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NESC9677 BARMOM.

BARMOM, Fission Barriers and Moments of Inertia

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES
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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.