TITLE

Nonlinear resonance and correlated binary collisions in the vibrational predissociation dynamics of I2(B,v)–Ar13 clusters

AUTHOR(S)
Borrmann, Angela; Li, Zhiming; Martens, Craig C.
PUB. DATE
June 1993
SOURCE
Journal of Chemical Physics;6/1/1993, Vol. 98 Issue 11, p8514
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The vibrational predissociation dynamics of the van der Waals cluster I2(B,v)–Ar13 are studied theoretically from a classical mechanical perspective. The focus is on the ejection of the first Ar atom from the excited cluster. This process is found to occur by two competing mechanisms (1) evaporation of a cluster atom induced by the slow vibrational relaxation of the I2 impurity, and (2) direct ejection of a geometrically favored Ar atom by two or more impulsive collisions with the vibrating I2. In contrast with the picture of independent binary collisions, the multiple argon–iodine interactions leading to successful direct dissociation are correlated in time. The relative propensity of the direct channel is a highly structured function of v, the initial vibrational level of the I2. This behavior results from the energy-dependent frequencies of motion of the diatomic and the localized Ar cluster mode, and is a novel example of a nonlinear resonance between ‘‘system’’ and ‘‘bath’’ degrees of freedom.
ACCESSION #
7617366

 

Related Articles

  • Dynamic surface force measurement. I. van der Waals collisions Attard, Phil; Schulz, Jamie C.; Rutland, Mark W. // Review of Scientific Instruments;Nov98, Vol. 69 Issue 11, p3852 

    Part I. Measures the dynamic surface force using the van der Waals collisions. Effect of cantilever deflection on speed and magnitude of surface force; Details on the collision-induced elastic vibrations in the solids; Factors attributing the surface separation at high accelerations.

  • The effect of slight deformation on droplet coalescence in linear flows. Rother, Michael A.; Davis, Robert H. // Physics of Fluids;May2001, Vol. 13 Issue 5, p1178 

    A trajectory analysis is used to determine the effect of small deformations and van der Waals attractions on the collision efficiency of two non-Brownian drops freely suspended in a linear flow at small Reynolds number. Simple shear flow and uniaxial compressional and extensional flow are...

  • Half-collision studies: Action spectroscopy of electronic energy transfer within the Cd·CH4 van der Waals complex. Wallace, Ingvar; Breckenridge, W. H. // Journal of Chemical Physics;8/15/1992, Vol. 97 Issue 4, p2318 

    The technique of action spectroscopy has been used to characterize the ground state and excited states of the Cd–CH4 van der Waals complex and to study ‘‘half-collision’’ electronic energy transfer processes within the complex. By tuning one laser pulse in the...

  • Dipoles induced by van der Waals interactions during collisions of atoms with heteroatoms or with centrosymmetric linear molecules. Bohr, J. E.; Hunt, K. L. C. // Journal of Chemical Physics;5/15/1987, Vol. 86 Issue 10, p5441 

    Using a reaction field model, we have derived symmetry-adapted expressions for the van der Waals dipoles of atom–heteroatom and atom-D∞h molecule pairs, with nonoverlapping charge distributions.The leading van der Waals contributions vary as R-7 in the intermolecular separation R and...

  • Collision-induced intramolecular energy flow and fragmentation in van der Waals complexes: Atom+tetramer collisions. Shin, H. K. // Journal of Chemical Physics;6/15/1988, Vol. 88 Issue 12, p7522 

    Intramolecular energy flow and fragmentation processes in a linear van der Waals complex consisting of four molecular units undergoing collision with an incident atom are studied by solving Hamilton’s equations of motion for positions and momenta of all molecular units and van der Waals...

  • Virial theorem and the two molecule interaction potential. Galibin, N. // High Temperature;Sep2012, Vol. 50 Issue 5, p596 

    A method for determining the parameters of the two-molecule interaction potential is shown by the example of the Mie potential or the four-parameter Lennard-Jones potential (GLJ). The application of the virial theorem with respect to the Mie potential allows one to determine exponents at the...

  • Potential energy surface for H2O(3A″) from accurate ab initio data with inclusion of long-range interactions. Brandão, João; Mogo, César; Silva, Bruno C. // Journal of Chemical Physics;11/8/2004, Vol. 121 Issue 18, p8861 

    A new potential energy surface for the O(3P)+H2 system in the lowest 3A″ state is built using ab initio data calculated by Rogers et al. [J. Phys. Chem. A 104, 2308 (2000)] and the double many-body expansion formalism. It incorporates a semiempirical model of long-range interactions, which...

  • Calculations of fine-structure resolved collisional rate coefficients for the NH(X3Σ-)-He system. Toboła, Robert; Dumouchel, Fabien; Kłos, Jacek; Lique, François // Journal of Chemical Physics;1/14/2011, Vol. 134 Issue 2, p024305 

    We present fine-structure-resolved collisional rate coefficients for the NH(X3Σ-)-He van der Waals complex. The calculations are based on the state-of-the-art potential energy surface [Cybulski et al., J. Chem. Phys. 122, 094307 (2005)]. Close-coupling calculations of the collisional...

  • An analysis of head-on droplet collision with large deformation in gaseous medium. Zhang, Peng; Law, Chung K. // Physics of Fluids;Apr2011, Vol. 23 Issue 4, p042102 

    A theoretical analysis was performed for the head-on collision of two identical droplets in a gaseous environment, with the attendant bouncing and coalescence outcomes, for situations in which the extent of droplet deformation upon collision is comparable to the original droplet radius,...

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