Directory: masses/
File: mass-frdm95.readme (October 5, 2000)
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mass-frdm95.dat
Compilations of ground state properties based on the FRDM model
(provided by S. Goriely on October 5, 2000)
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FRDM PREDICTION OF GROUND-STATES PROPERTIES
P. Moller, J. R. Nix
Los Alamos National Laboratory (USA)
W. D. Myers, W. J. Swiatecki
Lawrence Berkeley Laboratory (USA)
Content
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Predictions of the ground state properties obtained within the Finite
Range Droplet Model (FRDM) [1]. The atomic mass excesses and nuclear
ground-state deformations are tabulated for 8979 nuclei ranging from
O-16 to A=339. Calculations are based on the finite-range droplet
macroscopic model and the folded-Yukawa single-particle microscopic
model. Relative to the 1981 FRDM mass table [2] the current results
are obtained with an improved macroscopic model, an improved pairing
model with a new form for the effective-interaction pairing gap, and
minimization of the ground-state energy with respect to additional
shape degrees of freedom. The values of only nine constants are
determined directly from a least-squares adjustment to the
ground-state masses of 1654 nuclei ranging from O-16 to [Z=106, A=263]
and to 28 fission-barrier heights. The error of the mass model is
0.669 MeV for the entire region of nuclei considered, but is only
0.448 MeV for the region N greater than or equal to 65. The table
includes the experimental masses when available, the calculated
masses, the microscopic correction and deformation parameters. The
microscopic correction Emic corresponds to the difference between the
total binding energy and the spherical macroscopic (droplet) energy.
Format
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Each record of the file contains:
Z : charge number
A : mass number
El : element symbol
fl : flag corresponding to 0 if no experimental data available
1 for a mass excess recommended by
Audi&Wapstra (1995)
2 for a measured mass from
Audi&Wapstra (1995)
Mexp : experimental or recommended atomic mass excess in MeV of
Audi&Wapstra (1995)
Mth : calculated FRDM atomic mass excess in MeV
Emic : calculated FRDM microscopic energy in MeV
beta2: calculated quadrupole deformation of the nuclear ground-state
beta3: calculated octupole deformation of the nuclear ground-state
beta4: calculated hexadecapole deformation of the nuclear ground-state
beta6: calculated hexacontatetrapole deformation of the nuclear
ground-state
The corresponding FORTRAN format is (2i4,1x,a2,1x,i1,3f10.3,4f8.3)
References
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[1] P. Moller, J. R. Nix, W. D. Myers, W. J. Swiatecki (1995) At. Data
and Nucl.Data Tables 59, 185.
[2] P. Moller, J. R. Nix (1981) At. Data and Nucl. Data Tables 26, 165.
[3] G. Audi and A. H. Wapstra (1995) Nucl. Phys. A595, 409.