The Einstein equation for fluctuation probabilities of a thermodynamical system and the energy symmetrization in inelastic molecular-collision processes

1986 ◽  
Vol 91 (2) ◽  
pp. 179-200 ◽  
Author(s):  
G. Mastrocinque
Keyword(s):  
Einstein Equation ◽  
Molecular Collision ◽  
Collision Processes

scholarly journals Low-Energy Molecular Collision Processes in Space

1987 ◽  
Vol 120 ◽  
pp. 31-41
Author(s):  
Kazuo Takayanagi
Keyword(s):  
Cross Sections ◽  
Reaction Rates ◽  
Intermolecular Forces ◽  
Low Energy ◽  
Collision System ◽  
Molecular Collision ◽  
Section Data ◽  
Collision Partner ◽  
Collision Processes ◽  
Chemical Reaction Rates

Among the low-energy nonreactive molecular collisions, the rotational and vibrational transitions are the most important inelastic processes. the collision partner is an electron, an ion, or a neutral particle. Depending on the process and the collision system concerned, the magnitude and the energy dependence of the relevant cross sections are widely different. the present status of our knowledge is briefly summarized and some sample cross section data for H2and CO are shown. Useful relations among the rotational cross sections are indicated. the importance of the long-range intermolecular forces in determining some chemical reaction rates is also pointed out.

scholarly journals The oxidation of phosphine at low pressures

1929 ◽  
Vol 125 (797) ◽  
pp. 294-308 ◽  
Keyword(s):  
Energy Content ◽  
Stable Condition ◽  
High Energy ◽  
Gaseous Reaction ◽  
Molecular Collision ◽  
Active Chemical ◽  
Recent Developments ◽  
Collision Processes ◽  
A Chain ◽  
Low Pressures

In the recent developments of chemical kinetics there have been many indications of a type of reaction known as a chain reaction, in which each act of transformation gives rise to a product which, on account of its active chemical nature or high energy content, causes further molecules to be transformed without special activation. Under certain conditions the chain may "branch," and the number of centers from which reaction proceeds increases indefinitely unless the chains are broken. In a gaseous reaction there may be a definite concentration at which the rate of initiation of chains just begins to exceed the rate at which they are broken. At this point a stable condition ceases to be possible. However slow the reaction may be on one side of the limiting concentration, on the other side its rate increases continuously with time till explosion results. The acceleration may require an imperceptible fraction of a second only, since the time scale on which molecular collision processes occur is a very minute one. The remarkable phenomenon to which this gives rise, namely an abrupt transition from negligibly slow reaction to explosion, is exemplified in the union of oxygen with phosphorus vapour and with sulphur vapour at low pressure, and in the combination of hydrogen and oxygen under certain conditions. The present paper deals with a similar phenomenon in the oxidation of phosphine.

scholarly journals DIVISION B COMMISSION 14 WORKING GROUP: COLLISION PROCESSES

2015 ◽  
Vol 11 (T29A) ◽  
pp. 120-136
Author(s):  
Gillian Peach ◽  
Milan S. Dimitrijevic ◽  
Paul S. Barklem
Keyword(s):  
Charge Transfer ◽  
Spectral Line ◽  
Working Group ◽  
Inelastic Collisions ◽  
Line Broadening ◽  
Heavy Particles ◽  
Molecular Collision ◽  
Collision Processes ◽  
Spectral Line Broadening ◽  
The Web

Since our last report (Peach & Dimitrijević 2012), a large number of new publications on the results of research in atomic and molecular collision processes and spectral line broadening have been published. Due to the limited space available, we have only included work of importance for astrophysics. Additional relevant papers, not included in this report, can be found in the databases at the web addresses provided in Section 6. Elastic and inelastic collisions between electrons, atoms, ions, and molecules are included, as well as charge transfer in collisions between heavy particles which can be very important.

scholarly journals Time-dependent close-coupling calculations of atomic and molecular collision processes

2007 ◽  
Vol 88 ◽  
pp. 012012 ◽  
Author(s):  
M S Pindzola ◽  
F Robicheaux ◽  
S D Loch ◽  
J C Berengut ◽  
J Colgan ◽  
...  
Keyword(s):  
Time Dependent ◽  
Close Coupling ◽  
Molecular Collision ◽  
Collision Processes
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