RSIC CODE PACKAGE PSR-146

1. NAME AND TITLE 
    ALICE-91: Statistical Model Code System with Fission Competition. 

2. CONTRIBUTORS 
    Lawrence Livermore National Laboratory, Livermore, California. 
    International Atomic Energy Agency, Vienna, Austria, through the Nuclear 
    Energy Agency Data Bank, Issy-les-Moulineaux, France. 

3. CODING LANGUAGE AND COMPUTER 
    Fortran 77; Cray XMP (P00146CYOMP00), IBM PC (P00146PC48600), SUN (P00146SUN0401). 

4. NATURE OF PROBLEM SOLVED 
    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 angular 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. 

5. 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 and also includes gamma-ray 
    competition with particle decay modes. 

    The Sun version was converted from the Cray ALICE-91 that was released in April, 
    1991. This version differs from earlier releases in the following ways: 1) 
    Level density options due to Katoria/Ramamurthg may be selected.; 2) Level 
    density options due to ignatyuk may be selected.; 3) The systematics expressions 
    for precompound angular distributions of C. Kalboch are an option. (These are 
    faster than the option based on n-n scattering kinematics and agree more with 
    experimental results).; 4) Gamma-ray spectra are given for the reactions, and 
    gamma rays compete with nucleon emission (Mitigates problems with trapped 
    protons for very proton rich nuclei.; 5) This version may be used to calculate 
    for isotopically mixed targets (e.g. natural isotopic composition). 

6. RESTRICTIONS OR LIMITATIONS 
    Users must refer to comments in the Fortran source files for input instructions 
    and information. 

7. TYPICAL RUNNING TIME 
    The sample input took about 6 seconds of CPU time on the Cray XMP under UNICOS. 

8. COMPUTER HARDWARE REQUIREMENTS 
    Versions are available for 3 computers: Cray XMP, IBM486, Sun workstations, 
    or PC486 or better computers. 

9. COMPUTER SOFTWARE REQUIREMENTS 
    The Cray/CTSS version used the CIVIC compiler and the Cray/UNICOS version used 
    the CFT77 compiler. The Sun version was tested with the SC1.0 f77 compiler, a 
    Sun SPARCstation SLC under SunOS 4.1.1 using SUN FORTRAN v1.4, and on a Sun 
    SPARCstation 2.0 under SOLARIS 2.3 (Sun 5.3) using SUN FORTRAN 2.0. The 
    executable included with the ALICE-91 PC package was created with the Lahey 
    F77L/EM-32 compiler version 5.20 and will execute in a DOS window of either 
    Windows95 or WindowsNT. 

10. REFERENCES 
    a. Included in the documentation: 
     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 Personal 
     Computer IBM/AT," Informal notes on PC implementation (May 1988). 
     M. Blann, "Recent Progress and Current Status of Preequilibrium Reaction 
     Theories and Computer Code ALICE," UCRL-JC-109052 (Preprint)(November 21, 1991). 
    b. Background information: 
     M. Blann, "Recent Progress and Current Status of Pre-equilibrium Reaction 
     Theories and Computer Code ALICE," in SMR/284-1, ICTP Workshop on Applied 
     Nuclear Theory and Nuclear Model Calculations for Nuclear Technology 
     Applications held in Trieste, Italy (February-March, 1988, and February-March, 
     1992). 
     M. Blann, "Multiple Pre-equilibrium Decay Processes," UCRL-97778, from the 
     NEANDC Specialists' Meeting on Pre-equilibrium Nuclear Reactions held in 
     Semmerling, Austria (February 1988). 
     Jens Bisplinghoff, "Configuration Mixing in Pre-equilibrium 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). 
     M. Blann and T. T. Komoto, "Precompound Evaporation Analyses of Excitation 
     Functions for (alpha,xn) Reactions," Physical Review C, 29(5), 1678-1683 (May 
     1984). 
     G. Reffo, M. Blann, 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, 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). 

11. CONTENTS OF CODE PACKAGE 
    Included are the referenced documents (10.a ) the ALICE-91 source code, sample 
    input and output Each package is available on one DS/HD (1.44 MB) diskette in 
    DOS self-extracting compressed. The SUN version is alternately available on 
    one DS/HD (1.44 MB) diskette in UNIX tar format. The PC version includes an 
    executable. 

12. DATE OF ABSTRACT 
    February 1987, revised July 1989, June 1991, June 1994, October 1994, July 1997. 

KEYWORDS: NUCLEAR MODELS; WORKSTATION; MICROCOMPUTER