Furong Xu

Universal decay law in charged-particle emission and exotic cluster radioactivity.

A linear universal decay formula is presented starting from the microscopic mechanism of the charged-particle emission. It relates the half-lives of monopole radioactive decays with the Q values of the outgoing particles as well as the masses and charges of the nuclei involved in the decay. This relation is found to be a generalization of the Geiger-Nuttall law in alpha radioactivity and explains well all known cluster decays. Predictions on the most likely emissions of various clusters are presented.

Enhanced Stability of Superheavy Nuclei Due to High-Spin Isomerism

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

Microscopic mechanism of charged-particle radioactivity and generalization of the Geiger-Nuttall law

A linear relation for charged-particle emissions is presented starting from the microscopic mechanism of the radioactive decay. It relates the logarithms of the decay half-lives with two variables, called {chi}{sup } and {rho}{sup }, which depend upon the Q values of the outgoing clusters as well as the masses and charges of the nuclei involved in the decay. This relation explains well all known cluster decays. It is found to be a generalization of the Geiger-Nuttall law in {alpha} radioactivity, and therefore we call it the universal decay law. Predictions of the most likely emissions of various clusters are presented by applying the law over the whole nuclear chart. It is seen that the decays of heavier clusters with nonequal proton and neutron numbers are mostly located in the trans-lead region. The emissions of clusters with equal protons and neutrons, like {sup 12}C and {sup 16}O, are possible in some neutron-deficient nuclei with Z{>=}54.

Shell-model study of boron, carbon, nitrogen, and oxygen isotopes with a monopole-based universal interaction

We study boron, carbon, nitrogen and oxygen isotopes with a newly constructed shell-model Hamiltonian developed from monopole-based-universal interaction (

Mirror energy difference and the structure of loosely bound proton-rich nuclei around A=20

V_{MU}

Competing phenomena: high-seniority excitations and γ-softness in 184Os

). The present Hamiltonian can reproduce well the ground-state energies, energy levels, electric quadrupole properties and spin properties of these nuclei in full psd model space including

High-K isomerism in rotational nuclei

(0-3)hbaromega

Shell evolution in neutron-rich carbon isotopes: Unexpected enhanced role of neutron-neutron correlation

excitations. Especially, it correctly describes the drip lines of carbon and oxygen isotopes and the spins of the ground states of

Shell-model study of spectroscopies and isospin structures in odd–odd N=Z nuclei employing realistic NN interaction

^{10}

Isomerism in the “south-east” of 132Sn and a predicted neutron-decaying isomer in 129Pd

B and