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Title: Communication: First observation of ground state I({sup 2}P{sub 3/2}) atoms from the CH{sub 3}I photodissociation in the B-band

Abstract

The photodissociation of CH{sub 3}I in the second absorption band (the B-band) has been studied at the wavelength 199.11 nm, coincident with the 3{sub 0}{sup 1} {sup 3}R{sub 1}(E)(leftarrow)X(tilde sign)({sup 1}A{sub 1}) CH{sub 3}I vibronic transition, using a combination of slice imaging and resonance enhanced multiphoton ionization detection of the CH{sub 3} fragment. The kinetic energy and angular distributions of the recoiling CH{sub 3} fragment confirm a major predissociation dynamics channel as a result of the interaction between the bound {sup 3}R{sub 1} Rydberg state and the repulsive {sup 3}A{sub 1}(E) state - ascribed to the A-band - yielding CH{sub 3} fragments in correlation with spin-orbit excited I*({sup 2}P{sub 1/2}) atoms. In addition, first evidence of a non-negligible population of ground state I({sup 2}P{sub 3/2}) atoms in the CH{sub 3} fragment slice images, suggests a secondary predissociation mechanism via interaction between the {sup 3}R{sub 1} Rydberg state and the repulsive A-band {sup 1}Q{sub 1} state.

Authors:
; ; ;  [1]
  1. Departamento de Quimica Fisica I, Facultad de Ciencias Quimicas, Universidad Complutense de Madrid, 28040 Madrid (Spain)
Publication Date:
OSTI Identifier:
22038641
Resource Type:
Journal Article
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 135; Journal Issue: 2; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-9606
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION; ANGULAR DISTRIBUTION; GROUND STATES; INTERACTIONS; KINETIC ENERGY; METHYL IODIDE; MULTI-PHOTON PROCESSES; PHOTOLYSIS; PREDISSOCIATION; RYDBERG STATES

Citation Formats

Gonzalez, M. G., Rodriguez, J. D., Rubio-Lago, L., and Banares, L.. Communication: First observation of ground state I({sup 2}P{sub 3/2}) atoms from the CH{sub 3}I photodissociation in the B-band. United States: N. p., 2011. Web. doi:10.1063/1.3613656.
Gonzalez, M. G., Rodriguez, J. D., Rubio-Lago, L., & Banares, L.. Communication: First observation of ground state I({sup 2}P{sub 3/2}) atoms from the CH{sub 3}I photodissociation in the B-band. United States. doi:10.1063/1.3613656.
Gonzalez, M. G., Rodriguez, J. D., Rubio-Lago, L., and Banares, L.. Thu . "Communication: First observation of ground state I({sup 2}P{sub 3/2}) atoms from the CH{sub 3}I photodissociation in the B-band". United States. doi:10.1063/1.3613656.
@article{osti_22038641,
title = {Communication: First observation of ground state I({sup 2}P{sub 3/2}) atoms from the CH{sub 3}I photodissociation in the B-band},
author = {Gonzalez, M. G. and Rodriguez, J. D. and Rubio-Lago, L. and Banares, L.},
abstractNote = {The photodissociation of CH{sub 3}I in the second absorption band (the B-band) has been studied at the wavelength 199.11 nm, coincident with the 3{sub 0}{sup 1} {sup 3}R{sub 1}(E)(leftarrow)X(tilde sign)({sup 1}A{sub 1}) CH{sub 3}I vibronic transition, using a combination of slice imaging and resonance enhanced multiphoton ionization detection of the CH{sub 3} fragment. The kinetic energy and angular distributions of the recoiling CH{sub 3} fragment confirm a major predissociation dynamics channel as a result of the interaction between the bound {sup 3}R{sub 1} Rydberg state and the repulsive {sup 3}A{sub 1}(E) state - ascribed to the A-band - yielding CH{sub 3} fragments in correlation with spin-orbit excited I*({sup 2}P{sub 1/2}) atoms. In addition, first evidence of a non-negligible population of ground state I({sup 2}P{sub 3/2}) atoms in the CH{sub 3} fragment slice images, suggests a secondary predissociation mechanism via interaction between the {sup 3}R{sub 1} Rydberg state and the repulsive A-band {sup 1}Q{sub 1} state.},
doi = {10.1063/1.3613656},
journal = {Journal of Chemical Physics},
issn = {0021-9606},
number = 2,
volume = 135,
place = {United States},
year = {2011},
month = {7}
}