dorsal/arxiv
View SchemaThe Question of Low-Lying Intruder States in $^8Be$ and Neighboring Nuclei
| Authors | M. S. Fayache, E. Moya de Guerra, P. Sarriguren, Y. Y. Sharon, L. Zamick |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9710056 |
| URL | https://arxiv.org/abs/nucl-th/9710056 |
| DOI | 10.1103/PhysRevC.57.2351 |
| Journal | Phys.Rev.C57:2351-2358,1998 |
Abstract
The presence of not yet detected intruder states in $^{8}Be$ e.g. a $J=2^{+}$ intruder at 9 $MeV$ excitation would affect the shape of the $\beta ^{\mp }$-delayed alpha spectra of $^{8}Li$ and $^{8}B$. In order to test the plausibility of this assumption, shell model calculations with up to $4\hbar \omega $ excitations in $^{8}Be$ (and up to $2\hbar \omega $ excitations in $^{10}Be$) were performed. With the above restrictions on the model spaces, the calculations did not yield any low-lying intruder state in $^{8}Be$. Another approach -the simple deformed oscillator model with self-consistent frequencies and volume conservation gives an intruder state in $^{8}Be$ which is lower in energy than the above shell model results, but its energy is still considerably higher than 9 $MeV$.
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"abstract": "The presence of not yet detected intruder states in $^{8}Be$ e.g. a $J=2^{+}$\nintruder at 9 $MeV$ excitation would affect the shape of the $\\beta ^{\\mp\n}$-delayed alpha spectra of $^{8}Li$ and $^{8}B$. In order to test the\nplausibility of this assumption, shell model calculations with up to $4\\hbar\n\\omega $ excitations in $^{8}Be$ (and up to $2\\hbar \\omega $ excitations in\n$^{10}Be$) were performed. With the above restrictions on the model spaces, the\ncalculations did not yield any low-lying intruder state in $^{8}Be$. Another\napproach -the simple deformed oscillator model with self-consistent frequencies\nand volume conservation gives an intruder state in $^{8}Be$ which is lower in\nenergy than the above shell model results, but its energy is still considerably\nhigher than 9 $MeV$.",
"arxiv_id": "nucl-th/9710056",
"authors": [
"M. S. Fayache",
"E. Moya de Guerra",
"P. Sarriguren",
"Y. Y. Sharon",
"L. Zamick"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.57.2351",
"journal_ref": "Phys.Rev.C57:2351-2358,1998",
"title": "The Question of Low-Lying Intruder States in $^8Be$ and Neighboring Nuclei",
"url": "https://arxiv.org/abs/nucl-th/9710056"
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