Ebook: Atomic Spectra and Collisions in External Fields

This volume contains papers associated with the conference "Atomic Spectra and Collisions in External Fields II", that took place July 30-31 1987 at Royal Holloway and Beford New College. The first meeting of this name was held at the National Bureau of Standards in Gaithersburg, Maryland in 1984, and, if any tradition can yet be said to have been established in the series, it is that the proceedings be written after the conference. We hope thereby to preserve some impression of the discussions that took place, which in both cases were vigorous and unihibited. Both meetings happen to have convened in proximity to major developments in the field. At the time of the first conference, results of experimental measurements of dielectronic recombination in electron­ ion beams were beginning to appear. These showed large discrepancies with theoretical calculations, which were attributed to the effects of rather weak electric fields on the highly-excited states that mediate the recombination process. This conjecture gave rise to widespread concern in the plasma physics community that the representation of dielectronic recombination in existing plasma models, in which it plays an important role in energy and ionization balance, might be seriously in error due to neglect of the effects of electric and magnetic fields. The subject of field effects on recombination processes was thus a major focus of the 1984 meeting.

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Content:
Front Matter....Pages i-xiv
Laser Spectroscopy of the Diamagnetic Hydrogen Atom in the Chaotic Regime....Pages 1-7
Strongly Magnetized Atoms — in the Laboratory and in the Cosmos....Pages 9-36
Implications of New Evidence on Quasi-Landau Spectra for a Unified Treatment of Collisions and Spectra....Pages 37-45
Magnetic Rotation Spectroscopy with Synchrotrons and with Lasers....Pages 47-58
Photoabsorption and Photoionizaton of an Atom in a Magnetic Field....Pages 59-69
Atomic Diamagnetism....Pages 71-95
Oscillations in Absorption Spectra of Atoms in Magnetic Fields....Pages 97-107
Spectra of the Strongly Magnetized Hydrogen Atom Close to the Ionization Threshold....Pages 109-113
Accurate Eigenenergies for the Magnetized Hydrogen Atom....Pages 115-120
Liapunov Exponents for the Diamagnetic Kepler Problem and the Transition from Regular to Irregular Motion....Pages 121-128
Cross Section for Potential Scattering in the Presence of a Magnetic Field and Limit for B + 0....Pages 129-133
The Hydrogen Atom in a Strong Magnetic Field....Pages 135-139
The Hydrogen Atoms in Strong Electric Fields....Pages 141-150
Quantum Beats in the Electric-Field Mixing of the n = 2 States of Atomic Hydrogen....Pages 151-162
Noble Gas Atoms in Strong DC Electric Fields....Pages 163-176
An Atomic Interferometer....Pages 177-185
Effect of Polarizability of Alkali Dimers in Electron and Positron Scattering....Pages 187-192
Highly Excited Barium Rydberg Atoms in External Electric, Magnetic, and Combined Fields....Pages 193-213
Experimental Investigation and Analysis of Rydberg Atoms in the Presence of Parallel Magnetic and Electric Fields....Pages 215-232
Negative Ion Photodetachment in a Static External Field....Pages 233-243
Wavefunction Localization for the Hydrogen Atom in Parallel External Electric and Magnetic Fields....Pages 245-250
Some Aspects of Quantum Chaos....Pages 251-274
Quantum Chaos: Destruction and Scars of Symmetries....Pages 275-296
Stochastic Formulation of Energy Level Statistics: Application to the Hydrogen Atom in a Magnetic Field....Pages 297-313
Highly Excited Hydrogen Atoms in Strong Microwaves....Pages 315-326
Chaos in One-Dimensional Hydrogen....Pages 327-342
Two-Frequency Microwave Quenching of Highly Excited Hydrogen Atoms....Pages 343-357
Atoms in Intense Optical Fields: Ponderomotive Forces and Above-Threshold Ionization....Pages 359-373
Electron Energy Spectra in High Intensity Multiphoton Ionization....Pages 375-392
H2 in Intense Laser Radiation — Multiphoton Two Electron Direct Processes....Pages 393-407
Multiphoton Ionization of Atomic Hydrogen by Extra Photons....Pages 409-416
Strong-Field Excitation of Continuum Resonances....Pages 417-424
Low-Energy Radiative Scattering in a Laser Field....Pages 425-432
New Results on Multiphoton Free-Free Transitions....Pages 433-443
Multichannel Multiphoton Ionization of the Hydrogen Atom by a Chaotic Field: Role of the Polarization....Pages 445-449
Back Matter....Pages 451-457

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Content:
Front Matter....Pages i-xiv
Laser Spectroscopy of the Diamagnetic Hydrogen Atom in the Chaotic Regime....Pages 1-7
Strongly Magnetized Atoms — in the Laboratory and in the Cosmos....Pages 9-36
Implications of New Evidence on Quasi-Landau Spectra for a Unified Treatment of Collisions and Spectra....Pages 37-45
Magnetic Rotation Spectroscopy with Synchrotrons and with Lasers....Pages 47-58
Photoabsorption and Photoionizaton of an Atom in a Magnetic Field....Pages 59-69
Atomic Diamagnetism....Pages 71-95
Oscillations in Absorption Spectra of Atoms in Magnetic Fields....Pages 97-107
Spectra of the Strongly Magnetized Hydrogen Atom Close to the Ionization Threshold....Pages 109-113
Accurate Eigenenergies for the Magnetized Hydrogen Atom....Pages 115-120
Liapunov Exponents for the Diamagnetic Kepler Problem and the Transition from Regular to Irregular Motion....Pages 121-128
Cross Section for Potential Scattering in the Presence of a Magnetic Field and Limit for B + 0....Pages 129-133
The Hydrogen Atom in a Strong Magnetic Field....Pages 135-139
The Hydrogen Atoms in Strong Electric Fields....Pages 141-150
Quantum Beats in the Electric-Field Mixing of the n = 2 States of Atomic Hydrogen....Pages 151-162
Noble Gas Atoms in Strong DC Electric Fields....Pages 163-176
An Atomic Interferometer....Pages 177-185
Effect of Polarizability of Alkali Dimers in Electron and Positron Scattering....Pages 187-192
Highly Excited Barium Rydberg Atoms in External Electric, Magnetic, and Combined Fields....Pages 193-213
Experimental Investigation and Analysis of Rydberg Atoms in the Presence of Parallel Magnetic and Electric Fields....Pages 215-232
Negative Ion Photodetachment in a Static External Field....Pages 233-243
Wavefunction Localization for the Hydrogen Atom in Parallel External Electric and Magnetic Fields....Pages 245-250
Some Aspects of Quantum Chaos....Pages 251-274
Quantum Chaos: Destruction and Scars of Symmetries....Pages 275-296
Stochastic Formulation of Energy Level Statistics: Application to the Hydrogen Atom in a Magnetic Field....Pages 297-313
Highly Excited Hydrogen Atoms in Strong Microwaves....Pages 315-326
Chaos in One-Dimensional Hydrogen....Pages 327-342
Two-Frequency Microwave Quenching of Highly Excited Hydrogen Atoms....Pages 343-357
Atoms in Intense Optical Fields: Ponderomotive Forces and Above-Threshold Ionization....Pages 359-373
Electron Energy Spectra in High Intensity Multiphoton Ionization....Pages 375-392
H2 in Intense Laser Radiation — Multiphoton Two Electron Direct Processes....Pages 393-407
Multiphoton Ionization of Atomic Hydrogen by Extra Photons....Pages 409-416
Strong-Field Excitation of Continuum Resonances....Pages 417-424
Low-Energy Radiative Scattering in a Laser Field....Pages 425-432
New Results on Multiphoton Free-Free Transitions....Pages 433-443
Multichannel Multiphoton Ionization of the Hydrogen Atom by a Chaotic Field: Role of the Polarization....Pages 445-449
Back Matter....Pages 451-457
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