2020/11/25 by Naoyuki Itagaki, N. Itagaki, Tomoya Naito
Physics and Astronomy · #Atomic and Molecular Physics #Atomic physics #Cluster (spacecraft) #Coupled cluster #Coupling (piping) #Excitation #Excited state #GCM transcription factors #General Circulation Model #Generator (circuit theory) #Materials science #Nuclear physics research studies #Pairing #Particle (ecology) #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Statistical physics #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevc.103.044303
published as Phys. Rev. C 103, 044303 (2021) · 8 pages, 4 figures
arxiv created 2020/11/25 · openalex created_date 2020/12/07 · openalex publication_date 2021/04/01 · arxiv updated 2021/04/06 · openalex updated_date 2026/08/05
Cluster dynamics and single-particle correlation are simultaneously treated for the description of the ground state of 12C. The recent development of the antisymmetrized quasicluster model (AQCM) makes it possible to generate jj-coupling shell-model wave functions from \ensuremathα cluster models. The cluster dynamics and the competition with the jj-coupling shell-model structure can be estimated rather easily. In the present study, we further include the effect of single-particle excitation; the mixing of the two-particle--two-hole excited states is considered. The single-particle excitation is not always taken into account in the standard cluster model analyses, and the two-particle--two-hole states are found to strongly contribute to the lowering of the ground state owing to the pairing-like correlations. By extending AQCM, all of the basis states are prepared on the same footing, and they are superposed based on the framework of the generator coordinate method (GCM).