Experiments in Electron-impact Excitation and Ionization of Positive Ions
Author: Edward William Bell
Publisher:
Published: 1993
Total Pages: 602
ISBN-13:
DOWNLOAD EBOOKRead and Download eBook Full
Author: Edward William Bell
Publisher:
Published: 1993
Total Pages: 602
ISBN-13:
DOWNLOAD EBOOKAuthor: Erik Karl Kristian Wåhlin
Publisher:
Published: 1990
Total Pages: 478
ISBN-13:
DOWNLOAD EBOOKAuthor: Wade Thomas Rogers
Publisher:
Published: 1980
Total Pages: 570
ISBN-13:
DOWNLOAD EBOOKAuthor: Erik Karl Kristian Whalin
Publisher:
Published: 1990
Total Pages: 238
ISBN-13:
DOWNLOAD EBOOKAuthor: T.D. Märk
Publisher: Springer Science & Business Media
Published: 2013-06-29
Total Pages: 395
ISBN-13: 3709140285
DOWNLOAD EBOOKIt is perhaps surprising that a process which was one of the first to be studied on an atomic scale, and a process which first received attention over seven decades ago, continues to be the object of diverse and intense research efforts. Such is the case with the (seemingly) conceptually simple and familiar mechanism of electron impact ionization of atoms, molecules, and ions. Not only has the multi-body nature of the collision given ground to theoretical effort only grudgingly, but also the variety and subtlety of processes contributing to ionization have helped insure that progress has come only with commensurate work: no pain - no gain. Modern experimental methods have made it possible to effectively measure and explore threshold laws, differential cross sections, partial cross sections, inner-shell ionization, and the ionization of unstable species such as radicals and ions. In most instances the availability of experimental data has provided impetus and guidance for further theoretical progress.
Author:
Publisher:
Published: 1985
Total Pages:
ISBN-13:
DOWNLOAD EBOOKThe present review covers some of the fundamental aspects of electron-impact ionization. Highlights are described of some of the important experimental results which have been produced since 1981. (MOW).
Author: Frank Henry Field
Publisher:
Published: 1957
Total Pages: 368
ISBN-13:
DOWNLOAD EBOOKAuthor: F. Brouillard
Publisher: Springer Science & Business Media
Published: 2013-11-21
Total Pages: 543
ISBN-13: 1461335450
DOWNLOAD EBOOKSome 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.
Author: John Hooper
Publisher:
Published: 1963
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: James N. Bradbury
Publisher:
Published: 1972
Total Pages: 48
ISBN-13:
DOWNLOAD EBOOKAn experimental investigation of the electron impact excitation and ionization cross sections of N(4+) is described. A Van de Graaff accelerator coupled with a gas stripper was used to produce a beam of 2.7 MeV N(4+) ions which were separated from other charge states by magnetic and electrostatic analysis. The ions were crossed with a variable energy electron beam in a well-defined geometry. Radiation from the excited ions was observed with a photomultiplier downstream from the interaction region. The ions promoted to higher charge states were separated from the primary beam electrostatically and detected with an electron multiplier tube. Results are presented for the N(4+) transition (2s to 2p) in the collision energy range 125-400 eV. (Author).