Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.nimb.2009.10.022
Title: Comparison of 41Ca analysis on 0.5 MV and 5 MV-AMS systems
Authors: Schulze-König, T.
Maden, C.
Denk, E.
Freeman, S.P.H.T.
Stocker, M.
Suter, M.
Synal, H.-A.
Walczyk, T. 
Keywords: 41Ca
Accelerator Mass Spectrometry
Biomedical AMS
Ca41
Compact AMS
Issue Date: Apr-2010
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
URI: http://scholarbank.nus.edu.sg/handle/10635/93335
ISSN: 0168583X
DOI: 10.1016/j.nimb.2009.10.022
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

15
checked on Dec 10, 2018

WEB OF SCIENCETM
Citations

14
checked on Dec 10, 2018

Page view(s)

45
checked on Nov 2, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.