Experimental validation of XRF inversion code for Chandrayaan-1

P. S. Athiray, M. Sudhakar, M. K. Tiwari, S. Narendranath, G. S. Lodha, S. K. Deb, P. Sreekumar, S. K. Dash

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


We have developed an algorithm (x2abundance) to derive the lunar surface chemistry from X-ray fluorescence (XRF) data for the Chandrayaan-1 X-ray Spectrometer (CIXS) experiment. The algorithm converts the observed XRF line fluxes to elemental abundances with uncertainties. We validated the algorithm in the laboratory using high Z elements (20< Z <30) published in Athiray et al. (2013). In this paper, we complete the exercise of validation using samples containing low Z elements, which are also analogous to the lunar surface composition (ie., contains major elements between 11 <Z <30). The paper summarizes results from XRF experiments performed on Lunar simulant (JSC-1A) and anorthosite using a synchrotron beam excitation. We also discuss results from the validation of x2abundance using Monte Carlo simulation (GEANT4 XRF simulation).

Original languageEnglish (US)
Pages (from-to)183-187
Number of pages5
JournalPlanetary and Space Science
StatePublished - Dec 2013


  • Chandrayaan-1
  • Fundamental parameter C1XS
  • Lunar chemistry
  • X-ray Fluorescence (XRF)


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