ISOTOPE EFFECT OF QUANTUM-MECHANICAL COLLINEAR HE-2(+) REACTION AT ENERGIES BELOW AND ABOVE THE DISSOCIATION THRESHOLD(H)

Accurate time-independent quantum mechanical calculations have been ca rried out for collinear He + XH(+), HX(+), X(2)(+) (X = Mu, H, D, T) c ollisions on a realistic potential-energy surface at total energies of 1-6 eV. The present paper provides an entire view of the reaction fea tures over a wide range of energies both below and above the dissociat ion threshold. At energies below the dissociation threshold, the reson ance structure seen in the exchange reaction is studied for the isotop e combinations mentioned above. At energies above the dissociation thr eshold, the effect of isotope variations on the competition between th e exchange and dissociation reactions is discussed.