Vibrational relaxation in fluids: A critical analysis of the independent binary collision theory

1988 ◽  
Vol 89 (7) ◽  
pp. 4145-4153 ◽  
Author(s):  
Peter S. Dardi ◽  
R. I. Cukier
Keyword(s):  
Vibrational Relaxation ◽  
Critical Analysis ◽  
Binary Collision ◽  
Collision Theory

Binary collision theory for thermal and nonisothermal relaxation and reaction of polyatomic molecules

1998 ◽  
Vol 235 (1-3) ◽  
pp. 131-146 ◽  
Author(s):  
Peter Talkner ◽  
Eli Pollak ◽  
Alexander M. Berezhkovskii
Keyword(s):  
Polyatomic Molecules ◽  
Binary Collision ◽  
Collision Theory

Vibrational Relaxation Process in Binary Collision of Diatomic Molecules

2002 ◽  
Vol 2002.3 (0) ◽  
pp. 103-104
Author(s):  
Hiroki YAMAGUCHI ◽  
Shu TAKAGI ◽  
Yoichiro MATSUMOTO ◽  
Nobuyuki Tsuboi
Keyword(s):  
Relaxation Process ◽  
Vibrational Relaxation ◽  
Diatomic Molecules ◽  
Binary Collision

Interaction volume of electron beam in carbon nanomaterials: A molecular dynamics study

2014 ◽  
Vol 1700 ◽  
pp. 29-35
Author(s):  
Masaaki Yasuda ◽  
Shinya Wakuda ◽  
Yoshiki Asayama ◽  
Hiroaki Kawata ◽  
Yoshihiko Hirai
Keyword(s):  
Molecular Dynamics ◽  
Electron Beam ◽  
Carbon Atom ◽  
Electron Irradiation ◽  
Md Simulation ◽  
Carbon Nanomaterials ◽  
Primary Energy ◽  
Binary Collision ◽  
Collision Theory ◽  
Interaction Volume

ABSTRACTA molecular dynamics (MD) simulation was performed to study the interaction volume of electron beam in carbon nanomaterials. The interaction between incident electron and carbon atom in the target materials during electron irradiation is introduced by the relativistic binary collision theory. The motion of each atom in the material under electron irradiation is calculated with the MD simulation. The primary energy dependence of the interaction volume in the carbon nanotube and the multi-layered graphene are studied. The secondary damages caused by the knock-on atoms are also discussed.

Temperature dependence of vibrational relaxation times in gases

1958 ◽  
Vol 244 (1237) ◽  
pp. 212-219 ◽  
Keyword(s):  
Energy Transfer ◽  
Methyl Bromide ◽  
Sulphur Dioxide ◽  
Vibrational Relaxation ◽  
Transition Probability ◽  
Relaxation Times ◽  
Methyl Chloride ◽  
Collision Theory ◽  
Ultrasonic Dispersion ◽  
Carbon Tetrafluoride

Ultrasonic dispersion measurements at varying temperatures, extending over the range 290 to 580° K, have been made on gaseous ethylene, cyclo propane, carbon tetrafluoride, methyl chloride and methyl bromide. The results are correlated with previous measurements on methyl fluoride and sulphur dioxide. The non-polar gases show a steady rise in the probability of energy transfer between translation and vibration with rise in temperature. The transition probability, P 10 , is found to vary with exp — T -½ in accordance with current collision theory, but the quantitative dependence cannot be predicted from molecular properties. The polar gases behave in a similar way at higher temperatures, but at lower temperatures the transition probability increases with falling temperature. This is interpreted as due to increasing predominance of oriented collisions, which are specially favourable for energy transfer, between polar molecules at lower temperatures.

Calculation of vibrational relaxation times in gaseous sulphur dioxide

1957 ◽  
Vol 243 (1232) ◽  
pp. 84-93 ◽  
Keyword(s):  
Specific Heat ◽  
Sulphur Dioxide ◽  
Vibrational Relaxation ◽  
Vibrational Excitation ◽  
Relaxation Times ◽  
Collision Theory ◽  
Relaxation Behaviour ◽  
Ultrasonic Dispersion ◽  
Higher Modes ◽  
Dispersion Data

Approximate vibrational relaxation times have been calculated for gaseous sulphur dioxide at 373°K using the collision theory of Schwartz & Herzfeld (1954). Two major effective relaxation times are found; the shorter associated with the relaxation of the specific heat contribution of the lowest mode and the longer with the relaxation of the total contributions of the two higher modes. The results are compared with the recent ultrasonic dispersion data of Lambert & Salter (1957), a measure of agreement being found. The mechanism of vibrational excitation in gaseous sulphur dioxide is discussed and compared with that in some similar molecules. Tentative predictions are made about the relaxation behaviour of a few selected molecules.

Features of the Evolution of 4He+ Ion Flux in Yttrium Iron Garnet in the Channeling Mode

2015 ◽  
Vol 1084 ◽  
pp. 187-190
Author(s):  
Vasily M. Malyutin ◽  
Dmitry A. Karpov ◽  
Yury Yu. Kryuchkov
Keyword(s):  
Yttrium Iron Garnet ◽  
Complex Structure ◽  
Orientation Dependence ◽  
Binary Collision ◽  
Crystalline Material ◽  
Ion Flux ◽  
Collision Theory ◽  
Yttrium Iron ◽  
Iron Garnet ◽  
Fast Ion

The previously revealed features of orientation dependences in the experimental research devoted to the channeling of ions in the multicomponent crystals of yttrium iron garnet are the reflection of the complex structure of a crystalline material. The study incorporates the development of a numerical model describing the distribution of fast ion flux in the crystal of garnet in the framework of the binary collision theory. The model is intended for the detailed elucidation of the causes of the discovered features. The calculation demonstrated the orientation dependence features similar to those established in the experiments.

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