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MAT 209B S10 - PS1 - [quantify the degree of polarization...

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MAT 209B X-RAY DIFFRACTION SPRING 2010 Problem Set #1 Due: Thursday, April 15, 2010 12:30 PM 1. Absorption lengths Calculate the absorption coefficient and absorption length for the dominant reflections in the material used for your thesis work. Consider Cu K α and Mo K α radiation. 2. Polarization factors a. Warren problem 1.5 (both parts (a) and (b)) b. Derive the polarization factor and degree of polarization for a two-bounce monochromators for the (+n,-n) and (+n,+n) configurations and a four-bounce duMond- Hart-Bartels (+n,-n,-n,+n) monochromator.
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Unformatted text preview: [quantify the degree of polarization of the incident beam] Note: use Cu Cu K α radiation and Ge (220) reflections in the monochromator. 3. Hardware For the Panalytical and Rigaku diffractometers, describe the detectors: a. Are the detectors gas proportional counters? b. If yes to (a), then … i. What is the fill gas? ii. What is the bias on the detector? iii. What are the values of R and C for the detector circuit? iv. What are factors that limit the RC time constant for the total detector system? Please explain....
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