Аннотации:
Very accurate quantum mechanical calculations of the first five vibrational states of the 4He3He+ molecular
ion are reported. The calculations have been performed explicitly including the coupling of the electronic and
nuclear motions i.e., without assuming the Born-Oppenheimer BO approximation . The nonrelativistic
non-BO wave functions were used to calculate the 2 relativistic mass velocity, Darwin, and spin-spin interaction
corrections. For the lowest vibrational transition, whose experimental energy is established with high
precision, the calculated and the experimental results differ by only 0.16 cm−1