ASYMMETRICAL CONFIGURATIONS IN COULOMBIC RIGID ROTATORS

We investigate possible asymmetrical configurations of Coulombic three -body systems (A(n-)+B-m++B-m+), within Langmuir's rigid-rotator model . The recently found effect by Poirier [Phys. Rev. A 40, 3498 (1989)] that in the two-electron atoms asymmetrical configurations appear poss ible for certain charge ratios n/m (in addition to symmetrical ones) h as been generalized to constituents of arbitrary masses. Results for r ealistic cases of the charge ratios 1/2 and 2/3 are presented. It is f ound that these systems possess the same type of degrees of instabilit ies as those investigated by Poirier.