dorsal/arxiv
View SchemaNucleon polarization in three-body models of polarized \bbox{^6}Li
| Authors | N. W. Schellingerhout, L. P. Kok, S. A. Coon, R. M. Adam |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9309012 |
| URL | https://arxiv.org/abs/nucl-th/9309012 |
| DOI | 10.1103/PhysRevC.48.2714 10.1103/PhysRevC.52.439 |
| Journal | Phys.Rev.C48:2714-2730,1993; Erratum-ibid.C52:439,1995; Phys.Rev. C52:439,1995 |
Abstract
Just as $^3\roarrow{\rm He}$ can be approximately characterized as a polarized neutron target, polarized \Li6D has been advocated as a good {\em isoscalar} nuclear target for the extraction of the polarized gluon content of the nucleon. The original argument rests upon a presumed ``alpha + deuteron'' picture of \Li6, with the polarization of the nucleus carried by the polarization of the deuteron. We have calculated the polarization of the constituents of \Li6 as a three-body bound state of $\alpha + n + p$ interacting with local potentials fitted to the scattering data. It is necessary to include partial waves up to $j=17/2$ (75 channels, or, when including the $T=1$ state, 150 channels) in the Faddeev equations before the energy eigenvalue converges. The longitudinal formfactors are then described well by the wave function. Various combinations of $\alpha$N and NN strong and Coulomb potentials yield a straight line in the charge radius {\em vs.} energy plane which, unlike those of previous calculations, passes through the experimental datum. We find for all cases a polarization of the valence neutron in excess of 90\%. This may make polarized \Li6D an attractive target for many nuclear physics purposes, since its neutrons are effectively 45\% polarized.
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"abstract": "Just as $^3\\roarrow{\\rm He}$ can be approximately characterized as a\npolarized neutron target, polarized \\Li6D has been advocated as a good {\\em\nisoscalar} nuclear target for the extraction of the polarized gluon content of\nthe nucleon. The original argument rests upon a presumed ``alpha + deuteron\u0027\u0027\npicture of \\Li6, with the polarization of the nucleus carried by the\npolarization of the deuteron. We have calculated the polarization of the\nconstituents of \\Li6 as a three-body bound state of $\\alpha + n + p$\ninteracting with local potentials fitted to the scattering data. It is\nnecessary to include partial waves up to $j=17/2$ (75 channels, or, when\nincluding the $T=1$ state, 150 channels) in the Faddeev equations before the\nenergy eigenvalue converges. The longitudinal formfactors are then described\nwell by the wave function. Various combinations of $\\alpha$N and NN strong and\nCoulomb potentials yield a straight line in the charge radius {\\em vs.} energy\nplane which, unlike those of previous calculations, passes through the\nexperimental datum. We find for all cases a polarization of the valence neutron\nin excess of 90\\%. This may make polarized \\Li6D an attractive target for many\nnuclear physics purposes, since its neutrons are effectively 45\\% polarized.",
"arxiv_id": "nucl-th/9309012",
"authors": [
"N. W. Schellingerhout",
"L. P. Kok",
"S. A. Coon",
"R. M. Adam"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.48.2714 10.1103/PhysRevC.52.439",
"journal_ref": "Phys.Rev.C48:2714-2730,1993; Erratum-ibid.C52:439,1995; Phys.Rev.\n C52:439,1995",
"title": "Nucleon polarization in three-body models of polarized \\bbox{^6}Li",
"url": "https://arxiv.org/abs/nucl-th/9309012"
},
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