Author/Authors :
Ichikawa، نويسنده , , S and Asai، نويسنده , , M and Tsukada، نويسنده , , K and Osa، نويسنده , , A and Ikuta، نويسنده , , T and Shinohara، نويسنده , , N and Iimura، نويسنده , , H and Nagame، نويسنده , , Y and Hatsukawa، نويسنده , , Y and Nishinaka، نويسنده , , I and Kawade، نويسنده , , K and Yamamoto، نويسنده , , H and Shibata، نويسنده , , M and Kojima، نويسنده , , Y، نويسنده ,
Abstract :
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 (T12 = 63.7 s), 2.0% for 144La (T12 = 40.8 s), 2.2% for 148Pr (T12 = 2.0 m), 1.2% for 156Pm (T12 = 26.7 s) and 1.0% for 160Eu (T12 = 44 s). A long sticking time of La atoms on the ionizer surface gave a low efficiency of about 0.1% for 148La (T12 = 1.05 s). The first observation of a new isotope 166Tb was carried out using its monoxide ions from this ion source: T12(166Tb) = 21±6 s.
