Abstract
Low-lying states of A = 6 hypernuclear doublets ( 6 Λ He and 6 Λ Li) and A = 7 triplets ( 7 Λ He, 7 Λ Li, and 7 Λ Be) are studied with an accurate three-body model calculation in which all the rearrangement Jacobian coordinates are equally taken into account. Since most of the hypernuclear states concerned are weakly bound states, focus is placed on the binding energies with respect to the particle breakup thresholds and on the density distributions in the surface and exterior regions. With the α + Λ + N model, the observed binding energies of the ground states of 6 Λ He and 6 Λ Li are well reproduced. 6 Λ He is found to have a three-layer structure of the matter distribution: the α nuclear core, a Λ skin, and a neutron halo. The A = 7 hypernuclei are shown to be well described with the 5 Λ He + N+N model. Using a realistic NN interaction, the correlation between the valence nucleons is fully taken into account; this is essentially important to make the proton-rich three-body system 7 Λ Be = 5 Λ He + p+p bound although none of the two-body subsystems is bound. The observed binding energies of 7 Λ Li and 7 Λ Be are well reproduced, and energies are predicted for 7 Λ He whose core nucleus is a neutron halo nucleus, 6 He. We discuss the validity of the assumption of frozen deuterons adopted in the previous α + d + Λ models for the T = 0 states of 7 Λ Li.
| Original language | English |
|---|---|
| Pages (from-to) | 2075-2085 |
| Number of pages | 11 |
| Journal | Physical Review C - Nuclear Physics |
| Volume | 53 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - Jan 1 1996 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
Cite this
Three-body model study of A =6-7 hypernuclei : Halo and skin structures. / Hiyama, Emiko; Kamimura, Masayasu; Motoba, Toshio; Yamada, Taiichi; Yamamoto, Yasuo.
In: Physical Review C - Nuclear Physics, Vol. 53, No. 5, 01.01.1996, p. 2075-2085.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Three-body model study of A =6-7 hypernuclei
T2 - Halo and skin structures
AU - Hiyama, Emiko
AU - Kamimura, Masayasu
AU - Motoba, Toshio
AU - Yamada, Taiichi
AU - Yamamoto, Yasuo
PY - 1996/1/1
Y1 - 1996/1/1
N2 - Low-lying states of A = 6 hypernuclear doublets ( 6 Λ He and 6 Λ Li) and A = 7 triplets ( 7 Λ He, 7 Λ Li, and 7 Λ Be) are studied with an accurate three-body model calculation in which all the rearrangement Jacobian coordinates are equally taken into account. Since most of the hypernuclear states concerned are weakly bound states, focus is placed on the binding energies with respect to the particle breakup thresholds and on the density distributions in the surface and exterior regions. With the α + Λ + N model, the observed binding energies of the ground states of 6 Λ He and 6 Λ Li are well reproduced. 6 Λ He is found to have a three-layer structure of the matter distribution: the α nuclear core, a Λ skin, and a neutron halo. The A = 7 hypernuclei are shown to be well described with the 5 Λ He + N+N model. Using a realistic NN interaction, the correlation between the valence nucleons is fully taken into account; this is essentially important to make the proton-rich three-body system 7 Λ Be = 5 Λ He + p+p bound although none of the two-body subsystems is bound. The observed binding energies of 7 Λ Li and 7 Λ Be are well reproduced, and energies are predicted for 7 Λ He whose core nucleus is a neutron halo nucleus, 6 He. We discuss the validity of the assumption of frozen deuterons adopted in the previous α + d + Λ models for the T = 0 states of 7 Λ Li.
AB - Low-lying states of A = 6 hypernuclear doublets ( 6 Λ He and 6 Λ Li) and A = 7 triplets ( 7 Λ He, 7 Λ Li, and 7 Λ Be) are studied with an accurate three-body model calculation in which all the rearrangement Jacobian coordinates are equally taken into account. Since most of the hypernuclear states concerned are weakly bound states, focus is placed on the binding energies with respect to the particle breakup thresholds and on the density distributions in the surface and exterior regions. With the α + Λ + N model, the observed binding energies of the ground states of 6 Λ He and 6 Λ Li are well reproduced. 6 Λ He is found to have a three-layer structure of the matter distribution: the α nuclear core, a Λ skin, and a neutron halo. The A = 7 hypernuclei are shown to be well described with the 5 Λ He + N+N model. Using a realistic NN interaction, the correlation between the valence nucleons is fully taken into account; this is essentially important to make the proton-rich three-body system 7 Λ Be = 5 Λ He + p+p bound although none of the two-body subsystems is bound. The observed binding energies of 7 Λ Li and 7 Λ Be are well reproduced, and energies are predicted for 7 Λ He whose core nucleus is a neutron halo nucleus, 6 He. We discuss the validity of the assumption of frozen deuterons adopted in the previous α + d + Λ models for the T = 0 states of 7 Λ Li.
UR - http://www.scopus.com/inward/record.url?scp=0030545418&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0030545418&partnerID=8YFLogxK
U2 - 10.1103/PhysRevC.53.2075
DO - 10.1103/PhysRevC.53.2075
M3 - Article
AN - SCOPUS:0030545418
VL - 53
SP - 2075
EP - 2085
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
SN - 0556-2813
IS - 5
ER -