4Th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas POSTER PAPERS
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4th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas POSTER PAPERS Jack Sugar and David Leckrone, Editors 7he National Institute of Standards and Technology was established in 1988 by Congress to "assist industry in the development of technology . needed to improve product quality, to modernize manufacturing processes, to ensure product reliability . and to facilitate rapid commercialization ... of products based on new scientific discoveries." NIST, originally founded as the National Bureau of Standards in 1901, works to strengthen U.S. industry's competitiveness; advance science and engineering; and improve public health, safety, and the environment. 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Brown, Secretary National Institute of Standards and Technology Raymond G. Kammer, Acting Director National Institute of Standards U.S. Government Printing Office For sale by the Superintendent and Technology Washington: 1993 of Documents Special Publication 850 U.S. Government Printing Office Natl. Inst. Stand. Technol. Washington, DC 20402 Spec. Publ. 850 199 pages (Apr. 1993) CODEN: NSPUE2 Sponsors National Institute of Standards and Technology National Aeronautics and Space Administration Naval Research Laboratory U.S. Department of Energy, Office of Fusion Energy National Science Foundation Computer Sciences Corporation IBM Program Committee D. Leckrone (Chairman), NASA, Goddard Space Flight Center, Greenbelt, MD S. Adelman, CITADEL, Charleston, SC R. C. Elton, Naval Research Laboratory, Washington, D.C. J. E. Hansen, Zeeman Laboratory, University of Amsterdam S. Johansson, University of Lund, Sweden R. McKnight, U.S. Department of Energy, Germantown, MD D. Morton, Herzberg Institute of Astrophysics, NRC, Ottawa, Canada J. Sugar, NIST, Gaithersburg, MD Organizing Committee J. Sugar (Chairman), NIST, Gaithersburg, MD R. Bell, University of Maryland, College Park, MD L. Curtis, University of Toledo, Toledo, OH G. Doschek, Naval Research Laboratory, Washington, D.C. D. Leckrone, NASA, Goddard Space Flight Center, Greenbelt, MD W. Wiese, NIST, Gaithersburg, MD iii It Colloquium This was the fourth in a series of colloquia begun at the Description University of Lund, Sweden in 1983 and subsequently held in Toledo, Ohio and Amsterdam, The Netherlands. The purpose of these meetings is to provide an international forum for communication between major users of atomic spectroscopic data and the providers of these data. This affords an opportunity for the users to review their present and future needs and the providers to review their laboratory capabilities, new developments in data measurement, and improved theoretical capabilities. These data include atomic wavelengths, line shapes, energy levels, lifetimes, and oscillator strengths. Speakers were selected from a wide variety of disciplines including astrophysics, laboratory plasma research, spectrochemistry, and theoretical and experimental atomic physics. Contact between data users and providers has grown even more critical today with the prolific acquisition of data from space- based astrophysical observatories, with high temperature laboratory experiments in fusion energy and x-ray lasers, and with the demands for higher accuracy and large quantities of data from neutral to highly ionized atoms. The means of delivery of these data with new light sources such as the tokamak, the electron beam ion trap (EBIT), laser-generated plasmas, inductively-coupled plasmas (ICP), and with new techniques such as laser-induced fluorescence and fourier transform spectroscopy, has advanced considerably. These colloquia assist in matching these resources with the current and anticipated demands for atomic data. Format The progi'am consisted of presentations by invited speakers and poster sessions. One session was devoted to an informal workshop at which users of data briefly described their most immediate needs and providers of data give brief summaries of work currently in progress. The invited papers will be published in a topical issue of Physica Scripta. iv Table of Contents Lifetimes-theory Transition Rates in the 3d^ Configuration of the Calcium Isoelectronic Sequence 3 E. Biemont, J. E. Hansen, P. Qiiinet, and C. J. Zeippen Oscillator Strengths of Astrophysical Interest for Ol-sequence 4 K. S. Baliyan and A. K. Bhatia Radiative Data for Si-like Ions: Si°, S-^, A^^, Ca^+ 7 Sultana N. Nahar and Anil K. Pradhan Large Scale Radiative and Collisional Calculations for Fe II 10 Sultana N. Nahar and Anil K. Pradhan Calculation of Oscillator Strengths in Hg III 13 P. H. M. Uylings, A. J. J. Raassen, A. A. Joueizadeh, J. O. Ekberg Se. Johansson, and J.-F. Wyart Transitions in Neutral Chromium 16 D. J. R. Robinson and A. Hibbert RCI Calculation of Energy Levels and Oscillator Strengths in Highly Ionized Atoms 19 Takashi Kagawa, Yoshie Honda, and Shiiji Kiyokawa A Density-Matrix Description for the Broadening of Spectral Lines by Autoionization, Radiative Transitions, and Collisions 22 V. L. Jacobs Developments in Computation of Form Factors 23 C. T. Chantler Accurate Oscillator Strengths for Neutral Carbon and Astrophysical Implications 26 E. Biemont, A. Hibbert, M. R. Godefroid, and N. Vaeck Relativistic Study of Lifetimes for the ns^np^(n + l)s Levels in Heavy Systems 29 Jacek R. Bieroh and Jacek Migdalek Oscillator Strengths for the Transitions in Singly Ionized Kr II 31 P. Anantha Lakshmi and K. S. Baliyan V Lifetimes — measurements Transition Probabilities and Line Shapes: Usage and Needs at the University of Illinois 37 Alexander Scheeline, Cheryl A. Bye, Herman Krier, Jyotirmoy Mazumder, Xiangli Chen, Tom Duffey, Siidhir Tewari, David Zerkle, and Mark J. Kushner New Measurements in the Spectrum of Neutral Lithium (Li I) by Fourier Transform Spectroscopy 40 Leon J. Radziemski, Rolf Engleman, and James Brault The Atomic Branching Ratio Project at NIST 41 /. Z. Klose and W. L. Wiese Precision Measurement of the Mean Life of the Ar II 4p' Level 44 Jian Jin and D. A. Church Accurate Oscillator Strengths for Interstellar Ultraviolet Lines of CI I 47 R. M. Schectman, S. R. Federman, D. J. Beideck, and D. G. Ellis Relative Intensities of Resonance Transitions in B-like Ions 50 /. Doerfert, E. Trabert, P. H. Heckmann, G. Mdller, J. Granzow, and C. Wagner Accelerator-based Spectroscopy Projects at Bochum 53 E. Trabert Work in Progress at the Lund VUV-FTS 56 Ulf Litzen and Sveneric Johansson Radiative Decay Rates