Cl can interfere with Al3+ AMS but B need not matter to Be measurement

Xu, S., Freeman, S.P.H.T. , Sanderson, D. , Shanks, R. and Wilcken, K.M. (2013) Cl can interfere with Al3+ AMS but B need not matter to Be measurement. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 294, pp. 403-405. (doi:10.1016/j.nimb.2012.01.045)

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Publisher's URL: http://dx.doi.org/10.1016/j.nimb.2012.01.045

Abstract

Al AMS can be subject to particle detector ion interference despite effective 26Mg suppression and molecule digestion. Using our thinnest-yet 30 nm SiN membrane detector window to best separate four signals close to the 16 MeV 26Al3+ ions we identify 35Cl4+ interference consistent with molecular-dissociation before the accelerator, in addition to 9Be1+ and 17O2+ ions. The problem is likely generic and possibly applies to other charge-states too. Separately we have measured highly borated beryl 10Be blank samples to confirm the insensitivity to 10B3+ interference of our two different detector arrangement for 10Be3+ AMS. Be AMS correction for B is unnecessary, and is also invariant of 9Be beam current.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Sanderson, Professor David and Wilcken, Mr Klaus and Shanks, Dr Richard and Xu, Dr Sheng and Freeman, Professor Stewart
Authors: Xu, S., Freeman, S.P.H.T., Sanderson, D., Shanks, R., and Wilcken, K.M.
College/School:College of Science and Engineering > Scottish Universities Environmental Research Centre
Journal Name:Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
ISSN:0168-583X
Published Online:18 February 2012

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