Seminar Details

Superheavy nuclei at high spin: shell energy, fission barrier & single-particle spectrum

Teng Lek Khoo, Argonne National Laboratory
Wednesday, October 31, 4:00 PM - Nuclear Science Seminar
NSCL Lecture Hall

Superheavy elements represent a large extension (44% in atomic number Z) beyond lead, the last stable element. They occur only because a shell-correction energy provides extra binding, thereby creating a fission barrier, where none would otherwise exist. The shell energy arises from gaps in the single-particle energies. Therefore, the essential properties of superheavy nuclei are: the magnitude of the fission barrier, shell energy and single-particle spectrum. This talk will present results on these core properties. For these heavy nuclei the cross sections are miniscule, but it is now possible to study them at three simultaneous limits: in Z, spin and excitation energy. High-spin properties provide not only additional insight and tests of theory, but are also important because superheavy nuclei are formed at large angular momentum.