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Title Dissociation of benzylamine ions following infrared multiple photon absorption, electron impact ionization, and UV multiphoton ionization
Creator/Author Catanzarite, J.H. ; Haas, Y. ; Reisler, H. ; Wittig, C.
Publication Date1983 May 01
OSTI IdentifierOSTI ID: 6238701
Other Number(s)CODEN: JCPSA
Resource TypeJournal Article
Resource RelationJ. Chem. Phys. ; Vol/Issue: 78:9
Research OrgDepartments of Electrical Engineering, Physics, and Chemistry, University of Southern California, Los Angeles, California 90089-0484
Subject640304 -- Atomic, Molecular & Chemical Physics-- Collision Phenomena; ;AROMATICS-- ELECTRON-ION COLLISIONS;AROMATICS-- PHOTOIONIZATION;ELECTRON-ION COLLISIONS-- DISSOCIATION;ELECTRON-ION COLLISIONS-- IONIZATION;ORGANIC NITROGEN COMPOUNDS-- ELECTRON-ION COLLISIONS;ORGANIC NITROGEN COMPOUNDS-- PHOTOIONIZATION; ABSORPTION;INFRARED RADIATION;MOLECULAR IONS;ULTRAVIOLET RADIATION
Related SubjectCHARGED PARTICLES;COLLISIONS;ELECTROMAGNETIC RADIATION;ELECTRON COLLISIONS;ION COLLISIONS;IONIZATION;IONS;ORGANIC COMPOUNDS;RADIATIONS
Description/Abstract The dissociation of benzylamine ions following (i) electron impact (EI) ionization, (ii) multiphoton ionization (MPI) at 266 nm, and (iii) infrared multiple photon absorption (IRMPA) at 9.26 ..mu..m is reported.^In the EI and MPI experiments, three competitive dissociation pathways are observed.^In the IRMPA experiments, benzylamine ions prepared by MPI at low fluences are fragmented very efficiently following irradiation with the focused output from a pulsed CO/sub 2/ laser.^However, in contrast to the EI and MPI results, the IRMPD experiments reveal only a single, lowest energy, dissociation pathway and the fragmentation pattern is consistent with a sequential mechanism in which daughter ions continue to absorb the IR radiation and dissociate.^The differences are explained by the different natures of the excitation processes: in IRMPA, the relatively slow up-pumping rate and the long rise time of the CO/sub 2/ laser pulse restrict the levels of excitation in the dissociating parent ions and favor sequential processes along the lowest energy decomposition pathways.
Country of PublicationUnited States
LanguageEnglish
FormatPages: 5506-5512
System Entry Date2001 May 13

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