The AMS measurement of 236U at CIRCE

Abstract

Accelerator mass spectrometry (AMS) is an ultrasensitive technique for measuring long-lived actinides, e.g., 236U, 237Np and Pu isotopes. In order to improve the detection limit for actinides abundance, and to increase the detection efficiency in actinides AMS measurement, a 16-strip silicon detector was used to identify actinides at the Center for Isotopic Research on Cultural and Environmental heritage in Caserta, Italy. The sensitivity of 236U/238U was 1 × 10−11 by special resolution and 5.0 × 10−12 by time resolution. The pulse height defect of 236U in an ion-implanted silicon detector in the low-energy range with 17.26 MeV is presented.