Surface residence time measurements of transient methyl radicals

K. A. Briggman, Peter C Stair, E. Weitz

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We present the first measurement of the thermal desorption kinetics of methyl radicals. Neutral methyl radicals are photochemically produced within a methyl iodide film condensed on MgO(100). A substantial fraction become trapped through inelastic collisions with the film and thermalize to the film temperature prior to desorption. Novel residence time measurements are made by comparing neutral and ion flight times in a time-of-flight spectrometer. An Arrhenius analysis of methyl radical residence times provides a desorption barrier of 2.5±0.5kcalmol-1 and a pre-factor of 1010±1s-1.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalChemical Physics Letters
Volume334
Issue number1-3
DOIs
Publication statusPublished - Feb 2 2001

Fingerprint

Time measurement
desorption
time measurement
Desorption
flight time
time of flight spectrometers
Thermal desorption
inelastic collisions
iodides
Spectrometers
Ions
Kinetics
kinetics
methyl radical
ions
Temperature
temperature

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

Cite this

Surface residence time measurements of transient methyl radicals. / Briggman, K. A.; Stair, Peter C; Weitz, E.

In: Chemical Physics Letters, Vol. 334, No. 1-3, 02.02.2001, p. 1-6.

Research output: Contribution to journalArticle

Briggman, K. A. ; Stair, Peter C ; Weitz, E. / Surface residence time measurements of transient methyl radicals. In: Chemical Physics Letters. 2001 ; Vol. 334, No. 1-3. pp. 1-6.
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