Dynamics of D3+ slow dissociation induced by intense ultrashort laser pulses

The dissociation of D-3(+) in intense ultrashort laser pulses is investigated using an improved coincidence three-dimensional momentum imaging method that allows clear separation of all fragmentation channels and the determination of the kinetic energy release down to zero. Our results, using 10-fs, 790-nm pulses, suggest that a large peak at low kinetic energy release is associated with the D+ + D-2 dissociation channel of D-3(+). The most likely dissociation pathways leading to two-body breakup of D-3(+) are identified with additional measurements using 25-fs, 790-nm and 40-fs, 395-nm pulses. We also show that the slow D+ + D-2 dissociation dynamics can be manipulated by the pulse duration.