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Title: Three-body resonances in [sup 6]He, [sup 6]Li, and [sup 6]Be, and the soft dipole mode problem of neutron halo nuclei

Abstract

Using the complex scaling method, the low-lying three-body resonances of [sup 6]He, [sup 6]Li, and [sup 6]Be are investigated in a parameter-free microscopic three-cluster model. In [sup 6]He a 2[sup +], in [sup 6]Li a 2[sup +] and a 1[sup +], and in [sup 6]Be the 0[sup +] ground state and a 2[sup +] excited state are found. The other experimentally known 2[sup +] state of [sup 6]Li cannot be localized by our present method. We have found no indication for the existence of the predicted 1[sup [minus]] soft dipole state in [sup 6]He. We argue that the sequential decay mode of [sup 6]He through the resonant states of its two-body subsystem can lead to peaks in the excitation function. This process can explain the experimental results in the case of [sup 11]Li, too. We propose an experimental analysis, which can decide between the soft dipole mode and the sequential decay mode.

Authors:
 [1]
  1. (W. K. Kellogg Radiation Laboratory, 106-38, California Institute of Technology, Pasadena, California 91125 (United States))
Publication Date:
OSTI Identifier:
7238910
Alternate Identifier(s):
OSTI ID: 7238910
Resource Type:
Journal Article
Journal Name:
Physical Review, C (Nuclear Physics); (United States)
Additional Journal Information:
Journal Volume: 49:6; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BERYLLIUM 6; CLUSTER MODEL; RESONANCE; HELIUM 6; LITHIUM 6; DIPOLES; NEUTRONS; SCALING; THREE-BODY PROBLEM; ALKALI METAL ISOTOPES; ALKALINE EARTH ISOTOPES; BARYONS; BERYLLIUM ISOTOPES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; ELEMENTARY PARTICLES; EVEN-EVEN NUCLEI; FERMIONS; HADRONS; HELIUM ISOTOPES; ISOTOPES; LIGHT NUCLEI; LITHIUM ISOTOPES; MANY-BODY PROBLEM; MATHEMATICAL MODELS; MILLISEC LIVING RADIOISOTOPES; MULTIPOLES; NUCLEAR MODELS; NUCLEI; NUCLEONS; ODD-ODD NUCLEI; RADIOISOTOPES; STABLE ISOTOPES 663120* -- Nuclear Structure Models & Methods-- (1992-); 663110 -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-); 663300 -- Nuclear Reactions & Scattering, General-- (1992-); 663520 -- Nuclear Mass Ranges-- A=6-19-- (1992-)

Citation Formats

Csoto, A. Three-body resonances in [sup 6]He, [sup 6]Li, and [sup 6]Be, and the soft dipole mode problem of neutron halo nuclei. United States: N. p., 1994. Web. doi:10.1103/PhysRevC.49.3035.
Csoto, A. Three-body resonances in [sup 6]He, [sup 6]Li, and [sup 6]Be, and the soft dipole mode problem of neutron halo nuclei. United States. doi:10.1103/PhysRevC.49.3035.
Csoto, A. Wed . "Three-body resonances in [sup 6]He, [sup 6]Li, and [sup 6]Be, and the soft dipole mode problem of neutron halo nuclei". United States. doi:10.1103/PhysRevC.49.3035.
@article{osti_7238910,
title = {Three-body resonances in [sup 6]He, [sup 6]Li, and [sup 6]Be, and the soft dipole mode problem of neutron halo nuclei},
author = {Csoto, A.},
abstractNote = {Using the complex scaling method, the low-lying three-body resonances of [sup 6]He, [sup 6]Li, and [sup 6]Be are investigated in a parameter-free microscopic three-cluster model. In [sup 6]He a 2[sup +], in [sup 6]Li a 2[sup +] and a 1[sup +], and in [sup 6]Be the 0[sup +] ground state and a 2[sup +] excited state are found. The other experimentally known 2[sup +] state of [sup 6]Li cannot be localized by our present method. We have found no indication for the existence of the predicted 1[sup [minus]] soft dipole state in [sup 6]He. We argue that the sequential decay mode of [sup 6]He through the resonant states of its two-body subsystem can lead to peaks in the excitation function. This process can explain the experimental results in the case of [sup 11]Li, too. We propose an experimental analysis, which can decide between the soft dipole mode and the sequential decay mode.},
doi = {10.1103/PhysRevC.49.3035},
journal = {Physical Review, C (Nuclear Physics); (United States)},
issn = {0556-2813},
number = ,
volume = 49:6,
place = {United States},
year = {1994},
month = {6}
}