Accession Number : ADA254291


Title :   State-Resolved Reaction Dynamics


Descriptive Note : Final technical rept. 1 Dec 88-30 Nov 91,


Corporate Author : STANFORD UNIV CA DEPT OF CHEMISTRY


Personal Author(s) : Zare, Richard N


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a254291.pdf


Report Date : 27 Jul 1992


Pagination or Media Count : 23


Abstract : This research effort is comprised of two groups of experiments. The first group measures and characterizes the electron ejected in a photoionization event. The second group is concerned with understanding the role of energy in affecting the outcome of ion-molecule reactions. High resolution, angle-resolved photoelectron spectroscopy was carried out following resonance enhanced multiphoton ionization (REMPI) of nitric oxide. These measurements have led to a complete description of this photoionization event. Photoelectron spectroscopy was also used to measure the degree of vibrational state-selectivity resulting from REMPI of NH3 and HBr/DBr. Additionally, the rotational state distributions resulting from HBr/DBr/HCl REMPI were measured using LIF. These state distributions were used in the study of the near resonant charge transfer reaction of DBr+ + HBr, where the reagent ion was state-selectively prepared with REMPI and the product state distributions were monitored with LIF. Vibrationally state-selected ammonia ions generated by REMPI were used to investigate the effect of kinetic and vibrational energy in determining the product formation tendencies of the reaction NH 3++ ND3. Measurement of the product cross sections has shown the differing effects of vibrational and translational excitation on dynamics of this ion-molecule system.


Descriptors :   *CHARGE TRANSFER , *PHOTOIONIZATION , *PHOTOELECTRONS , *ION MOLECULE INTERACTIONS , ANGLES , IONS , MEASUREMENT , VIBRATION , FLUORESCENCE , SPECTROSCOPY , LASER INDUCED FLUORESCENCE , DISTRIBUTION , DYNAMICS , MOLECULES , EXCITATION , ENERGY , RESOLUTION , LASERS , HIGH RESOLUTION , AMMONIA , ELECTRONS , TRANSFER , KINETICS , OXIDES , RESONANCE , CROSS SECTIONS , IONIZATION


Subject Categories : Physical Chemistry
      Atomic and Molecular Physics and Spectroscopy
      Nuclear Physics & Elementary Particle Physics


Distribution Statement : APPROVED FOR PUBLIC RELEASE