Recombination Of Molecular Positive Ions With Electrons
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Recombination Of Molecular Positive Ions With Electrons
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Author : M. A. Biondi
language : en
Publisher:
Release Date : 1964
Recombination Of Molecular Positive Ions With Electrons written by M. A. Biondi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with categories.
Results of studies of the recombination of electrons with molecular positive ions are presented. Theoretical arguments indicate that the dissociative process -- in which a molecular ion captures an electron without change of energy, forming an unstable excited molecule which then dissociates -- provides a highly efficient recombination mechanism. The nature of the process responsible for the large recombination rates observed in Laboratory afterglow studies is investigated using combined microwave, optical spectrometric and interferometric, and mass spectrographic techniques. Dissociative recombination is shown to be the process operative in the laboratory studies, since it is found that (a) molecular positive ions must be present to observe a large recombination rate, (b) when diatomic ions are present, excited atoms are formed in the recombination process, and (c) these excited atoms have kinetic energy of dissociation substantially in excess of thermal energy. (Author).
The Mobility And Recombination Of Positive Rare Gas Ions
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Author : J. M. Madison
language : en
Publisher:
Release Date : 1963
The Mobility And Recombination Of Positive Rare Gas Ions written by J. M. Madison and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1963 with categories.
This final report describes briefly (a) a microwave system for measuring the electron density in decaying plasmas over t density range of about five thousand, (b) an experimental tube for measuring the value of the mobility of positive ions by means of the transit-time method, and (c) the results obtained during the period of the contract. The studies were confined to the rare gas ions and excellent agreement was found between the value of the mobility of atomic and molecular ions as determined from ambipolar diffusion coefficient measurements and those found by means of the ion transit-time method. The influence of the presence of negative ions on the ambipolar diffusion coefficient of electrons was demonstrated. The recombination coefficients of molecular neon and molecular argon ions were found to be independent of pressure and the values were in excellent agreement with previous studies. (Author).
Dissociative Recombination
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Author : D. R. Bates
language : en
Publisher:
Release Date : 1988
Dissociative Recombination written by D. R. Bates and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Atoms categories.
Electron Ion And Ion Ion Recombination
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Author : Manfred A. Biondi
language : en
Publisher:
Release Date : 1963
Electron Ion And Ion Ion Recombination written by Manfred A. Biondi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1963 with categories.
Information obtained from laboratory experiments and theoretical calculations concerning electron ion and ion-ion recombination processes is re viewed. It is concluded that the two-boc esses of dissociative recombination and radia tive recombination between electrons and positive ions and of mutual neutralization of positive and negative ions are of importance for the iono sphere. Laboratory aferglow measurements on ions of ionospheric interest yield values for the dissociative recombination coefficients. Theoretical calculations yield radiative recom bination values for H(), He(), O() ions and electrons of 4-5 x 10 to the -12th power cc/sec at 250 K and a T(sub e) sup-0.5 dependence on electron temperature. Auxiliary processes affect ing ionospheric recombination, such as electron attachment to O2 molecules, charge transfer both for positive ions and negative ions, and ion conversion, are briefly considered. (Author).
Monte Carlo Calculations Of Cross Sections Of Electron Positive Molecular Ion Dissociative Recombination
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Author : Roger L. Wilkins
language : en
Publisher:
Release Date : 1965
Monte Carlo Calculations Of Cross Sections Of Electron Positive Molecular Ion Dissociative Recombination written by Roger L. Wilkins and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with categories.
In a recent paper, Bauer and Wu proposed a self-consistent model for the application of perturbation theory to calculating the general order of magnitude of cross sections of electron-positive molecular ion dissociative recombination. In applying their model to the calculation on a hypothetical system of electron capture by molecular hydrogen ions, it was necessary to make several approximations, without which it would have been exceedingly difficult to evaluate certain matrix elements. It is shown that Monte Carlo methods can be used for evaluating these matrix elements without restoring to approximations other than the model itself. The Monte Carlo method of stratified sampling has been tested successfully on the capture of electrons by molecular hydrogen ions. The dissociative recombination coefficient is found to be of the order of 3 x 10 to the -8th power cu cm/sec at room temperature, which is in agreement with reported experimental results. (Author).
Classical Treatment Of Quantal Collision Problems
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Author : Niall Andrew Young
language : en
Publisher:
Release Date : 1968
Classical Treatment Of Quantal Collision Problems written by Niall Andrew Young and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with categories.
Proceedings
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Author :
language : en
Publisher:
Release Date : 1970
Proceedings written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Detonation waves categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1975
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Aeronautics categories.
Physics Of Ion Ion And Electron Ion Collisions
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Author : F. Brouillard
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-21
Physics Of Ion Ion And Electron Ion Collisions written by F. Brouillard and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-21 with Technology & Engineering categories.
Some of the earliest civilizations regarded the universe as organized around four principles, the four "elements" earth. water, air, and fire. Fire, which was the source of light and as such possessed an immaterial quality related to the spiritual world. was clearly the most impressive of these elements, although its quanti tative importance could not have been properly discerned. M- ern science has changed the names, but macroscopic matter is still divided into four states. The solid, liquid, and gaseous states are ordinary states, but the fourth state of matter, the plasma state, has retained a somewhat extraordinary character. It is now recognized that most of the matter of the universe is in the ionized state. but on the earth. the plasma state is still the exception. Hence the importance and also the difficulty of investigations dealing with ionized matter, which have been greatly furthered by the development of thermonuclear fusion research. The study of matter in the ionized state comprises a large diversity of problems belonging to many different branches of phys ics. A number of them relate to the microscopic properties of plasmas and concern the structure and the collisional behavior of atomic constituents. Although they are clearly of basic importance, their relevance to thermonuclear research was at first overlooked, at a time when most of the effort was concentrated on designing fusion devices and understanding macroscopic phenomena, mostly of an electromagnetic nature. At present.
Electron Molecule Interactions And Their Applications
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Author : L. G. Christophorou
language : en
Publisher: Academic Press
Release Date : 2013-10-22
Electron Molecule Interactions And Their Applications written by L. G. Christophorou and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-22 with Science categories.
Electron-Molecule Interactions and Their Applications, Volume 2 provides a balanced and comprehensive account of electron-molecule interactions in dilute and dense gases and liquid media. This book consists of six chapters. Chapter 1 deals with electron transfer reactions, while Chapter 2 discusses electron-molecular positive-ion recombination. The electron motion in high-pressure gases and electron-molecule interactions from single- to multiple-collision conditions is deliberated in Chapter 3. In Chapter 4, knowledge on electron-molecule interactions in gases is linked to that on similar processes in the liquid state. Selected examples on the translation of the results of basic research on electron-molecule interactions to application are reviewed in Chapter 5. The last chapter covers the electron affinity of molecules, atoms, and radicals. This volume is a good reference for students and researchers conducting work on the intricate ways electrons and molecules interact in their encounters.