TITLE

Electronic and vibrational predissociation in ArI[sub 2] photodissociation dynamics

AUTHOR(S)
Lepetit, Bruno; Roncero, Octavio; Buchachenko, Alexei A.; Halberstadt, Nadine
PUB. DATE
May 2002
SOURCE
Journal of Chemical Physics;5/15/2002, Vol. 116 Issue 19, p8367
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Quantum dynamical calculations on the photodissociation process: ArI[sub 2](X) + h v→Ar+ I[sub 2](B) or Ar+ I+I have been performed using diatomics-in-molecule semiempirical potential energy surfaces in the spectral region of the I[sub 2](B,v = 15-25)←I[sub 2](X,v = 0) transition. The B state responsible for vibrational predissociation producing Ar+I[sub 2](B) is coupled to four dissociative states inducing electronic predissociation to Ar+I(²P[sub 3/2])+I(²P[sub 3/2]). These dissociative states correlate to the a(lg), a′(0g[sup +]), B″(1u), l(2g) electronic states of I[sub 2]. Both linear and perpendicular initial ArI[sub 2](X) isomers are considered. For the linear isomer, only the a′ state has non-negligible effect on photodissociation dynamics, although total photon absorption cross sections are not significantly modified when coupling to a′ is taken into account, partial cross sections corresponding to vibrational predissociation are smaller. For the perpendicular isomer, resonance decay rates are increased, mainly by the coupling to a′ (0g[sup +]), 1 (2g), and a(1g) states. Decay rates oscillate as a function of the vibrational excitation of I[sub 2] (B) but the main source of oscillation is the intramolecular vibrational energy redistribution which occurs in vibrational predissociation, rather than Franck-Condon oscillations in electronic predissociation.
ACCESSION #
6579185

 

Related Articles

  • Charge transfer and radiative dissociation dynamics in fluorine-doped solid krypton and argon. Kunttu, H.; Feld, J.; Alimi, R.; Becker, A.; Apkarian, V. A. // Journal of Chemical Physics;4/15/1990, Vol. 92 Issue 8, p4856 

    The photodissociation of F2 in crystalline Kr is subject to only a minor cage effect—quantum yield of 0.5 at 308 nm, at T=12 K. Two-photon-induced harpooning in the same system leads to dissociation with near unit quantum efficiency; it is shown that this absorption is coherent with a...

  • Two-photon photodissociation dynamics of H2O via the D electronic state. Yuan, Kaijun; Cheng, Lina; Yuan Cheng; Qing Guo; Dongxu Dai; Xueming Yang // Journal of Chemical Physics;8/21/2009, Vol. 131 Issue 7, p074301 

    Photodissociation dynamics of H2O via the D state by two-photon absorption have been investigated using the H-atom Rydberg tagging time-of-flight technique. The action spectrum of the D←X transition band has been measured. The predissociation lifetime of the D state is determined to be...

  • Channel switching effect in photodissociating N2O+ ion at 312.5 nm. Haifeng Xu; Ying Guo; Qifeng Li; Yong Shi; Shilin Liu; Xingxiao Ma // Journal of Chemical Physics;8/15/2004, Vol. 121 Issue 7, p3069 

    A experimental observation is presented on the N2O+ photodissociation process, which exhibits a complete channel switching effect in a narrow energy range. The N2O+ ions, prepared at the X 2Π (000) state by (3+1) multiphoton ionization of neutral N2O molecules at 360.6 nm, were excited to...

  • Photodissociation of (SO2)m(H2O)n clusters employing femtosecond pump-probe spectroscopy. Knappenberger, K. L.; Castleman Jr., A. W. // Journal of Chemical Physics;4/15/2005, Vol. 122 Issue 15, p154306 

    A femtosecond pump-probe technique was employed to study the photodissociation dynamics of (SO2)m(H2O)n clusters in real time for clusters, where m=1, 2 and n as large as 11. The pump (excitation) step occurs through a multiphoton process which populates the dissociative E state as well as a...

  • Shaking light from the void. Davies, Paul // Nature;8/29/1996, Vol. 382 Issue 6594, p761 

    Discusses an idea for detection of moving-mirror radiation in the field of quantum electrodynamics. The idea suggested by Astrid Lambrecht, Marc-Thierry Jaekel and Serge Reynaud; Their use of a pair of mirrors in a system similar to that used in the Casimir effect; The crucial advantage of...

  • Laser Spectroscopy and Cavity QED With Nanometric Gas Cells. Ducloy, Martial // AIP Conference Proceedings;2007, Vol. 888 Issue 1, p409 

    A correction to the article "Laser spectroscopy and Cavity QED With Nanometric Gas Cells," which appeared in the March 17, 2005 issue, is presented.

  • Photonic crystal microcavities for cavity quantum electrodynamics with a single quantum dot. Vucˇkovic, Jelena; Yamamoto, Yoshihisa // Applied Physics Letters;4/14/2003, Vol. 82 Issue 15, p2374 

    We propose a planar photonic crystal microcavity design specially tailored for cavity quantum electrodynamics with a single quantum dot emitter embedded in semiconductor. With quality factor up to 45 000, mode volume smaller than a cubic optical wavelength in material, and electric field maximum...

  • Quantum Electrodynamic Calculation of Interelectron Interaction for He-like and Li-like Multiply Charged Ions. Andreev, O. Yu.; Labzovskii, L. N. // Optics & Spectroscopy;Aug2000, Vol. 89 Issue 2, p161 

    Exact quantum-electrodynamic calculations of the interelectron interaction corrections are performed for the 1s[sub �]2s[sub �]�S[sub 0], 1s[sub �]2p[sub �]�P[sub 0], and 1s[sub �]2s[sub �]�S[sub 1] configurations in He-like ions and for the (1s[sub...

  • Books.  // Physics Today;Aug92, Vol. 45 Issue 8, Part 1 p68 

    Reviews the book `Quantum Electrodynamics,' edited by T. Kinoshita.

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

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

Try another library?
Sign out of this library

Other Topics