Showing papers by "Chong Qi published in 2010"
TL;DR: An abrupt change in alpha-decay systematics around the N = 126 neutron shell closure is discussed in this paper, which is explained as a sudden hindrance of the clustering of the nucleons that eventually form the a...
Abstract: An abrupt change in alpha-decay systematics around the N = 126 neutron shell closure is discussed. It is explained as a sudden hindrance of the clustering of the nucleons that eventually form the a ...
37 citations
TL;DR: For a system with three identical nucleons in a single-$j$ shell, the states can be written as the angular-momentum coupling of a nucleon pair and the odd nucleon as mentioned in this paper.
Abstract: For a system with three identical nucleons in a single-$j$ shell, the states can be written as the angular-momentum coupling of a nucleon pair and the odd nucleon. The overlaps between these nonorthonormal states form a matrix that coincides with the one derived by Rowe and Rosensteel [Phys. Rev. Lett. 87, 172501 (2001)]. The propositions they state are related to the eigenvalue problems of the matrix and dimensions of the associated subspaces. In this work, the propositions are proven from the symmetric properties of the $6j$ symbols. Algebraic expressions for the dimension of the states, eigenenergies, as well as conditions for conservation of seniority can be derived from the matrix.
21 citations
TL;DR: For systems with three and four fermions within a single-j shell, analytical expressions for the state energies are presented from a decomposition of the angular momentum as mentioned in this paper, which may help us in understanding the structure of isomeric states.
Abstract: For systems with three and four fermions within a single-j shell, analytical expressions for the state energies are presented from a decomposition of the angular momentum. In some important cases the expressions acquire a very simple form. The expression may help us in understanding the structure of isomeric states. The decomposition also makes it possible to construct the algebraic condition for conservation of seniority.
19 citations
TL;DR: In this paper, the authors analyzed the decay widths of high-lying resonances in {sup 24}Mg using a cluster model and found that the calculated widths are sensitive to the angular momentum carried by the outgoing cluster.
Abstract: Exotic {sup 8}Be and {sup 12}C decays from high-lying resonances in {sup 24}Mg are analyzed in terms of a cluster model. The calculated quantities agree well with the corresponding experimental data. It is found that the calculated decay widths are very sensitive to the angular momentum carried by the outgoing cluster. It is shown that this property makes cluster decay a powerful tool to determine the spin as well as the molecular structures of the resonances.
10 citations
Journal Article•
TL;DR: In this article, the decay widths of 8 Be and 12 C were analyzed in terms of a cluster model and it was shown that the calculated decay width is sensitive to the angular momentum carried by the outgoing cluster.
Abstract: Exotic 8 Be and 12 C decays from high-lying resonances in 24 Mg are analyzed in terms of a cluster model. The calculated quantities agree well with the corresponding experimental data. It is found that the calculated decay widths are very sensitive to the angular momentum carried by the outgoing cluster. It is shown that this property makes cluster decay a powerful tool to determine the spin as well as the molecular structures of the resonances.
3 citations
Posted Content•
TL;DR: In this paper, the unbound nucleus of the $^{12}$Li was evaluated by using the multistep shell model in the complex energy plane assuming that the spectrum is determined by the motion of three neutrons outside the $^9$Li core.
Abstract: The unbound nucleus $^{12}$Li is evaluated by using the multistep shell model in the complex energy plane assuming that the spectrum is determined by the motion of three neutrons outside the $^9$Li core. It is found that the ground state of this system consists of an antibound $1/2^+$ state and that only this and a $1/2^-$ and a $5/2^+$ excited states are physically meaningful resonances.
1 citations