Photoassociation Reactions H+D⁺ and H⁺+D in Ultrashort Pulse Laser Fields

The photoassociation reactions H+D⁺ and H⁺+D induced by the one- and two-colour laser pulses are theoretically studied. The reactions occur through two channels: (i) H(1S)+D⁺ →HD⁺, and (ii) H⁺+D(1S)→HD⁺. The reaction probability through channel (ii) is higher than through channel (i). The populations of the products H⁺+D and HD⁺ and the ratio of H⁺+D to HD⁺
can be controlled by laser pulses. The two-colour laser pulses can more
efficiently lower the dissociation probability and therefore enhance the
yield ratio of the product HD⁺.