NEW PRODUCTION SYSTEMS AT ISOLDE

New target systems for the ISOLDE on-line mass separator facility are presented. Targets of carbides, metal/graphite mixtures, foils of refractory metals, molten metals and oxides have been tested. Beams of high intensity of neutron-rich isotopes of a large number of elements are obtained from a uranium carbide target with a hot plasma-discharge ion source. A target of ZrO2 has been shown to provide high intensity beams of neutron-deficient isotopes of Mn, Cu, Zn, Ga, Ge, As, Se, Br, Kr and Rb, while a SiC target with a hot plasma ion source gives intense beams of radioactive isotopes of a number of light elements. All these systems are rather chemically unselective. Chemically selective performance bas been obtained for several systems, i.e.: the production of neutron-deficient Au from (He-3, pxn) reactions on a Pt/graphite target with a hot plasma ion source; the production of neutron-deficient Lu and LuF+ and Hf and HfF3+ from a Ta-foil target with a hot plasma ion source under CF4 addition; the production of neutron-deficient Sr as SrF+ and Y as YF2+ form a Nb-foil target with a W surface ionizer under CF4 addition; the production of neutron-deficient Se as COSe+ from a ZrO2 target with a hot plasma ion source under O2 addition; and the production of radioactive F from a SiC target with a hot plasma ion source operating in Al vapour.