Sonoma State University
Fall 2001
Dept. of Physics & Astronomy
John Dunning

Physics 384 X-ray Analysis

(two units) 1:00 - 3:50 Tuesday + two hours sample running time

Below is a tentative outline. The new edition of the text by Cullity opens possibilities. The new Jade 5 is very flexible, especially for geologic samples. I am trying for a guest lecture on protein crystallography as part of a field trip. Interesting unknowns flow into the University. Some will be incorporated to enrich this fall’s offering.

This course is an introduction to using X-ray powder diffraction (XRD) and X-ray fluorescence (EDX) as analytic techniques. XRD measures the crystal structure of compounds on an atomic scale. EDX measures the elemental composition. We have a fine theta-theta XRD instrument made by Rigaku, Jade 6+ software current through July 2001, and the International Center for Diffraction Data (ICDD) powder diffraction file of 112,000+ compounds. We will learn to use this powerful combination of hardware and software on a variety of analytic problems. At the end of the course you will be able to adapt X-ray diffraction and X-ray fluorescence to help you solve analytic problems of interest to you in your future career. In addition, synchrotron radiation as an X-ray source will be discussed.

Protein crystallography is an important field. A visit is anticipated to the Advanced Light Source in Berkeley where Synchrotron radiation is used to support dedicated protein beam lines. The latest Neutron Powder Diffraction examples from Los Alamos add to your repertoire.

Prerequisites:  Chemistry 115A and either Physics 209B or 216Physics 316 would be helpful, however you can quickly learn to run the X-ray machine.

Text:  Cullity, B. D. & Stock, S.R. , Elements of X-ray diffraction, Prentice Hall, 2001. This is a new revision, and the course will utilize several sections.

Demonstration spectra are included in the Jade software and exercises analyzing them are helpful.

A sequence of exercises is published by the ICDD as “Use of the Powder Diffraction File.”

Course Structure.  Schedule for the initial five weeks. The first two hours will be discussion-lecture. The second hour will be used to discuss the week’s experiment/exercise and for hands-on demonstrations. The schedule for the remaining weeks varies. You should schedule two additional hours of machine time each week for the first nine weeks for hands on work in groups of two.

The course features two exercises to get your started, three interesting one session experiments, and two good projects.

Grade:  This will be based upon: Two interesting projects: 20% each. The first is a written report of 3 pages maximum with additional pages allow for figures only. The second is a 15-minute oral presentation. Quiz at 6th week 15%. Three Instrument experiments listed below 10% each.

The Experiments

 

Please send comments, additions, corrections, and questions to
john.dunning@sonoma.edu
JRD
2001-09-06