dorsal/arxiv
View SchemaLimit on suppression of ionization in metastable neon traps due to long-range anisotropy
| Authors | M. R. Doery, E. J. D. Vredenbregt, S. S. Op de Beek, H. C. W. Beijerinck, B. J. Verhaar |
|---|---|
| Categories | |
| ArXiv ID | physics/9806018 |
| URL | https://arxiv.org/abs/physics/9806018 |
| DOI | 10.1103/PhysRevA.58.3673 |
Abstract
This paper investigates the possibility of suppressing the ionization rate in a magnetostatic trap of metastable neon atoms by spin-polarizing the atoms. Suppression of the ionization is critical for the possibility of reaching Bose-Einstein condensation with such atoms. We estimate the relevant long-range interactions for the system, consisting of electric quadrupole-quadrupole and dipole-induced dipole terms, and develop short-range potentials based on the Na_2 singlet and triplet potentials. The auto-ionization widths of the system are also calculated. With these ingredients we calculate the ionization rate for spin-polarized and for spin-isotropic samples, caused by anisotropy of the long-range interactions. We find that spin-polarization may allow for four orders of magnitude suppression of the ionization rate for Ne. The results depend sensitively on a precise knowledge of the interaction potentials, however, pointing out the need for experimental input. The same model gives a suppression ratio close to unity for metastable xenon in accordance with experimental results, due to a much increased anisotropy in this case.
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"abstract": "This paper investigates the possibility of suppressing the ionization rate in\na magnetostatic trap of metastable neon atoms by spin-polarizing the atoms.\nSuppression of the ionization is critical for the possibility of reaching\nBose-Einstein condensation with such atoms. We estimate the relevant long-range\ninteractions for the system, consisting of electric quadrupole-quadrupole and\ndipole-induced dipole terms, and develop short-range potentials based on the\nNa_2 singlet and triplet potentials. The auto-ionization widths of the system\nare also calculated. With these ingredients we calculate the ionization rate\nfor spin-polarized and for spin-isotropic samples, caused by anisotropy of the\nlong-range interactions. We find that spin-polarization may allow for four\norders of magnitude suppression of the ionization rate for Ne. The results\ndepend sensitively on a precise knowledge of the interaction potentials,\nhowever, pointing out the need for experimental input. The same model gives a\nsuppression ratio close to unity for metastable xenon in accordance with\nexperimental results, due to a much increased anisotropy in this case.",
"arxiv_id": "physics/9806018",
"authors": [
"M. R. Doery",
"E. J. D. Vredenbregt",
"S. S. Op de Beek",
"H. C. W. Beijerinck",
"B. J. Verhaar"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevA.58.3673",
"title": "Limit on suppression of ionization in metastable neon traps due to long-range anisotropy",
"url": "https://arxiv.org/abs/physics/9806018"
},
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