Abstract
Abstract Ratios of separation efficiencies of isotopes with different halflives are measured by a new method. Two sources of mass-separated samples, synchronized to a pulsed production of atoms in the target, are collected in the on-line separator, one while the production is turned on and one while it is off. From the ratio of the two source strengths as a function of the frequency of the production cycle, release times and relative separation efficiencies can be extracted. The release of iodine, mercury and polonium from an arc discharge (FEBIAD) ion source and cesium from a thermal ion source is investigated and relative separation efficiencies for isotopes with halflives in the second or one minute range are deduced.
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