TITLE

Surface recombination of atoms in a nitrogen afterglow

AUTHOR(S)
Markovic, V. Lj.; Petrovic, Z. Lj.; Pejovic, M. M.
PUB. DATE
June 1994
SOURCE
Journal of Chemical Physics;6/1/1994, Vol. 100 Issue 11, p8514
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The surface recombination of nitrogen atoms in afterglow is studied by the time delay method, accompanied by the macrokinetic diffusive model. The method consists of the measurement of the dependence of the mean value of the breakdown time delay on afterglow period td=f(τ) and fitting of the data by the model that was developed. Excited N2(A 3∑+u) nitrogen molecules formed in the surface-catalyzed recombination on cathode produce secondary electrons. The electrons entering the interelectrode space determine the time delay in electrical breakdown. The time delay method is very efficient in nitrogen atom detection down to a natural radioactivity level. By fitting the calculated curve to the experimental data, we have: (1) shown that the nitrogen atom recombination on the glass container walls is second-order in N while the recombination on the copper electrode is the first order; (2) determined the value of the surface recombination coefficient for molybdenum glass; (3) determined the combined probability of N2(A 3∑+u) metastable formation by recombination at electrode surface and of secondary electron emission. Furthermore, we derive the adsorption isotherm of nitrogen atoms on molybdenum glass, the type of recombination mechanism and the dependence of the activation energy for desorption (or the heat of adsorption) on the fractional coverage.
ACCESSION #
7617383

 

Related Articles

  • Nascent rovibrational distribution of CO(A 1Π) produced in the recombination of CO+2 with electrons. Tsuji, Masaharu; Nakamura, Masafumi; Nishimura, Yukio; Obase, Hiroshi // Journal of Chemical Physics;7/22/1995, Vol. 103 Issue 4, p1413 

    The dissociative electron–ion recombination processes of CO+2(X 2Πg:0,0,0) has been studied by observing the CO(A 1Π–X 1Σ+) emission in the He and Ar afterglows. It was found that the CO(A:v′=0–2) states are formed in the dissociative recombination of...

  • The dissociative recombination rate coefficients of H+3, HN+2, and HCO+. Amano, T. // Journal of Chemical Physics;6/1/1990, Vol. 92 Issue 11, p6492 

    The dissociative recombination rate coefficients for H+3, HN+2, and HCO+ are determined at 110, 210, and 273 K by monitoring the decay of the infrared absorption signals as a function of time. The rate coefficients are 1.8, 7.0, and 3.1 in units of 10-7 cm3 s-1 for H+3, HN+2, and HCO+,...

  • Technique for distinguishing and determining the origin of photon emissions from complex plasmas. Mostefaoui, T. M.; Adams, N. G.; Babcock, L. M. // Review of Scientific Instruments;May2002, Vol. 73 Issue 5, p2044 

    A technique has been developed to separately obtain emission spectra from individual ion-molecule and electron-ion recombination reactions. This involves using a flowing afterglow to create the reaction producing the emissions of interest and pulse modulating a gas into the afterglow that reacts...

  • Measurement of the absolute yield of CO(a[sup 3]pi)+O products in the dissociative recombination.... Skrzypkowski, Miroslaw P.; Gougousi, Theodosia // Journal of Chemical Physics;5/22/1998, Vol. 108 Issue 20, p8400 

    Presents a flowing-afterglow technique for measuring the absolute yield of radiative product state from ion-electron recombination. Details on the dissociative recombination of carbon dioxide ions; Measurement of the absolute branching fraction for CO(a[sup 3]pi) formation; Use of the He+N[sub...

  • Measurements of C3H+3, C5H+3, C6H+6, C7H+5, and C10H+8 dissociative recombination rate coefficients. Abouelaziz, H.; Gomet, J. C.; Pasquerault, D.; Rowe, B. R.; Mitchell, J. B. A. // Journal of Chemical Physics;7/1/1993, Vol. 99 Issue 1, p237 

    The rate coefficients α for the dissociative recombination (DR) of the aromatic cyclic ions C6H6+ and C10H8+ have been measured in a flowing afterglow experiment at room temperature using Xe+ and Kr+ as precursor ions. C+ was also used as a precursor ion and this allowed the DR rate...

  • Experimental and theoretical study of the ion-ion mutual neutralization reactions Ar++SFn- (n=6, 5, and 4). Bopp, Joseph C.; Miller, Thomas M.; Viggiano, Albert A.; Troe, Jürgen // Journal of Chemical Physics;8/21/2008, Vol. 129 Issue 7, p074703 

    The ion-ion mutual neutralization reactions Ar++SFn-→Ar+SFn (n=6, 5, and 4) have been studied in a flowing afterglow-Langmuir probe (FALP) apparatus at 300 K and 1 Torr of He buffer gas. Electron concentrations and product ion fractions were measured, and neutralization rate constants of...

  • Dissociative excitation of CH4 by collisions with helium active species. Tsuji, Masaharu; Kobarai, Kazunari; Obase, Hiroshi; Kouno, Hiroyuki; Nishimura, Yukio // Journal of Chemical Physics;1/1/1991, Vol. 94 Issue 1, p277 

    Dissociative excitation of CH4 by collisions with He(2 3S), He+, and He+2 has been studied by observing CH(A 2Δ–X 2Πr, B 2Σ-–X 2Πr, and C 2Σ+–X 2Πr) and H (Balmer) emissions in the flowing afterglow and beam apparatus. The effect of SF6 addition into the...

  • Dissociative recombination of dications. Seiersen, K.; Heber, O.; Jensen, M. J.; Safvan, C. P.; Andersen, L. H. // Journal of Chemical Physics;7/8/2003, Vol. 119 Issue 2, p839 

    Dissociative recombination (DR) of doubly-charged positive ions has been studied at the heavy ion storage ring ASTRID. Low-energy electrons were scattered on the dication of the N[SUB2] molecule, and the absolute cross section was measured in the energy range of 10[SUP-4] - 50 eV. From the...

  • Dissociative recombination and excitation of N2+: Cross sections and product branching ratios. Peterson, J.R.; Le Padellec, A. // Journal of Chemical Physics;2/1/1998, Vol. 108 Issue 5, p1978 

    Examines the dissociative recombination and excitation of nitrogen. Cross sections and product branching ratios of nitrogen; Use of the ion storage ring CRYRING in the study; Application of a hollow cathode ion source for vibrational excitation lowering.

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics