Computer Programs
NESC9677 BARMOM.
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NESC9677 BARMOM.

BARMOM, Fission Barriers and Moments of Inertia

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1. NAME OR DESIGNATION OF PROGRAM:  BARMOM.
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2. COMPUTERS
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Program name Package id Status Status date
BARMOM NESC9677/01 Tested 20-JAN-1987

Machines used:

Package ID Orig. computer Test computer
NESC9677/01 Many Computers DEC VAX 11/780
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3. DESCRIPTION OF PROGRAM OR FUNCTION

BARMOM is a collection of three FORTRAN 77 subroutines: BARFIT, MOMFIT, and LPOLY. BARFIT calculates the fission barrier height (in MeV), the rotating ground-state energy (in MeV), and the maximum angular momentum possible in a system of atomic number IZ, atomic mass IA, and angular momentum IL  (in units of h-bar). MOMFIT calculates the three principal axis moments of inertia of the saddle-point shape with IZ, IA and IL. LPOLY calculates Legendre polynomials and is called by BARFIT and MOMFIT.
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4. METHOD OF SOLUTION

The values of all quantities calculated result  from multiparameter fits to calculated properties of fission saddle  points and ground states.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The three sub- routines will give an approximation to the calculated fission barrier height, ground-state energy, Lmax, and saddle-point moments  of inertia for Z between 20 and 100, A between 1.47+0.009Z**2 and 20+3Z, and L between 0 and Lmax, where Lmax is the value of angular  momentum at which the fission barrier vanishes.
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6. TYPICAL RUNNING TIME:
NESC9677/01
The program was only compiled and linked by the NEA-DB  on a VAX-11/780 computer.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS:
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9. STATUS
Package ID Status date Status
NESC9677/01 20-JAN-1987 Tested at NEADB
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10. REFERENCES

- Arnold J. Sierk:
  "Macroscopic Model of Rotating Nuclei"
  LA-UR-85-4007, December 1985
NESC9677/01, included references:
- A.J. Sierk:
  Macroscopic Model of Rotating Nuclei
  Reprint from "Physical Rewiew C",
  Vol. 33, No. 6, pp. 2039-2053  (June 1986)
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11. MACHINE REQUIREMENTS:
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NESC9677/01 FORTRAN-77
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

The subroutines, as distributed, are written for single precision long word-length (60 or 64 bit) computers. Double precision statements for short word-length (32 bit) machines are included as comments.
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15. NAME AND ESTABLISHMENT OF AUTHORS

     A.J. Sierk:
     Los Alamos National Laboratory
     P.O. Box 1663
     Los Alamos, New Mexico 87545, U. S. A.
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16. MATERIAL AVAILABLE
NESC9677/01
File name File description Records
NESC9677_01.001 INFORMATION FILE 38
NESC9677_01.002 SOURCE PROGRAM (FORTRAN-77) 781
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17. CATEGORIES
  • W. Physics

Keywords: angular momentum, fission barrier, ground states, moment of inertia, nuclear structure.