Beam-Foil Spectroscopy Volume 1 Atomic Structure and Lifetimes

The appreciable evolution of the nearly teenaged branch of atomic and molecular physics called beam foil spectroscopy is clearly depicted in the present volumes, which are devoted to publication of presentations at the Fourth International Conference on Beam Foil Spectroscopy and Heavy Ion Atomic Physics Symposium. The transition from childhood to adolescence parallels human experience in that diffusion of interests and interactions beyond the confines of the original family has most certainly occurred. The pre-occupation with techniques and their develop­ ment has been largely replaced by interest in the physics of the widest possible array of atomic and molecular physics experiments, in which spectroscopic study (visible, UV, XUV, X-ray, electron) of collisional interactions of fast beams is the unifying theme. The description "accelerator-based atomic physics" is perhaps more representative of the subject today than is the original, beam-foil spectroscopy," since so many experiments have nothing to do with foils, and furthermore, employ spectroscopy mainly as an incidental tool. What, then distinguishes beam-foil spectro­ scopy from overlapping fields of atomic collisions physics? In an era where the boundaries are becoming ever more diffuse, there can be no clear definition. A good functional definition was recently conceived by Peter Erman, under the salubrious stimulus of a large Tennessee bourbon: it is the tribal experience of the community of scientists who have banded together to develop the discipline over the past dozen years, as shared at the triennial conferences devoted to it.

of Volume 1.- The Term Analysis of Atomic Spectra: Present Status and Remaining Problems.- Recent Configuration Interaction Studies in Atomic Lifetimes.- Oscillator Strengths for Ac I, Sc II and Ti III.- Transition Probabilities for Ionized Atoms.- Correlation Effects and f-Values in the Sodium Sequence.- On the Possibility of Observing Nonexponential Decays in Autoionizing States.- Coulomb Methods in Atomic Transition Probability Calculations.- Lamb Shift in Hydrogenlike Ions.- Hyperfine Quenching of the 23P0 State in Heliumlike Ions.- Anomalies in the Fine and Hyperfine Structure.- Relativistic Contributions to Transition Energies in NiI and CuI Isoelectronic Sequences.- Oscillator Strengths in N, N+,O and O+ Obtained From the First Order Theory of Oscillator Strengths (Fotos).- Lifetimes and Fluorescence Yields of Three-Electron Ions.- Future Directions for Beam-Foil Spectroscopy.- Review of Experimental Lifetimes: Third Period Elements.- Review of Experimental Lifetimes: Fourth Period Elements.- Heavy-Element Beam-Foil Lifetime Measurements and Related Experimental Problems.- Measurements of He I Lifetimes and Fine Structure by a Two-Spectrometer Method.- Mean-Lives of RbII in the Visible and Vacuum Ultraviolet.- Applications of High Resolution Measurements of Optical Lifetimes.- Beam-Gas Studies of Cu II, C1 II, and As II.- Beam-Foil Study of S III — S VI.- The Independent-Electron Model Applied to 100—600 keV Sulfur Beam-Foil Population Functions.- Beam-Foil Spectroscopy at the University of Alberta.- Decay of the 2p3p3S1 Level of O III.- Profiles of the Spectral Lines Near 2363Å and 2577Å From Foil-Excited He.- Relative Initial Populations of Foil-Excited He I States.- Radio Frequency Spectroscopy with a Fast Atomic Beam.- X-Rays From Foil-Excited Beams atTandem Energies.- Lifetime Measurement of the 3P1 State of Heliumlike Sulphur.- Radiative Decay and Fine Structure of the 23Po and the 23S1 States of Helium-like Krypton (Kr XXXV).- Radiative Decay of the 23P States of Heliumlike Argon.- Extreme Ultraviolet Spectra of Highly Stripped Silicon Ions.- Beam Foil Spectroscopy of Highly Ionized Fluorine, Silicon and Copper Beams.- Beam-Foil Studies of Nitrogen, Sulfur and Silicon.- Recent Beam-Foil Mean-Life Measurements in Fluorine V-VIII.- Beam-Foil Spectroscopy of Highly-Ionized C, N, O and Ne Atoms at 1 MeV/Nucleon.- Spectroscopy of Heavy Ions Using the Beam-Foil Technique.- Satellite Lines in Highly-Stripped Ions of B,C,N,O, and F.- Doubly-Excited States in B III.- Doubly-Excited States in N V and N VI.- The Atomic Physics Potential of New Accelerators.- Autoionizing States in the Alkalis.- Metastable Autoionizing Quartet- Quintet- and Sextet States in B.- Auger Electron Emission Spectra From Foil and Gas Excited Carbon Beams.- Autoionizing States in Highly Ionized Oxygen, Fluorine, and Silicon.