Further study on highly sensitive AMS measurement of 53Mn

The AMS facility at China Institute of Atomic Energy has been equipped with a ΔE-Q3D detection system for the measurements of 53Mn. While the sample material of MnO2 and the extraction ions of MnO− were used previously in AMS measurement of 53Mn with fairly good results, a method has recently been developed with the extraction of MnF− from ion source using MnF2 and MnO2 + PbF2 as sample materials. As a result, a sensitivity of 10−14 (53Mn/Mn) has been achieved. Compared with the original MnO−/MnO2 approach, the method of MnF− extraction, combined with ΔE-Q3D detection technique, demonstrated an improved sensitivity for AMS measurement of 53Mn.