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This paper investigates the possibility of suppressing the ionization rate ina magnetostatic trap of metastable neon atoms by spin-polarizing the atoms.Suppression of the ionization is critical for the possibility of reachingBose-Einstein condensation with such atoms. We estimate the relevant long-rangeinteractions for the system, consisting of electric quadrupole-quadrupole anddipole-induced dipole terms, and develop short-range potentials based on theNa_2 singlet and triplet potentials. The auto-ionization widths of the systemare also calculated. With these ingredients we calculate the ionization ratefor spin-polarized and for spin-isotropic samples, caused by anisotropy of thelong-range interactions. We find that spin-polarization may allow for fourorders of magnitude suppression of the ionization rate for Ne. The resultsdepend sensitively on a precise knowledge of the interaction potentials,however, pointing out the need for experimental input. The same model gives asuppression ratio close to unity for metastable xenon in accordance withexperimental results, due to a much increased anisotropy in this case.Comment: 15 pages including figures, LaTex/RevTex, uses epsfig.st

Limit on suppression of ionization in metastable neon traps due to long-range anisotropy