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Planetary X-ray fluorescence analogue laboratory experiments and an elemental abundance algorithm for C1XS

Weider, S.Z. and Swinyard, B.M. and Kellett, B.J. and Howe, C.J. and Joy, K.H. and Crawford, Ian A. and Gow, J.P.D. and Smith, D.R. (2011) Planetary X-ray fluorescence analogue laboratory experiments and an elemental abundance algorithm for C1XS. Planetary and Space Science 59 (13), pp. 1393-1407. ISSN 00320633.

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Official URL: http://dx.doi.org/10.1016/j.pss.2011.05.005

Abstract

We have conducted laboratory experiments as an analogue to planetary XRF (X-ray fluorescence) missions in order to investigate the role of changing incidence (and phase) angle geometry and sample grain-size on the intensity of XRF from regolith-like samples. Our data provide evidence of a grain-size effect, where XRF line intensity decreases with increasing sample grain-size, as well as an almost ubiquitous increase in XRF line intensity above incidence angles of ~60°. Data from a lunar regolith simulant are also used to test the accuracy of an XRF abundance algorithm developed at the Rutherford Appleton Laboratory (RAL), which is used to estimate the major element abundance of the lunar surface from C1XS (Chandrayaan-1 X-ray Spectrometer) XRF data. In ideal situations (i.e., when the input spectrum is well defined and the XRF spectrum has a sufficient signal to noise ratio) the algorithm can recover a known rock composition to within 1.0 elemental wt. % (1 σ).

Item Type: Article
Additional Information: X-ray fluorescence (XRF) spectroscopy, planetary analogues, Moon, Mercury, zsteroids - surface, Regolith, Chandrayaan-1
School or Research Centre: Birkbeck Schools and Research Centres > School of Science > Earth and Planetary Sciences
Depositing User: Administrator
Date Deposited: 23 May 2011 08:37
Last Modified: 17 Apr 2013 12:20
URI: http://eprints.bbk.ac.uk/id/eprint/3361

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