1. Department of Chemistry and Biochemistry, Eastern Washington University, Cheney, Washington 99004, Department of Physics and Astronomy, State University of New York, Stony Brook, New York 11794, Clarendon Laboratory and Department of Physics, Oxford University, Oxford, U.K. OX1 3PU, ISIS Pulsed Muon Facility, Rutherford-Appleton Laboratory, Chilton, Oxfordshire, U.K. OX11 0QX, National High Magnetic Field Laboratory and, Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545,...