DEFORMATION ENERGY OF SUPERHEAVY NUCLEI

Citation
Ra. Gherghescu et al., DEFORMATION ENERGY OF SUPERHEAVY NUCLEI, Journal of physics. G, Nuclear and particle physics, 23(11), 1997, pp. 1715-1732
Citations number
37
Categorie Soggetti
Physics, Particles & Fields","Physics, Nuclear
ISSN journal
09543899
Volume
23
Issue
11
Year of publication
1997
Pages
1715 - 1732
Database
ISI
SICI code
0954-3899(1997)23:11<1715:DEOSN>2.0.ZU;2-L
Abstract
We study the nuclear deformation energy of superheavy nuclei by using the macroscopic-microscopic method. Nuclear shape is determined by thr ee independent shape coordinates: separation distance between the frag ment centres; mass asymmetry, and neck radius. The Yukawa-plus-exponen tial model gives the macroscopic energy. Shell and pairing (microscopi c) corrections are calculated on the basis of a superasymmetric two-ce ntre shell model. Various spherical magic numbers in the region of sup erheavy nuclei are obtained by changing the strength of the spin-orbit coupling in the two-centre shell model. A complete set of kappa and m u values have been obtained leading to magic numbers up to 126 for pro tons and 184 for neutrons (including Z = 114, 120 and N = 172). Potent ial energy surfaces for nuclei (280)108, (298)114, and (304)120, plott ed versus the separation distance and mass asymmetry. Compact shapes, typical for synthesis by fusion reactions or cold fission, are assumed .