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Titolo:
Three-body binding and resonant mechanisms in neutron-rich light nuclei far from stability line - Pairing correlation in Borromean nuclei
Autore:
Aoyama, S; Kato, K; Ikeda, K;
Indirizzi:
Kitami Inst Technol, Informat Proc Ctr, Kitami, Hokkaido 0908507, Japan Kitami Inst Technol Kitami Hokkaido Japan 0908507 Hokkaido 0908507, Japan Hokkaido Univ, Grad Sch Sci, Div Phys, Sapporo, Hokkaido 0600810, Japan Hokkaido Univ Sapporo Hokkaido Japan 0600810 oro, Hokkaido 0600810, Japan RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan RIKEN Wako Saitama Japan 3510198 & Chem Res, Wako, Saitama 3510198, Japan
Titolo Testata:
PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT
fascicolo: 142, , anno: 2001,
pagine: 35 - 95
SICI:
0375-9687(2001):142<35:TBARMI>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOFT DIPOLE MODE; INTERACTION CROSS-SECTIONS; ORBITAL SHELL-MODEL; MICROSCOPIC MULTICLUSTER DESCRIPTION; ORTHOGONALITY CONDITION MODEL; STOCHASTIC VARIATIONAL METHOD; CLUSTER-MODEL; HALO STRUCTURE; MIRROR NUCLEI; 3-BODY MODEL;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
120
Recensione:
Indirizzi per estratti:
Indirizzo: Aoyama, S Kitami Inst Technol, Informat Proc Ctr, Kitami, Hokkaido 0908507, Japan Kitami Inst Technol Kitami Hokkaido Japan 0908507 908507, Japan
Citazione:
S. Aoyama et al., "Three-body binding and resonant mechanisms in neutron-rich light nuclei far from stability line - Pairing correlation in Borromean nuclei", PROG T PH S, (142), 2001, pp. 35-95

Abstract

We study the typical Borromean systems of He-4+n+n for He-6 and of Li-9+n+n for Li-11. In addition to these three body systems, we investigate the He-8+n+n ground resonance state in He-10. In understanding the binding mechanism of these loosely or unbound systems of the core+two valence neutrons, it is shown that the pairing correlation between valence neutrons becomes important. For the excited resonance states in He-6 and for the ground resonance state in He-10, we extensively use the complex scaling method (CSM) to solve the three body resonance problems. The CSM is shown to be very usefulnot only for analysis of the observed 2(+) state in He-6 and the ground state in He-10 but also for prediction of three new 2(2)(+) 1(1)(+) and 0(2)() resonance states in He-6. These results present that the core+n+n model explains characteristic properties of He-6. On the other hand, we discuss that a Li-9+n+n model for Li-11 is not so simple as the He-6 case. To solve the binding energy problem, the Li-9-n interaction is investigated in detail. Our much interest is concentrated on the the pairing correlation not only between valence neutrons but also between neutrons in the Li-9-core. By taking into account pairing configurations in addition to the simple neutron(p(3/2))-closed configuration, we show that the pairing blocking effect ofcore neutrons plays a very important role in understanding the low-lying single particle s-state in Li-10 and the strong state-depending Li-9-n interaction. As a possibility of the experimental checking for the low-lying s-state in Li-10, we discuss the observation of the so-called Thomas-Ehrman shift in the mirror nucleus N-10, which has not been observed yet.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 00:35:12