Relative formation probabilities for fluoride and oxyfluoride anions of U, Np,Pu and Am in accelerator mass spectrometry measurements at VERA

Author(s)

A. Wiederin, M. Kern, K. Hain, M. Martschini, A. Sakaguchi, P. Steier, A. Yokoyama, R. Golser

Abstract

Fluoride molecular anions have emerged as a potential alternative to oxides for the analysis of actinides in AMS. Research at the Vienna Environmental Research Accelerator (VERA) has focused on mixing samples prepared in an Fe

₂O

₃ matrix with PbF

₂ for in situ fluoridation during the sputter process. The relative formation probabilities for a range of (oxy-)fluoride molecular anions of uranium, neptunium, plutonium, and americium have been found to be characteristic for each of the actinides investigated. These data can help to identify isobaric interference for the mentioned actinides. A first application is monitoring of the

²³⁶U co-production with

²³⁶Np during Th irradiation. Extracting these actinides in the form of tetrafluoride anions allows the suppression of U by an order of magnitude relative to Np.

Organisation(s)

Isotope Physics

External organisation(s)

University of Tsukuba, Kanazawa University

Journal

Nuclear Instruments & Methods in Physics Research. Section B. Beam Interactions with Materials and Atoms

Volume

528

Pages

40-44

No. of pages

5

ISSN

0168-583X

DOI

https://doi.org/10.1016/j.nimb.2022.07.011

Publication date

10-2022

Peer reviewed

Yes

Austrian Fields of Science 2012

103014 Nuclear physics

Keywords

ASJC Scopus subject areas

Nuclear and High Energy Physics, Instrumentation

Portal url

https://ucris.univie.ac.at/portal/en/publications/relative-formation-probabilities-for-fluoride-and-oxyfluoride-anions-of-u-nppu-and-am-in-accelerator-mass-spectrometry-measurements-at-vera(05030763-c737-4b1e-ba8c-4c7cc912bb84).html