The Measurement Technology Method of ²³⁹Pu with the Developed Compact AMS System

With the technology improvement, a compact Accelerator Mass Spectrometry (AMS) device has been developed by China Institute of Atomic Energy on the basis of the low-energy AMS device developed earlier. The measurement method of ²³⁹Pu was investigated with newly established compact AMS device. In order to establish the ²³⁹Pu transport with the AMS system, the relationships of the transmission efficiency with the type of stripping gas, the selection of charge states, the thickness of stripping gas and the pre-acceleration voltage were systematically studied by using ²³⁸U, and then the optimized conditions of ²³⁹Pu measurement with the AMS system is established. It is verified that the linear R² of the device is 0.999 7 and the detection limit of ²³⁹Pu is 0.1 fg through a series of standard samples and blank samples. It lays a foundation for the wide application of ²³⁹Pu in environmental and geological fields.