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In-situ cosmogenic 14C analysis at ETH Zürich: Characterization and performance of a new extraction system.
- Source :
-
Nuclear Instruments & Methods in Physics Research Section B . Oct2019, Vol. 457, p30-36. 7p. - Publication Year :
- 2019
-
Abstract
- We present a new in-situ cosmogenic 14C extraction system developed at ETH Zürich. This system quantitatively extracts 14C produced in quartz by cosmic rays using a high temperature extraction procedure. A key improvement of the new extraction system is the implementation of largely automated sequences, CO 2 transport in a He flow and the addition of a "dead" CO 2 carrier gas, which ensure highly reproducible operation while limiting the required operator attendance. Intercomparison quartz samples were routinely measured over a year of operation and yield 14C concentrations of 7.27 (±0.03) · 105 at/g quartz for CRONUS-A (n = 7) and 1.24 (±0.17) · 104 at/g quartz for CRONUS-N (n = 4). The excellent performance of the new system is highlighted by low procedural blanks of ca. 3 · 104 14C atoms and coefficients of variation for the CRONUS-A and CRONUS-N analyses of only 0.4% and 14% respectively. [ABSTRACT FROM AUTHOR]
- Subjects :
- *COSMIC rays
*CARRIER gas
*QUARTZ
*COSMOGENIC nuclides
*HIGH temperatures
Subjects
Details
- Language :
- English
- ISSN :
- 0168583X
- Volume :
- 457
- Database :
- Academic Search Index
- Journal :
- Nuclear Instruments & Methods in Physics Research Section B
- Publication Type :
- Academic Journal
- Accession number :
- 137890033
- Full Text :
- https://doi.org/10.1016/j.nimb.2019.07.028