dorsal/arxiv
View SchemaThree-body resonances in He-6, Li-6, and Be-6, and the soft dipole mode problem of neutron halo nuclei
| Authors | Attila Csoto |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9401005 |
| URL | https://arxiv.org/abs/nucl-th/9401005 |
| DOI | 10.1103/PhysRevC.49.3035 |
| Journal | Phys.Rev.C49:3035-3041,1994 |
Abstract
Using the complex scaling method, the low-lying three-body resonances of $^6$He, $^6$Li, and $^6$Be are investigated in a parameter-free microscopic three-cluster model. In $^6$He a 2$^+$, in $^6$Li a 2$^+$ and a 1$^+$, and in $^6$Be the 0$^+$ ground state and a 2$^+$ excited state is found. The other experimentally known 2$^+$ state of $^6$Li cannot be localized by our present method. We have found no indication for the existence of the predicted 1$^-$ soft dipole state in $^6$He. We argue that the sequential decay mode of $^6$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 $^{11}$Li, too. We propose an experimental analysis, which can decide between the soft dipole mode and the sequential decay mode.
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"abstract": "Using the complex scaling method, the low-lying three-body resonances of\n$^6$He, $^6$Li, and $^6$Be are investigated in a parameter-free microscopic\nthree-cluster model. In $^6$He a 2$^+$, in $^6$Li a 2$^+$ and a 1$^+$, and in\n$^6$Be the 0$^+$ ground state and a 2$^+$ excited state is found. The other\nexperimentally known 2$^+$ state of $^6$Li cannot be localized by our present\nmethod. We have found no indication for the existence of the predicted 1$^-$\nsoft dipole state in $^6$He. We argue that the sequential decay mode of $^6$He\nthrough the resonant states of its two-body subsystem can lead to peaks in the\nexcitation function. This process can explain the experimental results in the\ncase of $^{11}$Li, too. We propose an experimental analysis, which can decide\nbetween the soft dipole mode and the sequential decay mode.",
"arxiv_id": "nucl-th/9401005",
"authors": [
"Attila Csoto"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.49.3035",
"journal_ref": "Phys.Rev.C49:3035-3041,1994",
"title": "Three-body resonances in He-6, Li-6, and Be-6, and the soft dipole mode problem of neutron halo nuclei",
"url": "https://arxiv.org/abs/nucl-th/9401005"
},
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