9362108 Arlinghaus We propose to demonstrate the potential applicability of the sputter-initiated resonance ionization microprobe (SIRIMP) technique for geological studies by measuring Pb isotope ratios and U/Pb atomic ratios in geological samples relevant to geochronology. SIRIMP is based on the concept of resonance ionization of sputtered atoms and potentially offers several advantages over conventional high-resolution ion microprobe instruments. The most important of these are the high selectivity, significant reduction of isobaric interferences and matrix effects, and notable reduction in instrument cost. Preliminary research will be required in order (a) assess interferences due to unsuppressed ions created in the sputtering process (secondary ions) and those created by nonresonant photoionization and evaluate methods for their elimination, and (b) experimentally identify and evaluate resonant ionization schemes for Pb and U. Results from the proposed research will provide the basis for the development of new state- of-the-art analytical methods which would significantly advance analytical capabilities in earth sciences and promote new areas of research. These benefits could extend to other areas such as the semiconductor industry, the biomedical field, and environmental sciences.

Agency
National Science Foundation (NSF)
Institute
Division of Industrial Innovation and Partnerships (IIP)
Type
Standard Grant (Standard)
Application #
9362108
Program Officer
Michael F. Crowley
Project Start
Project End
Budget Start
1994-01-15
Budget End
1995-03-31
Support Year
Fiscal Year
1993
Total Cost
$64,994
Indirect Cost
Name
Atom Sciences Inc
Department
Type
DUNS #
City
Oak Ridge
State
TN
Country
United States
Zip Code
37830