A gas-jet coupled thermal ion source was installed in the isotope separator on line at the JAERI tandem accelerator. It was used for separation of neutron-rich isotopes produced in the reaction 238U(15 MeV-p, fission). The separation efficiencies of the whole system were measured to be 3.3% for 140Cs (T1/2 = 63.7 s), 2.0% for 144La (T1/2 = 40.8 s), 2.2% for 148Pr (T1/2 = 2.0 m), 1.2% for 156Pm (T1/2= 26.7 s) and 1.0% for 160Eu (T1/2 = 44 s). A long sticking time of La atoms on the ionizer surface gave a low efficiency of about 0.1% for 148La (T1/2 = 1.05 s). The first observation of a new isotope 166Tb was carried out using its monoxide ions from this ion source: T1/2(166Tb) = 21±6 s.
|Number of pages||5|
|Journal||Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|
|Publication status||Published - Jun 1 1996|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics