Empirical investigations of compton and rayleigh scattering in apxs spectra

Autor: Lee, May
Přispěvatelé: Gellert, Ralf
Jazyk: angličtina
Rok vydání: 2010
Předmět:
Astrophysics::High Energy Astrophysical Phenomena
Compton and Rayleigh scattering peaks can be used to quantify the content of low atomic number elements that do not generate detectable characteristic peaks in an X-ray spectrum. Here
this method is used for quantifying water content in spectra obtained by the Alpha-particle X-ray spectrometers (APXS) on the Mars Exploration Rovers (MER). As part of the analysis
a Monte Carlo simulation program is needed to determine the Compton to Rayleigh scattering (C/R) ratio based on sample content. Improvements were made to this simulation program and the new version was used to determine the most important parameters that influence the C/R ratio. Analyzing spectra from MERB
the Endurance Crater and Victoria Crater region were estimated to have 13±4% and 18±4% water repectively. A new extrapolation method was also developed that reduces the number of simulations required to arrive at a water estimate for any given MER spectrum
Popis: Compton and Rayleigh scattering peaks quantify content low atomic number elements water content Alpha-particle X-ray spectrometers Mars Exploration Rovers
Databáze: OpenAIRE
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