Determination of charge, atom, momentum and energy transfer rate coefficients near 5 K.

Persistent Link:
http://hdl.handle.net/10150/186873
Title:
Determination of charge, atom, momentum and energy transfer rate coefficients near 5 K.
Author:
Latimer, Darin Rae.
Issue Date:
1994
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
This dissertation presents the results of several investigations into nonadiabatic reaction dynamics in the 0.5 to 10 K temperature regime. The free jet flow reactor technique for production of very low local temperatures and the method for extraction of reaction rate coefficients in this unique environment is reviewed. Ion-neutral reactions which exhibit nonadiabatic behavior are initiated by state selective resonantly enhanced multiphoton ionization and the reactions are subsequently studied using time of flight mass spectrometric detection. The importance of long lived collision complexes in nonadiabatic ion-neutral reactions is reemphasized. Collisional electronic spin orbit relaxation of Xe⁺(²P(½) is shown to be very inefficient for a wide variety of collision partners. A sequential two electron charge transfer mechanism is proposed to account for the high efficiency of the fine structure relaxation by methane and nitrous oxide both of which have open charge transfer channels. The results of fine structure state specific reactions of Ar⁺(²P(J)) with H₂, D₂, HD, CH₄ and CD₄ are presented as examples of nonadiabatic atom and electron transfer reactions. Preliminary results on vibrational-rotational relaxation of neutrals in the free jet at very low temperatures using a pump-probe technique are presented.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Chemistry, Physical and theoretical.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Chemistry; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Smith, Mark

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleDetermination of charge, atom, momentum and energy transfer rate coefficients near 5 K.en_US
dc.creatorLatimer, Darin Rae.en_US
dc.contributor.authorLatimer, Darin Rae.en_US
dc.date.issued1994en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThis dissertation presents the results of several investigations into nonadiabatic reaction dynamics in the 0.5 to 10 K temperature regime. The free jet flow reactor technique for production of very low local temperatures and the method for extraction of reaction rate coefficients in this unique environment is reviewed. Ion-neutral reactions which exhibit nonadiabatic behavior are initiated by state selective resonantly enhanced multiphoton ionization and the reactions are subsequently studied using time of flight mass spectrometric detection. The importance of long lived collision complexes in nonadiabatic ion-neutral reactions is reemphasized. Collisional electronic spin orbit relaxation of Xe⁺(²P(½) is shown to be very inefficient for a wide variety of collision partners. A sequential two electron charge transfer mechanism is proposed to account for the high efficiency of the fine structure relaxation by methane and nitrous oxide both of which have open charge transfer channels. The results of fine structure state specific reactions of Ar⁺(²P(J)) with H₂, D₂, HD, CH₄ and CD₄ are presented as examples of nonadiabatic atom and electron transfer reactions. Preliminary results on vibrational-rotational relaxation of neutrals in the free jet at very low temperatures using a pump-probe technique are presented.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectChemistry, Physical and theoretical.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineChemistryen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairSmith, Marken_US
dc.contributor.committeememberSalzman, Ronen_US
dc.contributor.committeememberKukolich, Steveen_US
dc.contributor.committeememberBuckner, Steveen_US
dc.contributor.committeememberEnemark, Johnen_US
dc.identifier.proquest9507004en_US
dc.identifier.oclc704273669en_US
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