“…Table 2 list the interaction energies of the He-K 2 + ( 2 S + g ) complex along the minimum energy path for different angular orientations of the He atom computed by the present MRCI+Q, RKHS PES and previously reported studies. 46,47 One can see that RKHS PES describes the He-K 2 + interaction in excellent agreement with the MRCI+Q data, with an overall average difference of 0.04 cm À1 . Also comparison with the previously reported values 46,47 shows some significant differences along all angular orientations.…”