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Mark A. Dubinski, Prabhakar Misra's Ultraviolet Spectroscopy and UV Lasers PDF

By Mark A. Dubinski, Prabhakar Misra

ISBN-10: 0824706684

ISBN-13: 9780824706685

Offers a whole and thorough exam of the newest advances within the instrumentation, evaluate, and implementation of UV know-how for trustworthy and effective facts acquisition and research. Discusses the LIF process for learning natural molecules at low vibrational temperatures.

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Offers a whole and thorough exam of the most recent advances within the instrumentation, assessment, and implementation of UV expertise for trustworthy and effective information acquisition and research. Discusses the LIF procedure for learning natural molecules at low vibrational temperatures.

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This kind of process is important for discharges in noble gases and influences the characteristics of the observed discharge current. In general, at higher discharge currents, the mechanism of electron impact ionization dominates over Penning ionization, leaving the latter hardly noticeable [46,47]. Copyright © 2002 by Taylor & Francis Broglia et al. [48] demonstrated that photoionization can influence the discharge current in hollow cathode DC lamps. The researchers showed that the dark space of hollow-cathode discharges exhibits signals much more rapidly than the conventional OG signals and related them to direct laser photoionization.

OG transitions of argon have also been observed in the following wavelength regions: 367–422 nm [20], 415–670 nm [17], 425–700 nm [22], 420– 740 nm [18], 555–575 nm [24], 727–772 nm [16], 360–740 nm [19], and 2440– 2780 nm [15]. Most of the work cited above, for both neon and argon, describes the general nature of the optogalvanic signals in various wavelength regimens. However, very few studies [25,26,27] reported in the literature identify and quantitatively characterize the dominant physical processes contributing to the production of the optogalvanic signals in a discharge plasma.

An effective use of the rate equation formalism to describe the different discharge processes can lead to a very large number of equations for which cross-section values are unavailable. Thus, any knowledge of the prop- Copyright © 2002 by Taylor & Francis erties of a particular discharge is usually largely empirical. An extended and refined version of a mathematical rate equation model for the population distribution of the atomic species in a commercial hollow cathode discharge lamp, set forth by Han et al.

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Ultraviolet Spectroscopy and UV Lasers by Mark A. Dubinski, Prabhakar Misra


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