1. Introduction

Our knowledge about elastic photon-atom scattering has been significantly advanced by research efforts originating from, or coordinated with Richard Pratt and co-workers from the University of Pittsburgh. (A list of reports prepared by Richard Pratt's research group at the University of Pittsburgh contains over 110 manuscripts dealing primarily with photon scattering. Well over half of these have been published in refereed scientific journals or conference proceedings.) All these investigations, spanning more than three decades, had Richard Pratt as a primary motivating influence. This author's 25-year involvement with these studies simply could not have been sustained without Richard Pratt's support.

Although the results of numerous scattering studies have been published, only a small fraction of the actual scattering data have been made available in the form of traditional print. Aside from the issue of volume, traditional print distribution does not readily satisfy the reuse of this information in computer calculations. Therefore, an electronic form for distribution for our scattering data is desirable. A subset of our data has been available for some time on the Internet from a World-Wide-Web site at Lawrence Livermore National Laboratory, accessible through the URL (uniform resource locator)

http://www-phys.llnl.gov/Research/scattering/

This report describes a new expanded database of scattering-related information. In addition to its availability on the Internet, it has also been formatted and recorded to CD-ROM (compact disc, read-only-memory). This medium has some advantages for distribution to areas without reliable high-speed access to the Internet. It is also a more static medium than the World Wide Web.

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Information date: Sep. 2, 2000 lk