No abstract

No abstract

The long-lived isotope 53 Mn cosmogenically produced in situ is a very useful indicator for geochronological dating. A new 53 Mn accelerator-mass-spectrometry (AMS) measurement method is developed based on the HI-13 Tandem Accelerator and ∆E-Q3D detection system at China Institute of Atomic Energy. The performance of 53 Cr isobar separation and suppression is tested by a series of 53 Mn standards and commercial MnO samples. The results show that the ∆E-Q3D detection system brought about an overall suppression factor of more than 10 7 for the interfering isobar 53 Cr.

No abstract