1. Air Force Research Laboratory, Space Vehicles Directorate, 29 Randolph Road, Hanscom AFB, Massachusetts 01731-3010, NRC Research Associateship Program, Keck Center of the National Academies, 500 Fifth Street, NW, GR 322A, Washington, D.C. 20001, Department of Natural Sciences, The Open University of Israel, Ramat Aviv, Tel Aviv, Israel, Department of Chemistry, Oakland University, Rochester, Michigan 48309-4401, and Institute for Physical Chemistry, University of Goettingen, Tammannstrasse 6, D-37077...