Please use this identifier to cite or link to this item:
|Title:||Comparison of 41Ca analysis on 0.5 MV and 5 MV-AMS systems|
Accelerator Mass Spectrometry
|Citation:||Schulze-König, T., Maden, C., Denk, E., Freeman, S.P.H.T., Stocker, M., Suter, M., Synal, H.-A., Walczyk, T. (2010-04). Comparison of 41Ca analysis on 0.5 MV and 5 MV-AMS systems. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms 268 (7-8) : 752-755. ScholarBank@NUS Repository. https://doi.org/10.1016/j.nimb.2009.10.022|
|Abstract:||A comparative study was made between the compact AMS system at the PSI/ETH Laboratory of Ion Beam Physics in Zurich with 0.5 MV terminal voltage and the 5 MV-AMS system at the Scottish Universities Environmental Research Centre (SUERC), Glasgow. Overall 34 urinary samples with 41Ca/40Ca ratios in the range from 4 × 10-11 to 3 × 10-10 were processed to CaF2 and aliquots of the same material were measured on both instruments. Measurements on the compact AMS system were performed in charge state 3+ achieving a transmission of 4% at 1.7 MeV beam energy. Under these conditions a suppression of the interference 41K is virtually impossible. However, samples with an excess of potassium can be identified by a shift of the 41Ca/41K peak in the ΔE - E histogram of the gas ionization detector employed and a criterion for data rejection can be defined. An overall precision of ∼4% and a 41Ca/40Ca background level of 5 × 10-12 have been reached. For studies with higher demands on the detection limit AMS systems like the one at SUERC are attractive: in charge state 5+ and using a gas stripper beam energy of 27 MeV, a transmission of 5%, a 41K suppression factor of ∼500 and a 41Ca/40Ca background level of 3 × 10-14 are achieved. We demonstrate that both systems are well suited for large-scale 41Ca biomedical applications. © 2009 Elsevier B.V. All rights reserved.|
|Source Title:||Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jul 20, 2018
WEB OF SCIENCETM
checked on Jun 5, 2018
checked on Jul 20, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.