1. Theoretical Division Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
2. Current address: Department of Chemistry The University of Akron Akron Ohio 44325-3601 USA
3. Chemistry Division Los Alamos National Laboratory MS J514 Los Alamos New Mexico 87545 USA
4. Department of Chemistry Washington State University and Pacific Northwest National Laboratory Pullman Washington 99164
5. 902 Batelle Blvd Richland Washington 99352 USA