Strong dineutron correlation in 8He and 18C
| dc.creator | Hagino, K. | |
| dc.creator | Takahashi, N. | |
| dc.creator | Sagawa, H. | |
| dc.date | 2008-03-22 | |
| dc.date.accessioned | 2026-07-07T11:33:18Z | |
| dc.date.available | 2026-07-07T11:33:18Z | |
| dc.description | We study the spatial structure of four valence neutrons in the ground state of $^8$He and $^{18}$C nuclei using a core+4$n$ model. For this purpose, we employ a density-dependent contact interaction among the valence neutrons, and solve the five-body Hamiltonian in the Hartree-Fock-Bogoliubov (HFB) approximation. We show that two neutrons with the coupled spin of $S$=0 exhibit a strong dineutron correlation around the surface of these nuclei, whereas the correlation between the two dineutrons is much weaker. Our calculation indicates that the probability of the (1p$_{3/2})^4$ and [(1p$_{3/2})^2$ (p$_{1/2})^2$] configurations in the ground state wave function of $^8$He nucleus is 34.9% and 23.7%, respectively. This is consistent with the recent experimental finding with the $^8$He($p,t)^6$He reaction, that is, the ground state wave function of $^8$He deviates significantly from the pure (1p$_{3/2})^4$ structure. | |
| dc.description | 10 pages, 9 figures, 3 tables | |
| dc.identifier | https://arxiv.org/abs/0803.3258 | |
| dc.identifier | http://arxiv.org/abs/0803.3258 | |
| dc.identifier | Phys.Rev.C77:054317,2008 | |
| dc.identifier | doi:10.1103/PhysRevC.77.054317 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/197845 | |
| dc.subject | Nuclear Theory | |
| dc.title | Strong dineutron correlation in 8He and 18C | |
| dc.type | text |