New delayed neutron precursors measured at TRISTAN

Recent development of reliable, high intensity ion sources for the TRISTAN on-line mass separator facility has greatly expanded the number of very neutron-rich fission products available. Half-lives and delayed neutron emission probabilities are being measured for these nuclides with a high efficiency neutron counter. During the past year, previously unknown P/sub n/ values have been measured for 11 precursors: /sup 75/Cu, /sup 100/Rb, /sup 100-102/Sr, /sup 100-102/Y, /sup 148/Ba, and /sup 149/La. 9 refs., 1 fig., 1 tab.