PROPERTIES OF THE BOUND S STATES (L=0) IN COULOMB 3-BODY SYSTEMS WITH UNIT CHARGES

Various energetic, geometric, and other properties for the ground and first vibrationally excited S states (L=0) of Coulomb three-body systems having unit charges are obtained by means of accurate exponential wave functions. The mass dependence of the properties for these systems has a relatively smooth form for the ground states. The results presented should be useful as a basis for further investigation of these three-body systems. The prethreshold (weakly bound) exotic nonsymmetric systems (d+t+p-, μ+π+μ-, and μ+π+π-) considered have sharp cluster structures, i.e., the lighter positive ion moves in the field of the neutral pair (e.g., d+ in d+t+p- moves in the field of t+p-). © 1995 The American Physical Society.