Purification of a Zn radioactive ion beam by alkali suppression in a quartz line target prototype

A new target and ion source unit has been developed at CERN-ISOLDE with the aim of delivering isobarically clean beams of short lived neutron-rich Cd and Zn. A quartz insert in the transfer line allows the trapping and the decay of alkali contaminants. This paper presents the design of the quartz transfer line. Alkali suppression is demonstrated with 80Rb and 114Cs. The yield of 8Li, 46K, 77Ga and 75Zn is presented.