WiscSIMS - The Wisconsin Secondary Ion Mass Spectrometer/ Ion Microprobe Laboratory
University of Wisconsin - Madison
MASS SPECTROMETERS - Stable isotopes
MASS SPECTROMETERS - SIMS, Secondary ion mass spectroscopy, or Dynamic SIMS
MASS SPECTROMETERS - Ion Probe (e.g., SHRIMP or equivalent)
CAMECA IMS-1280, large radius multi-collector ion microprobe
The most common applications are analysis of oxygen or carbon isotope ratios, in situ, with a 10 micron spot.
Conditions for Use:
Visitors are invited to work in the lab to work with lab personnel Visitors are invited to work in the lab to design and do the work yourself
NSF-funded projects pay a subsidized fee of $1440 per 12-hour day for days of analysis. For measurement of oxygen isotope ratio (18/16) with a 10 micron spot, ~110 spot-analyses are made on samples and 40 analyses on standards in 12 hours.
Projects that are funded by NSF receive priority.
Samples must be 25mm in diameter (epoxy mount, rock chip, or thin section), polished to a smooth, low relief surface with appropriate standards mounted in the center. See the WiscSIMS web site and consult with WiscSIMS staff.
Standard Collections/Lab Blanks:
See the WiscSIMS web site and:
Valley JW and Kita NT (2009) In situ Oxygen Isotope Geochemistry by Ion Microprobe, In: Fayek M. (ed) MAC Short Course: Secondary Ion Mass Spectrometry in the Earth Sciences, v 41, 19-63
Data reduction is done on-line during analysis with CAMECA software and Excel.
Graduate student research projects are invited
Support provided by:
The WiscSIMS Lab is partially funded as a National Facility for in situ stable isotope analysis by NSF-EAR-IF.