Read e-book online Advances In Atomic, Molecular, and Optical Physics, Vol. 29 PDF

By Sir David Bates (ed.), Benjamin Bederson (ed.)

ISBN-10: 0120038293

ISBN-13: 9780120038299

This sequence, demonstrated in 1965, is anxious with contemporary advancements within the common zone of atomic, molecular and optical physics. the sphere is in a nation of swift development, as new experimental and theoretical recommendations are placed to undergo on many elderly and new difficulties. Such difficulties variety from experiences of the basic homes of radiation and topic, via experiences of hitherto inaccessible states of "ordinary" and unique atoms and molecules, the keep watch over of atoms and molecules via gentle, the behaviour of atoms and molecules in excessive radiation fields, the precise constitution of such structures, together with advanced molecules and molecular clusters, and a variety of interplay phenomena between atoms, molecules, their constituent elements and fields. issues coated contain similar utilized components, corresponding to atmospheric technology, astrophysics, floor physics and laser physics.

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Here we shall not consider this aspect of the problem, which has been discussed in detail in Delone and Krainov (1985), Faisal(1987), Morellec et al. (1982), and Chin and Lambropoulos (1984). From the first principles it follows that the perturbation theory in the first nonvanishing (Kth) order is applicable to describing the process of multiphoton atom ionization if the following three conditions are satisfied (Delone and Krainov, 1985): (1) The strength of the external field E should be much less than the atomic strength E, .

After the radiating atoms produced by this pulse decayed for about 12ps, a second pulse with electron energies too low to produce ground-level excitation but with enough energy to excite out of the metastable levels was produced. The metastable density was measured using optical absorption. It was indicated that the population of the 4p55s 3P2 level exceeded that of the 4ps5s 3P0level by an order of magnitude. By assuming that the majority of stepwise excitation proceeded through the 4p55s 3P2 level, the apparent excitation cross sections for electron excitation out of the 3P2metastable level into the 2pl, .

3 we present the experimental data related to formation of single- and double-charge strontium ions. The detailed experimental examination of multicharge ion production that has been made in many studies has enabled one to make two important conclusions about the character of this process. The first conclusion is that the multicharge ions are produced in the process of cascade ionization. The successive stages of 40 Ammosov, Delone, and Ivanov FIG. 3. , 1979). One may notice that in the region where the saturation of the Sr+ ion yield occurs, the number of Sr2+ions is only several times smaller than the number of Sr+ ions.

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Advances In Atomic, Molecular, and Optical Physics, Vol. 29 by Sir David Bates (ed.), Benjamin Bederson (ed.)


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