Energy transfer, in collisions

Kreutz T G and Flynn G W 1990 Analysis of translational, rotational, and vibrational energy transfer in collisions between COj and hot hydrogen atoms the three dimensional breathing ellipse model J. Chem. Phys. 93 452-65... 

Since in general the probability that vibrational and rotational energy will be lost by spontaneous infrared radiation is low [4], deactivation usually proceeds via collisions. Thus, it is important to have detailed information on intermolecular force laws and to have the necessary theoretical tools for the prediction of energy transfer in collisions. 

A. Bjerre and E.E.Nikitin, Energy transfer in collisions of excited sodium atom with nitrogen molecule, Chem. Phys. Lett. 1,179 (1967)... 

E.E.Nikitin, S.Ya.Umanskii. and D.V.Shalashilin, Vibration-to-rotation energy transfer in collisions of hydrogen halide molecules with noble gas atoms. Khim. Fiz. 8. 1011 (1989). 

Bemshtein, V. and Oref, I. (1994) Effect of supercoUisions analytical expressions for collision efficiency and average energy transferred in collisions, J. Phys. Chem., 98, 3782. Oref, [. (1994) Local excitation in statistical systems, dynamics and supercollision effects, Chem. Phys., 187, 163-170. 

E.E.Nikitin, Intermolecular energy transfer in collisions of chemically active molecules, Doklady Akad. Nauk SSSR, 136, 1376 (1961)... 

Wall M C and Mullin A S 1998 Supercollision energy dependence state resolved energy transfer in collisions between highly vibrationally excited pyrazine (E uj = 37,900 cm and 40,900 cm" ) and CO2 J. Chem. Phys. 108 9658-67... 

Collision-induced rotational relaxation is very much more efficient when resonant transfer of electronic energy is possible than when it is not possible. The cross-sections reported for rotational energy transfer in collisions of Bjy and benzene molecules, and in collisions of... 

Elastic Scattering and Energy Transfer in Collisions of Charged Particles Coulomb Collisions... 

Unimolecular reactions with thermal, optical, or chemical activation are governed by a competition between intramolecular isomerization, dissociation, or the reverse association (or recombination) processes, and intermolecular energy transfer in collisions. In addition to these traditional unimolecular reactions, many other reaction systems may be considered from a unimolecular point of view when a particular intramolecular event can be separated from preceding or other subsequent processes. Following this more general use of the term, unimolecular reaction rate theory has found a quite general application, and has been harmonized with other theories of reaction dynamics. 

Figure 1 Relative rate constants for vibrational energy transfer in collisions of electronically excited I2 initial vibrational state v, change of vibrational state Av. Collision partner at left O = He, = Re, from ref. 39 at right = He from ref. 40)...

Figure 2 Relative rate constants for rovibrathnal energy transfer in collisions of electronically excited Li j with M = Ar...

Light-heavy-light reactions are also of experimental significance. For example, molecular beam measurements of angular distributions [2], and kinetic experiments yielding rate constants [3], have been carried out on the D+BrH- -DBr+H reaction. Furthermore, there has been much recent interest in the competition between non-reactive and reactive energy transfer in collisions such as H+C1H[4]. Vibrational quenching reactions like... 

W.R. Gentry, State-to-state energy transfer in collisions of neutral molecules, in ICPEAC XIV, 1985 (North-Holland, Amsterdam, 1986), p. 13... 

I. V. Hertel, H. Hofmann, K.A. Rost, Electronic to vibrational-rotational energy transfer in collisions of Na(3 P) with simple molecules. Chem. Phys. Lett. 47, 163 (1977)... 

Recently this idea has received much attention in the chemical physics community, brought about by accurate measurements [20-22] of rotational-vibrational energy transfer in collisions of H with H2. Kuppermann [23-26]... 

Though the Ehrenfest exponent alone can not be used for a reliable estimate of the energy transfer rate coefficient, its value provides an important indication at the most efficient pathway of the vibrational relaxation through the adiabaticity constraint on the energy exchange. To what extent a similar approach can be used for more complicated sysems is still an open question though it seems to be operative also in the vibrational energy transfer in collisions of triatomic [37] and polyatomic molecules with atoms [38]. 

James PL, Sims IR, Smith IWM. (1997) Total and state-to-state rate coefficients for rotational energy transfer in collisions between NO(X n) and He at temperatures down to 15 K. Chem. Phys. Lett. 272 412 18. 

Classical trajectories have long been used to study energy transfer in collisions. Wolfsberg and Kelley first used them to study some fundamental aspects of intermolecular energy transfer in model systems. A couple of years later more realistic studies were done. Since these early studies, classical trajectories have been used extensively to study collisional energy transfer. ... 

Trajectories have also been used to study energy transfer in collisions of methyl isocyanide with rare gas atoms." Calculations as a function of temperature were carried out in which statistical behavior of collisional energy transfer was investigated. The results provide some insight into weak collisions, that is, ones in which only a few of the degrees of freedom are actively involved and for which the rate of transfer is small. 

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