dorsal/arxiv
View SchemaVanishing Gamow-Teller Transition Rate for A=14 and the Nucleon-Nucleon Interaction in the Medium
| Authors | M. S. Fayache, L. Zamick, H. Muether |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9908009 |
| URL | https://arxiv.org/abs/nucl-th/9908009 |
| DOI | 10.1103/PhysRevC.60.067305 |
| Journal | Phys.Rev. C60 (1999) 067305 |
Abstract
The problem of the near vanishing of the Gamow-Teller transition ($GT$) in the A=14 system between the lowest $J=0^+~ T=1$ and $J=1^+~ T=0$ states is revisited. The model space is extended from the valence space $(p^{-2})$ to the valence space plus all 2$\hbar \omega$ excitations. The question is addressed as to what features of the effective nucleon-nucleon interaction in the medium are required to obtain the vanishing $GT$ strength in this extended space. It turns out that a combination of a realistic strength of the tensor force combined with a spin-orbit interaction which is enhanced as compared to the free interaction yields a vanishing $GT$ strength. Such an interaction can be derived from a microscopic meson exchange potential if the enhancement of the small component of the Dirac spinors for the nucleons is taken into account.
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"abstract": "The problem of the near vanishing of the Gamow-Teller transition ($GT$) in\nthe A=14 system between the lowest $J=0^+~ T=1$ and $J=1^+~ T=0$ states is\nrevisited. The model space is extended from the valence space $(p^{-2})$ to the\nvalence space plus all 2$\\hbar \\omega$ excitations. The question is addressed\nas to what features of the effective nucleon-nucleon interaction in the medium\nare required to obtain the vanishing $GT$ strength in this extended space. It\nturns out that a combination of a realistic strength of the tensor force\ncombined with a spin-orbit interaction which is enhanced as compared to the\nfree interaction yields a vanishing $GT$ strength. Such an interaction can be\nderived from a microscopic meson exchange potential if the enhancement of the\nsmall component of the Dirac spinors for the nucleons is taken into account.",
"arxiv_id": "nucl-th/9908009",
"authors": [
"M. S. Fayache",
"L. Zamick",
"H. Muether"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.60.067305",
"journal_ref": "Phys.Rev. C60 (1999) 067305",
"title": "Vanishing Gamow-Teller Transition Rate for A=14 and the Nucleon-Nucleon Interaction in the Medium",
"url": "https://arxiv.org/abs/nucl-th/9908009"
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