinghoff:
  CODE ALICE/LIVERMORE 82
  UCID-19614 (November 1982).
- R. Roussin:
  Informal Input Instructions for ALICE/85/300 (February 1987).
- M. Blann and H.K. Vonach:
  Global Test of Modified Precompound Decay Models
  Physical Review C,28(4) 1475-1492 (October 1983).
- D.E. Cullen and V. Goulo:
  Precompound Nuclear Model Code Version for Personnal Computer
  IBM/AT
  Informal Notes on PC Implementat. (May 1988).
  M. Blann :
  Recent Progress and Curent Status of Preequilibrium Reaction
  Theories and Computer Codes Alice
  UCRL-JC-109052 Preprint November 21, 1991

11. MACHINE REQUIREMENTS - Version A is operational on the Cray XMP, and Version B has run on both IBM PC/XT and /AT computers with math co- processors. Memory requirements for the executable modules on an IBM PC/AT are: 530K (ALICE) and 525K (ALISO).

PSR-0146/02:

HARDWARE REQUIREMENTS - NEA-DB installed the program on a Brett Pentium 75 PC with 75MHZ and 16MB of RAM and ran the test case included in the package.

12. PROGRAMMING LANGUAGE(S) USED -
PSR-0146/01: FORTRAN-77
PSR-0146/02: FORTRAN-77

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED - The CRAY/CTSS version used the CIVIC compiler and the CRAY/UNICOS version used the CFT77 compiler. For ALICE-87 IBM Professional FORTRAN Version 1.0 was used, and for ALISO, Microsoft's FORTRAN 4.01 was used.

PSR-0146/01:

SOFTWARE REQUIREMENTS - VMS V5.3 (VAX); MVS/XA (IBM).

PSR-0146/02:

SOFTWARE REQUIREMENTS - NEA-DB installed the program and ran the test case under MS-DOS 6.2. The source code was compiled with the Lahey FORTRAN compiler version 5.20.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS -

15. NAME AND ESTABLISHMENT OF AUTHORS -
           Lawrence Livermore National Laboratory
           Livermore, California
           International Atomic Energy Agency
           Vienna, Austria

17. CATEGORIES -

- A. Cross Section and Resonance Integral Calculations

Keywords: COMPOUND NUCLEI, EVAPORATION MODEL, NUCLEAR MODELS, PRECOMPOUND-NUCLEUS EMISSION