title: Control of branching ratios in the dissociative ionization of deuterium chloride.
abstract: The dissociative ionization of deuterium chloride (DCl) has been investigated by employing femtosecond laser pulses at 805 nm. The product branching ratio D(+)/Cl(+) of the fragments D(+) and Cl(+) is strongly affected by the chirp alpha of the laser pulses. The ratio can be controlled by a factor of 3 ranging from D(+)/Cl(+) = 0.7 at alpha = -800 fs(2) to D(+)/Cl(+) = 1.9 at alpha = +150 fs(2). The observation can be rationalized by a model where negative chirp favors intra-electronic state excitation, and positive chirp favors inter-electronic state excitation in the dissociation of the molecular ion. Complementary experiments on hydrogen chloride (HCl) are discussed.
authors.forename: Hans Georg
authors.initials: HG
authors.lastname: Breunig
authors.forename: Alexandra
authors.initials: A
authors.lastname: Lauer
authors.forename: Karl-Michael
authors.initials: KM
authors.lastname: Weitzel