Download e-book for kindle: Advances In Atomic, Molecular, and Optical Physics, Vol. 29 by Sir David Bates (ed.), Benjamin Bederson (ed.)

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

ISBN-10: 0120038293

ISBN-13: 9780120038299

This sequence, demonstrated in 1965, is worried with fresh advancements within the common region of atomic, molecular and optical physics. the sector is in a kingdom of quick progress, as new experimental and theoretical options are positioned to endure on many elderly and new difficulties. Such difficulties variety from stories of the basic houses of radiation and topic, via reports of hitherto inaccessible states of "ordinary" and unique atoms and molecules, the keep watch over of atoms and molecules by way of mild, the behaviour of atoms and molecules in excessive radiation fields, the exact constitution of such platforms, together with advanced molecules and molecular clusters, and quite a lot of interplay phenomena between atoms, molecules, their constituent elements and fields. themes coated contain comparable utilized parts, reminiscent of atmospheric technology, astrophysics, floor physics and laser physics.

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Additional resources for Advances In Atomic, Molecular, and Optical Physics, Vol. 29

Example text

If the atom absorbs the threshold number K of radiation quanta, the energy E = Khw - I < hw is distributed between the positive ion and the electron and, since the latter is much lighter, practically all of it transforms into electron kinetic energy. , where y << l ) , the ionization process has the character of a tunneling in an alternating field (Delone and Krainov, 1985). By substituting numerical values into Eq. 0) x E, (E, being the atomic energy unit), and for field strengths E << E,, y >> 1 for radiation in the near ultraviolet, visible, and near-infrared frequency ranges.

Threshold ((K $)-photon) channels with the same probability. Let us mention that the above-threshold ionization is observed for all atoms (from hydrogen to noble-gas atoms) and for several molecules within a wide range of radiation frequencies, from near infrared to near ultraviolet (Delone and Fedorov, 1989a,b). Here we shall not discuss the theoretical interpretation of the abovethreshold ionization both because this is a very complicated problem and because at present it is impossible to make some of the final conclusions.

The results they obtained show resonance structure in both the Is, and Is, cross sections. There are also several nonoptical measurements of the electron excitation cross sections for the metastable Is, and Is, levels of Ne. A. They normalized their cross sections to those of Teubner et at. (1985) at 26 eV for absolute calibration. Earlier measurements of the sum of the apparent excitation cross sections of the two metastable levels include the work of Dorrestein (1942). He used electron bombardment of a Ne gas to form metastables.

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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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