Institution: | (1) Atomic and Molecular Physics Division, Harvard-Smithsonian Center for Astrophysics, 02138 Cambridge, Massachusetts;(2) Time and Frequency Division, National Institute of Standards and Technology, 80303 Boulder, Colorado;(3) Department of Chemistry, Brookhaven National Laboratory, 11973 Upton, New York;(4) Present address: Dept. of Physics, Toyama University, Gofuku 3190, 930 Toyama, Japan;(5) Present address: Instituto Nacional de Pesquisas Espaciais, 12.201 Sao José dos Campos, SP, Brazil |