Study of transitional nuclei at TRISTAN

At present there are six decay studies at TRISTAN in which the Oklahoma group has a major participation. These involve the decay of 99Sr, 145Ca, 147La, 99Rb, 101Sr and 101Y. These projects are in varying stages of completion and will be discussed individually in this paper. During the first third of this contract year (6/1/82--10/1/82) time at TRISTAN was devoted to ion-source and other facility development. Two new ion sources were developed and tested, a surface ionization source with a Ta ionizer and a FEBIAD-type plasma source. Both worked very well and with excellent reliability. In addition some work was done toward developing a surface ionization ion source for negative ions of Br and I, which are of special interest to the Oklahoma project. Further development of this source was postponed in favor of production runs with the other two, and a variety of new possibilities for future work have become available from these sources