dorsal/arxiv
View SchemaThe first excited states of 9Be and 9B
| Authors | V. D. Efros, J. M. Bang |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9802077 |
| URL | https://arxiv.org/abs/nucl-th/9802077 |
| DOI | 10.1007/s100500050201 |
| Journal | Eur.Phys.J. A4 (1999) 33-39 |
Abstract
It is found here that the 1/2+ first excited state of 9Be is a virtual state with the energy of -23.5 KeV. The line shape for the excitation of the state is approximated with a simple analytic form based on the effective range expansion. The partner in 9B of this state is found to be a resonance with a maximum in the peak at about 1.1 MeV, FWHM of 1.5 MeV, and complex energy of 0.6-i0.75 MeV. The line shape for its excitation is calculated in terms of the p-8Be phase shift. The phase shifts are obtained from N-8Be effective potentials deduced from the data on on the photodisintegration of 9Be. A possibility for direct extraction of the energy of the resonant state from experimental data is also discussed, and an expression for a residue at a virtual state pole in terms of a quadrature taken over the virtual state eigenfunction is given.
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"abstract": "It is found here that the 1/2+ first excited state of 9Be is a virtual state\nwith the energy of -23.5 KeV. The line shape for the excitation of the state is\napproximated with a simple analytic form based on the effective range\nexpansion. The partner in 9B of this state is found to be a resonance with a\nmaximum in the peak at about 1.1 MeV, FWHM of 1.5 MeV, and complex energy of\n0.6-i0.75 MeV. The line shape for its excitation is calculated in terms of the\np-8Be phase shift. The phase shifts are obtained from N-8Be effective\npotentials deduced from the data on on the photodisintegration of 9Be. A\npossibility for direct extraction of the energy of the resonant state from\nexperimental data is also discussed, and an expression for a residue at a\nvirtual state pole in terms of a quadrature taken over the virtual state\neigenfunction is given.",
"arxiv_id": "nucl-th/9802077",
"authors": [
"V. D. Efros",
"J. M. Bang"
],
"categories": [
"nucl-th",
"nucl-ex"
],
"doi": "10.1007/s100500050201",
"journal_ref": "Eur.Phys.J. A4 (1999) 33-39",
"title": "The first excited states of 9Be and 9B",
"url": "https://arxiv.org/abs/nucl-th/9802077"
},
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