Affiliation: | (1) Department of Physics, Rice University, 77251 Houston, TX, USA;(2) Department of Physics, University of Saskatchewan, S7N 0W0, Saskatchewan, Canada;(3) Department of Physics, University of British Columbia, V6T 1W5 Vancouver, B.C., Canada;(4) TRIUMF, 4004 Wesbrook Mall, V6T 2A3 Vancouver, B.C., Canada;(5) Present address: Opto-Elec. Div., Hewlett-Packard, 95131 San Jose, CA, USA;(6) Present address: Pritzker School of Medicine, University of Chicago, 60637 Chicago, IL, USA |