Enhanced Stability of Superheavy Nuclei due to High-Spin Isomerism

Details Enhanced Stability of Superheavy Nuclei due to High-Spin Isomerism Enhanced Stability of Superheavy Nuclei due to High-Spin Isomerism

2004-04-30

arxiv.org/abs/nucl-th/0404093v1

Phys.Rev.Lett. 92 (2004) 252501

Physics

Nuclear Physics

Nuclear Theory

4 pages, 5 figures, accepted for publication in PRL

Scientific paper

10.1103/PhysRevLett.92.252501

Configuration-constrained calculations of potential-energy surfaces in even-even superheavy nuclei reveal systematically the existence at low excitation energies of multi-quasiparticle states with deformed axially symmetric shapes and large angular momenta. These results indicate the prevalence of long-lived, multi-quasiparticle isomers. In a quantal system, the ground state is usually more stable than the excited states. In contrast, in superheavy nuclei the multi-qausiparticle excitations decrease the probability for both fission and $\alpha$ decay, implying enhanced stability. Hence, the systematic occurrence of multi-qausiparticle isomers may become crucial for future production and study of even heavier nuclei. The energies of multi-quasiparticle states and their $\alpha$ decays are calculated and compared to available data.

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