236U measurement with accelerator mass spectrometry at CIAE

236U is a long-lived radioactive isotope which is produced principally by thermal neutron capture on 235U. 236U may be potentially applied in geological research and nuclear safeguards. Accelerator mass spectrometry is presently the most sensitive technique for the measurement of 236U and a measurement method for long-lived heavy ion 236U has been developed. The set-up uses a dedicated injector and the newly proposed 208Pb 16 O 2 - molecular ions for the simulation of 236U ion transport. A sensitivity of lower than 10 −10 has been achieved for the isotopic ratio 236U/ 238U in present work.