Affiliation: | (1) Medical Research Council Cyclotron Unit, Hammersmith Hospital, W12 OHS London, England;(2) Division of Radiation Science and Acoustics, National Physical Laboratory, TW11 OLW Teddington, Middx., England;(3) Nuclear Chemistry Group (CNC-11) Los Alamos Scientific Laboratory, 87545 Los Alamos, New Mexico, USA |