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Long-range potential for excess electron surface states on helium clusters

Jortner J., Rosenblit M.

Polish Journal of Chemistry

1998

Vol. 72, nr 7S

1447-2453

An excess electron bound to a ((4)He)N cluster (number of constituents N>/=3 x 10(5) and cluster radius R>/=R-c=149 A) exhibits a divergence of the first moment {r} of the charge distribution near the localization threshold (R=R-c), obeying the scaling law {r} infinity (R - R-c)(-1). The asymptotic form of the elektron-cluster potential has to be modified to include Casimir-Spruch retardation effects, which provide a small repulsive contribution O(h/mc)r(-1).