2007/07/14 by Yoshiko Kanada-En’yo, Yoshiko Kanada-En'yo
Chemistry · Physics and Astronomy · #Algorithm #Atomic and Subatomic Physics Research #Atomic physics #Chemistry #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Coupling (piping) #Crystallography #Excited state #Ground state #Materials science #Physics #Quantum, superfluid, helium dynamics #State (computer science) #Wave function #nucl-th
paper · pdf · doi:10.1103/physrevc.76.044323
published as Phys.Rev.C76:044323,2007 · 12 pages, 5 figures, submitted to PRC
arxiv created 2007/07/14 · openalex publication_date 2007/10/29 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The ground and excited states of 8He were investigated with a method of antisymmetrized molecular dynamics (AMD). We adopted effective nuclear interactions that systematically reproduce the binding energies of 4He, 6He, and 8He. The ground state of 8He has both the j\text\ensuremath-j coupling feature (p3/2 closure) and the L\text\ensuremath-S coupling feature (4He+2n+2n) with a slight tail of dineutron at the long distance region. The theoretical results give an indication of the 02+ state with a dineutron gaslike structure, where two dineutrons are moving in an S wave around the \ensuremathα core with a dilute density. The dineutron structure (4He+2n+2n) of this state is similar to the 3\ensuremathα-cluster structure of the 12C(02+) state, which has been interpreted as an \ensuremathα condensate state. Because the 8He(02+) state has a significant overlap with the dineutron condensate wave function, we suggest that this theoretically predicted 02+ state is a candidate for the dineutron condensate state.