Finigan MAT 262
U.S.G.S. Thermal Ionization Mass Spectrometer with 9 collectors
and a secondary electron multiplier for ion counting

Contact information:
Dr. Bettina Wiegand
(650) 736-0752
bwiegand@pangea.stanford.edu
http://pangea.stanford.edu/~bwiegand

U.S.G.S. open file procedural manual for the measurment of uranium and thorium