Publikationen

Positive-ion accelerator mass spectrometry at ATLAS: Peaks and pits

Autor(en)
Michael Paul, Richard C. Pardo, Philippe Collon, Walter Kutschera, K. Ernst Rehm, Robert Scott, Richard C. Vondrasek
Abstrakt

Electron Cyclotron Resonance (ECR) ion sources and the production of multiple-charge positive ions with high efficiency in combination with a heavy-ion accelerator have opened the way to an alternative and complementary version of accelerator mass spectrometry (AMS). A notable strength of positive-ion over traditional AMS is the capability of ultra-high sensitivity detection of radioactive isotopes of noble gases, in particular 37Ar (t1/2 = 35 d) and 39Ar (269 y). The complete dissociation of molecular ions in the ECR and in particular of hydride ions of neighboring stable isotopes results in superior isotopic separation. However, the use of high charge states, necessary for acceleration to high energy, entails the existence of severe transmission degeneracies with stable ions having nearly equal mass-to-charge ratios, in addition to that of stable isobaric ions. Separation or discrimination of these parasitic ions require powerful and sophisticated dispersive systems at detection stage. We review here work performed and in progress at the ATLAS facility of Argonne National Laboratory (ANL) where an ECR ion source, a Radio-Frequency Quadrupole (RFQ), a superconducting linear accelerator and a Gas-Filled Magnet (GFM) are used as an AMS setup.

Organisation(en)
Isotopenphysik
Externe Organisation(en)
Hebrew University Jerusalem, Argonne National Laboratory, University of Notre Dame
Journal
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Band
456
Seiten
222-229
Anzahl der Seiten
8
ISSN
0168-583X
DOI
https://doi.org/10.1016/j.nimb.2019.04.003
Publikationsdatum
10-2019
Peer-reviewed
Ja
ÖFOS 2012
103014 Kernphysik
Schlagwörter
ASJC Scopus Sachgebiete
Nuclear and High Energy Physics, Instrumentation
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/positiveion-accelerator-mass-spectrometry-at-atlas-peaks-and-pits(e4db6186-0043-438b-a76b-bec57d82a106).html