Photodissociation of XXXX via Selected Vibrational Levels of the B   ((2)E3/2)6s Rydberg State.

@entity11906 @entity1496 @entity5498 @entity17849
UNASSIGNED: We have determined the I (2)P3/2 and (2)P1/2 branching fractions following the photodissociation of @entity11906 ( @entity17849 ) via a number of vibronic bands associated with the B   ((2)E3/2)6s Rydberg state at excitation wavelengths between 201.2 and 192.7 nm. Vacuum ultraviolet light at 118.2 nm was used to ionize both the product @entity1496 atoms and the @entity5498 radical cofragments, and velocity map ion imaging was used to determine the product translational energy distributions and angular distributions. The known relative photoionization cross sections for I (2)P3/2 and (2)P1/2 at 118.2 nm were used to determine the corresponding branching fractions. The results extend our earlier work at 193 nm by Xu et al. (J. Chem. Phys. 2013, 139, 214310), and complement the closely related work of Gonz  lez et al. (J. Chem. Phys. 2011, 135, 021102). We find that for most of the excited vibronic levels of the B   state studied, the I (2)P3/2 branching ratio is small, but nonzero, and that this channel is associated with internally excited @entity5498 radicals. The results are discussed in relation to the recent theoretical results of Alekseyev et al. (J. Chem. Phys. 2011, 134, 044303).
