A velocity-map imaging study of the photodissociation of the methyl iodide cation

The photodissociation dynamics of the methyl iodide cation has been studied using the velocity map imaging technique. A first laser pulse is used to ionize methyl iodide via a (2 + 1) REMPI scheme through the 5pp - 6p Rydberg state two-photon transition. The produced CH3I+(X) ions are subsequently e...

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Detalles Bibliográficos
Autores: Marggi Poullaín, Sonia, Chicharro Vacas, David, Rubio-Lago, Luis, González-Vázquez, Jesús, Bañares Morcillo, Luis
Tipo de recurso: artículo
Fecha de publicación:2017
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/95504
Acceso en línea:https://hdl.handle.net/20.500.14352/95504
Access Level:acceso abierto
Palabra clave:544
Ciencias
2206 Física Molecular
2206.07-1 Espectroscopia láser
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repository_id_str
spelling A velocity-map imaging study of the photodissociation of the methyl iodide cationMarggi Poullaín, SoniaChicharro Vacas, DavidRubio-Lago, LuisGonzález-Vázquez, JesúsBañares Morcillo, Luis544Ciencias2206 Física Molecular2206.07-1 Espectroscopia láserThe photodissociation dynamics of the methyl iodide cation has been studied using the velocity map imaging technique. A first laser pulse is used to ionize methyl iodide via a (2 + 1) REMPI scheme through the 5pp - 6p Rydberg state two-photon transition. The produced CH3I+(X) ions are subsequently excited at several wavelengths between 242 and 260 nm. The reported translational energy distributions for the methyl and iodine ions present a Boltzmann-type unstructured distribution at low excitation energies as well as a recoiled narrow structure at higher excitation energies highlighting two different dissociation processes. High level ab initio calculations have been performed in order to obtain a deeper understanding of the photodissociation dynamics of the CH3I+ ion. Direct dissociation on a repulsive state from the manifold of states representing the B˜ excited state leads to CH3+(X) + I*(2P1/2), while the CH3 + I+(3P2) channel is populated through an avoided crossing outside the Franck–Condon region. In contrast, an indirect process involving the transfer of energy from highly excited electronic states to the ground state of the ion is responsible for the observed Boltzmann-type distributions.Royal Society of ChemistryUniversidad Complutense de Madrid20172017-01-0120172017-01-01journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/95504reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/955042026-06-02T12:44:21Z
dc.title.none.fl_str_mv A velocity-map imaging study of the photodissociation of the methyl iodide cation
title A velocity-map imaging study of the photodissociation of the methyl iodide cation
spellingShingle A velocity-map imaging study of the photodissociation of the methyl iodide cation
Marggi Poullaín, Sonia
544
Ciencias
2206 Física Molecular
2206.07-1 Espectroscopia láser
title_short A velocity-map imaging study of the photodissociation of the methyl iodide cation
title_full A velocity-map imaging study of the photodissociation of the methyl iodide cation
title_fullStr A velocity-map imaging study of the photodissociation of the methyl iodide cation
title_full_unstemmed A velocity-map imaging study of the photodissociation of the methyl iodide cation
title_sort A velocity-map imaging study of the photodissociation of the methyl iodide cation
dc.creator.none.fl_str_mv Marggi Poullaín, Sonia
Chicharro Vacas, David
Rubio-Lago, Luis
González-Vázquez, Jesús
Bañares Morcillo, Luis
author Marggi Poullaín, Sonia
author_facet Marggi Poullaín, Sonia
Chicharro Vacas, David
Rubio-Lago, Luis
González-Vázquez, Jesús
Bañares Morcillo, Luis
author_role author
author2 Chicharro Vacas, David
Rubio-Lago, Luis
González-Vázquez, Jesús
Bañares Morcillo, Luis
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 544
Ciencias
2206 Física Molecular
2206.07-1 Espectroscopia láser
topic 544
Ciencias
2206 Física Molecular
2206.07-1 Espectroscopia láser
description The photodissociation dynamics of the methyl iodide cation has been studied using the velocity map imaging technique. A first laser pulse is used to ionize methyl iodide via a (2 + 1) REMPI scheme through the 5pp - 6p Rydberg state two-photon transition. The produced CH3I+(X) ions are subsequently excited at several wavelengths between 242 and 260 nm. The reported translational energy distributions for the methyl and iodine ions present a Boltzmann-type unstructured distribution at low excitation energies as well as a recoiled narrow structure at higher excitation energies highlighting two different dissociation processes. High level ab initio calculations have been performed in order to obtain a deeper understanding of the photodissociation dynamics of the CH3I+ ion. Direct dissociation on a repulsive state from the manifold of states representing the B˜ excited state leads to CH3+(X) + I*(2P1/2), while the CH3 + I+(3P2) channel is populated through an avoided crossing outside the Franck–Condon region. In contrast, an indirect process involving the transfer of energy from highly excited electronic states to the ground state of the ion is responsible for the observed Boltzmann-type distributions.
publishDate 2017
dc.date.none.fl_str_mv 2017
2017-01-01
2017
2017-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/95504
url https://hdl.handle.net/20.500.14352/95504
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Royal Society of Chemistry
publisher.none.fl_str_mv Royal Society of Chemistry
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.298079

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