Bochum 2009 – scientific programme

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HK: Fachverband Hadronen und Kerne

HK 16: Nuclear Structure and Dynamics II

HK 16.5: Talk

Monday, March 16, 2009, 17:45–18:00, H-ZO 60

Masses and fission barriers of nuclei in the LSD model — •Krzysztof Pomorski — MCS University

Recently developed Lublin-Strasbourg Drop (LSD) [K. Pomorski, J. Dudek, PRC 67, 044316 (2003)] model together with the microscopic corrections taken from Ref. [P. Moeller et al., ADNDT 59, 185 (1995)] is very successful in describing many features of nuclei. In addition to the classical liquid drop model the LSD contains the curvature term proportional to the A^1/3. The r.m.s. deviation of the LSD binding energies of 2766 isotopes with Z,N > 7 from the experimental ones is 0.698 MeV only. It turns out that the LSD model gives also a satisfactory prediction of the fission barrier heights. In addition, it was found in Ref. [K. Pomorski, J. Dudek, IJMPE 13, 107 (2004)] that taking into account the deformation dependence of the congruence energy proposed by Myers and Swiatecki significantly approaches the LSD-model barrier-heights to the experimental data in the case of light isotopes while the fission barriers for heavy nuclei remain nearly unchanged and agree well with experiment. It was also shown in Ref. [J. Bartel et al., IJMPE 16, 459, (2007)] that the saddle point masses of transactinides from 232Th to 250Cf evaluated using the LSD differ by less than 0.67 MeV from the experimental data.