Directory: gamma/ File: gdr-parameters-theor.readme (March 5, 2001) ****************************************************** gdr-parameters-theor.dat Compilations of Giant Dipole Resonance Energies and Widths (provided by S. Goriely on March 5, 2001) *********************************************************** 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 -------- 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 ------ 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 ---------- [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.