Initial Publication Date: August 13, 2012
Electron Microprobe Laboratory
University of Oklahoma
http://ors.ou.edu/Microprobe/OUEMPLhome.asp
Contact Information
Dr. George B. Morgan VI
405 325 2642
gmorgan@ou.edu
Norman
OKLAHOMA
Instrument Type
Electron Microbeam: SEM scanning electron microscope
Electron Microbeam: EDS energy dispersive spectrometer
Electron Microbeam: CL cathodoluminescence detector +/- spectrometer
Electron Microbeam: EMPA electron microprobe; wavelength dispersive spectrometer
Electron Microbeam: EDS energy dispersive spectrometer
Electron Microbeam: CL cathodoluminescence detector +/- spectrometer
Electron Microbeam: EMPA electron microprobe; wavelength dispersive spectrometer
Cameca SX50
Application:
- Surface analysis
- Whole-rock analysis (major and trace element)
- Micro-imaging
Typical Use:
Wavelength-dispersive diffraction spectrometry of all elements heavier than Be (beryllium). Spatial resolution typical of tungsten filament sources. High-performance cathodoluminescence (CL) spectrophotometer.
Conditions for Use:
- Submitted samples will be analyzed on a contract basis (i.e. lab personnel will do the work)
- Visitors are invited to work in the lab to work with lab personnel
- All analyses are performed by George Morgan except for OU personnel who have completed Dr. Morgan's microprobe training course.
User Fees:
US$40/hr or US$400/day (24 hr) for non-OU academic users and Federal or state governments.
US$100/hr or US$1000/day (24 hr) for all others.
Prep time charged as commensurate with time and materials used
US$100/hr or US$1000/day (24 hr) for all others.
Prep time charged as commensurate with time and materials used
Instrument Priorities:
Work is scheduled as requested on a first-available basis
Remote Use:
no
Sample Preparation:
We accommodate standard 1" rounds, standard 0.25" dia brass mounts, standard 22x44mm thin sections, and other samples as shuttles permit.
Standard Collections/Lab Blanks:
The laboratory maintains a broad suite of commercial and in-house standards including metals, minerals, and glasses.
Software:
On-line data acquisition through SAMx IDFIX PC-based automation providing complete integration with WDS analytical and digital imaging systems.
Images for all signal types (BSEI, SEI, CL, ABS, XR-EDXA, XR-WDS) are acquired digitally with SAMx software that supports storage in a large variety of file formats that includes 8 to 24-bit TIF, JPG, GIF, Bitmap, and WMF among others. Image areas ≤ 1.6 x 1.6 mm are acquired by beam-scanning, and the acquisition software permits multiple sweeps/passes of the beam on each image, multiple reads of each pixel on each sweep, and a user-selectable dwell time between pixels (useful for allowing decay of emission between pixels for cathodoluminescence imaging). Larger area imaging/mapping can be performed by scanning the stage under a fixed beam, or by mosaic of smaller areas acquired by beam scanning.
Off-line image analysis through IMAGEPRO PLUS, data analysis via MS Excel for PC
Images for all signal types (BSEI, SEI, CL, ABS, XR-EDXA, XR-WDS) are acquired digitally with SAMx software that supports storage in a large variety of file formats that includes 8 to 24-bit TIF, JPG, GIF, Bitmap, and WMF among others. Image areas ≤ 1.6 x 1.6 mm are acquired by beam-scanning, and the acquisition software permits multiple sweeps/passes of the beam on each image, multiple reads of each pixel on each sweep, and a user-selectable dwell time between pixels (useful for allowing decay of emission between pixels for cathodoluminescence imaging). Larger area imaging/mapping can be performed by scanning the stage under a fixed beam, or by mosaic of smaller areas acquired by beam scanning.
Off-line image analysis through IMAGEPRO PLUS, data analysis via MS Excel for PC
Educational Use:
- Class demonstrations are available for undergraduates
- Undergraduate student research projects are invited
- Graduate student research projects are invited
Support provided by:
The Electron Microprobe Laboratory at the University of Oklahoma was established by U.S. Department of Energy grant DE-FG22-87FE1146, with continuing support from the Office of the Vice President of Research at the University of Oklahoma, and through National Science Foundation Grants EAR-9404658, EAR-9906029, and EAR-0649001.
