By MATS LARSSON, ANN E. OREL
ISBN-10: 0521828198
ISBN-13: 9780521828192
Dissociative recombination (DR) of molecular ions with electrons is a posh, poorly understood molecular strategy. Its serious position as a neutralising agent within the Earth's top surroundings is now good verified and its incidence in lots of usual and laboratory produced plasma has been a powerful motivation for learning the development. For the 1st time, theoretical options, experimental technique and functions are united in a single ebook, revealing the governing ideas in the back of the gas-phase response. The e-book takes the reader throughout the highbrow demanding situations posed, describing intimately dissociation mechanisms, dynamics, diatomic and polyatomic ions and similar methods, together with dissociative excitation, ion pair formation and photodissociation. With the ultimate bankruptcy devoted to purposes in astrophysics, atmospheric technology, plasma physics and fusion study, it is a concentrated, definitive consultant to a primary molecular procedure. The ebook will attract lecturers inside of physics, actual chemistry and comparable sciences.
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Extra resources for Dissociative Recombination of Molecular Ions
Sample text
Typical electron currents Ie are 15 to 30 µA, whereas the ion current is kept below 5 nA. (Reproduced with permission from R. A. Phaneuf, C. C. Havener, G. H. Dunn, and A. M¨uller, “Mergedbeams experiments in atomic and molecular physics,” Rep. Prog. Phys. 62, pp. ) perpendicular electric field. In the E × B field the electrons exhibit cycloidal motion, which is a combination of a steady motion along the z-axis, a cyclotron motion around the magnetic field, and a drift perpendicular to E and B.
The better the internal state distribution is characterized in any given experiment, the more useful the result will be. 11 Generic potential curves for the molecular ion AB+ . The arrows show electronic excitation from the two lowest vibrational levels in the electronic ground state. In the single-pass merged-beam experiment shown in Fig. 8, the time between ion creation and ion destruction is very short, typically in the microsecond range. Thus, the ions exposed to the electron beam will have the same internal state distribution as when they were formed in the ion source.
15) where the quantities on the right hand side are defined in the previous section. 16) ni = ji . 19) Se Ii = Si where Se and Si are the cross sectional areas of the electron and the ion beams, respectively. Integrating Eq. 15) over the entire interaction volume and making use of Eqs. 19) gives R= V je (x, y, z) ji (x, y, z)dxdydz . 1 Merged beams 23 is called the form factor. Since the beams are merged, the form factor is sometimes defined after integration over the merged path (along the x-axis in Fig.
Dissociative Recombination of Molecular Ions by MATS LARSSON, ANN E. OREL
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