TITLE

Optogalvanic transients in a neon radio frequency discharge

AUTHOR(S)
Kumar, D.; Zinn, R. R.; McGlynn, S. P.
PUB. DATE
August 1994
SOURCE
Journal of Chemical Physics;8/1/1994, Vol. 101 Issue 3, p1959
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The time dependence of the optogalvanic signals induced by 1sj→2pk (Paschen notation) pulsed laser excitations of neon in a low power ∼30 MHz radio frequency (rf) discharge at ∼5 Torr has been investigated. The method of Kumar and McGlynn [Chem. Phys. Lett. 176, 536 (1991)] has been improved and is used to separate the temporal profiles of the optogalvanic signals into two components: one attributable to ionization rate changes and the other to acoustic effects. This separation simplifies the identification of the kinetic processes which produce optogalvanic signals. Selective laser excitation of 2pk states, ones which possess quite different decay branching ratios to the metastable and nonmetastable 1sj states, reveals time dependencies due to unique perturbations of specific 1sj populations. No dimer mediated nor, indeed, any effects associable with 2pk state populations contribute to the profiles. Competitive processes which increase or decrease the ionization rates are identified at t≥1 μs. The extensive broadening of the acoustic and ionization components is caused by radiation trapping of 1s2→1S0 and 1s4→1S0 photons.
ACCESSION #
7610119

 

Related Articles

  • Ionization dynamics: Unexpected electrons. Märk, Tilmann D.; Scheier, Paul // Nature Physics;Feb2010, Vol. 6 Issue 2, p82 

    In this article, the author comments on two studies published within this issue of the journal by T. Jahnke and M. Mucke concerning identification and occurrence of intermolecular coulombic decay (ICD). He stated that the two studies demonstrated that dimers and clusters of water subjected to...

  • Electronic spectra of NeXe, ArXe, and KrXe using resonantly enhanced multiphoton ionization. Pratt, S. T.; Dehmer, P. M.; Dehmer, J. L. // Journal of Chemical Physics;12/1/1985, Vol. 83 Issue 11, p5380 

    Two photon resonant, three photon ionization spectra of the heteronuclear rare gas dimers NeXe, ArXe, and KrXe were measured in the energy region of the Xe* 5d and 6p levels. A number of new bands corresponding to two photon transitions from the electronic ground state to bound vibrational...

  • Resonant two photon ionization spectroscopy of the molecules V2, VNb, and Nb2. James, Andrew M.; Kowalczyk, Pawel; Langlois, Etienne; Campbell, Margot D.; Ogawa, Ayano; Simard, Benoit // Journal of Chemical Physics;9/15/1994, Vol. 101 Issue 6, p4485 

    Resonant two photon ionization (R2PI) spectroscopy was used to obtain detailed spectroscopic information on the neutral and cation ground states of the jet-cooled molecules V2, VNb, and Nb2. By recording photoionization efficiency (PIE) spectra, their adiabatic ionization potentials were...

  • Fragmentation of NH3 dimers by electron impact ionization. Buck, U.; Meyer, H.; Nelson, D.; Fraser, G.; Klemperer, W. // Journal of Chemical Physics;3/1/1988, Vol. 88 Issue 5, p3028 

    The fragmentation of ammonia dimers by electron impact ionization is investigated by preselecting the neutral species using scattering and spectroscopic methods. In the first experiment, the measured angular and velocity dependence of the ammonia cluster scattered from a helium beam is used to...

  • Mass analyzed threshold ionization spectroscopy of N-methylaniline, N-ethylaniline, and N,N-dimethylaniline cations: Influence of N-alkyl substitution on the ionization energy and molecular vibration. Wu, Rong Hu; Lin, Jung Lee; Lin, Jieli; Yang, Shih Chang; Tzeng, Wen Bih // Journal of Chemical Physics;3/15/2003, Vol. 118 Issue 11, p4929 

    We have applied two-color resonant two-photon mass analyzed threshold ionization spectroscopy to investigate some ionic properties of N-alkylanilines. The respective adiabatic ionization energies of N-methylaniline (NMA), N-ethylaniline (NEA), and N,N-dimethylaniline (DMA) are determined to be...

  • Determination of NO (v=0–7) product distribution from the N(4S)+O2 reaction using two-photon ionization. Winkler, I.; Stachnik, R. A.; Steinfeld, J. I.; Miller, S. M. // Journal of Chemical Physics;7/15/1986, Vol. 85 Issue 2, p890 

    The product vibrational state distribution for the reaction N(4S)+O2→NO(2Π,v)+O has been measured using saturated multiphoton ionization spectroscopy to determine NO electronic ground-state distributions. The fraction of the reaction exothermicity appearing in product vibration is < f...

  • Gerade electronic states of Xe2 observed using resonantly enhanced multiphoton ionization. Dehmer, P. M.; Pratt, S. T.; Dehmer, J. L. // Journal of Chemical Physics;7/1/1986, Vol. 85 Issue 1, p13 

    The two photon resonant, three photon ionization spectrum of the rare gas dimer Xe2 was determined in the energy region of the Xe* 5d and 6p states. A number of new band systems were observed that arise from two photon transitions from the ground state to bound vibrational levels of excited...

  • Two-Photon Excitation of Odd-Parity States from the Ground State of the Ca Atom. Bondar’, I. I.; Suran, V. V. // Optics & Spectroscopy;Dec2002, Vol. 93 Issue 6, p818 

    The two-photon transitions forbidden in the dipole approximation by the parity selection rules were observed experimentally, for the first time, upon multiphoton ionization of atoms. © 2002 MAIK “Nauka / Interperiodica”.

  • Vibrationally resolved cross sections for single-photon ionization of LiH. Lundsgaard, Morten F. V.; Rudolph, H. // Journal of Chemical Physics;10/15/1999, Vol. 111 Issue 15, p6724 

    Focuses on ab initio studies of single-photon ionization of LiH. Potential curves and their vibrational structures; Theoretical methods used to calculate the photoionization cross section; Function of the internuclear distance and the kinetic energy of the electron; Iterative Schwinger approach...

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