Dawid Szymanowski & Blair Schoene
Department of Geosciences, Princeton University; email@example.com; firstname.lastname@example.org
- ATONA [aA (10-18 A) to nA (10-9 A)] is a new Faraday cup signal amplifying technology for Isotopx Phoenix thermal ionisation mass spectrometers (TIMS)
- Main advantages for TIMS U–Pb geochronology (compared to conventional ion counting with peak-hopping):
- Better precision and accuracy for all but the smallest/youngest samples
- Shorter analysis time
- We present the results of our tests of the new ATONA system at Princeton University, the conditions in which it is advantageous to use it, and optimised Pb and U analysis methods.
U–Pb methods and first results
Pb: 2-cycle FaraDaly routine with 204Pb (30s) alternated with 205Pb (10s) in the axial Daly photomultiplier (PM) to correct for Faraday–Daly gain.
UO2: static Faraday routine allowing for simultaneous measurement of 18O/16O and UO2 interference corrections using mass 269
Baseline: single at start, 300s at each half-mass
ATONA vs (Daly) Ion Counting
Download Technical Note
Download the complete Technical Note: U-Pb TIMS Geochronology using ATONA® Amplifiers