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

Journal Article · Wed Jun 01 04:00:00 EDT 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.49.3035· OSTI ID:7238910

Csoto, A ^[1]

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1. W. K. Kellogg Radiation Laboratory, 106-38, California Institute of Technology, Pasadena, California 91125 (United States)

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.

• OSTI ID: 7238910
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 49:6; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
BARYONS
BERYLLIUM 6
BERYLLIUM ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CLUSTER MODEL
DIPOLES
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
FERMIONS
HADRONS
HELIUM 6
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
LITHIUM 6
LITHIUM ISOTOPES
MANY-BODY PROBLEM
MATHEMATICAL MODELS
MILLISEC LIVING RADIOISOTOPES
MULTIPOLES
NEUTRONS
NUCLEAR MODELS
NUCLEI
NUCLEONS
ODD-ODD NUCLEI
RADIOISOTOPES
RESONANCE
SCALING
STABLE ISOTOPES
THREE-BODY PROBLEM