Directory: gamma/
File: gdr-parameters-theor.readme (March 5, 2001)
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gdr-parameters-theor.dat
Compilations of Giant Dipole Resonance Energies and Widths
(provided by S. Goriely on March 5, 2001)
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ETFSI PREDICTION OF GROUND-STATES PROPERTIES
S. Goriely
Universite Libre de Bruxelles (Belgium)
M. Pearson
Universite de Montreal, Quebec (Canada)
F. Tondeur
Institut Superieur Industriel de Bruxelles (Belgium)
Content
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Predictions of the Giant Dipole Resonance (GDR) energies and widths
for about 6000 nuclei with 14<=Z<=110 lying between the proton and the
neutron driplines. The GDR is represented in the Goldhaber-Teller
model [1] where the neutron and proton densities perform an
out-of-phase vibration around their centre of mass. The dynamics of
the oscillation is assumed to be dominated by the np-interaction
[2]. The present table gives the GDR energies predicted by [2] with a
renormalized np-interaction of strength derived from a least-square
fit to the experimental GDR energies [3]. The nucleon density
distribution and ground-state deformation are taken from the Extended
Thomas-Fermi plus Strutinsky Integral (ETFSI) compilation [4,5]. The
expression for the shell-dependent GDR width is taken from [6] using
the newly-determined GDR energies and the ETFSI shell
corrections. Such predictions include the shell-dependent GDR
broadening due to the coupling between the dipole oscillations and the
quadrupole surface vibrations. Comparison between predicted and
experimental GDR energies and widths can be found in [3]. In case of
deformed nuclei, the GDR splits into two peaks for oscillations
parallel to the axis of rotational symmetry and perpendicular to it.
Format
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Each record of the file contains:
Z : charge number
A : mass number
El : element symbol
Eta: deformation parameter (diameter along the nuclear symmetry axis /
diameter along an axis perpendicular to it) predicted by ETFSI-2
E1 : GDR energy for oscillation parallel to the axis of rotational
symmetry, in MeV
W1 : GDR width for oscillation parallel to the axis of rotational symmetry,
in MeV
E2 : GDR energy for oscillations perpendicular to the axis of rotational
symmetry, in MeV
W2 : GDR width for oscillations perpendicular to the axis of rotational
symmetry, in MeV
The corresponding FORTRAN format is (2i4,1x,a2,f7.3,4f7.2)
References
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[1] M. Goldhaber, E. Teller (1948), Phys. Rev. 74, 1046.
[2] P. Van Isacker et al. (1992), Phys. Rev. C45, R13.
[3] S. Goriely (1998), Phys. Lett. B436, 10.
[4] S. Goriely (2000), in Proc. of the 10th International Symposium on Capture
Gamma-Ray Spectroscopy and Related Topics, (AIP Conf. Proc. 529, Ed. S.
Wender), p.28.7
[5] Y. Aboussir, J. M. Pearson, A. K. Dutta and F.Tondeur (1995) At. Data and
Nucl. Data Tables 61, 127.
[6] F. K. Thielemann, M. Arnould (1983), in Proc. of the Conf. on Nuclear Data
for Science and Technolog, (eds. K. Bockhoff, Reidel, Dordrecht), p.762.