AMS of heavy elements with an ECR ion source and the ATLAS linear accelerator

[摘要] Detection of heavy elements by accelerator mass spectrometry with the electron cyclotron resonance ion source, Argonne linear accelerator and fragment mass analyzer (ECRIS-ATLAS-FMA) system has been developed. The use of the ECR-ATLAS system for AMS of heavy elements has two interesting features: (i) the efficient production of high-charge state ions in the ECR source ensures the elimination of molecular ions at the source stage, a highly attractive feature for any mass-spectrometric use not exploited so far; (ii) the linear acceleration based on velocity matching and the beam transport system act as a powerful mass filter for background suppression. We have shown that our system reaches an abundance sensitivity of 1 x 10(-14) for Pb isotopes. The U-236 detection sensitivity is U-236/U greater than or similar to 1 x 10(-12), limited mainly by the ion source output. (C) 2000 Elsevier Science B.V. All rights reserved.

[发布日期] 2000-10-01

[效力级别]  Proceedings Paper