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Ultrasensitive isotope trace analyses with a magneto-optical trap
1Physics Division, and Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA.
Science (New York, N.Y.)
|November 5, 1999
Summary
Laser manipulation precisely counts rare krypton isotopes in natural gas. This advanced isotope trace analysis offers high sensitivity and avoids contamination for diverse applications.
Area of Science:
- Atomic Physics
- Analytical Chemistry
- Isotope Ratio Mass Spectrometry
Background:
- Accurate quantification of rare isotopes is crucial for various scientific and industrial applications.
- Traditional methods for isotope trace analysis can be limited by sensitivity and potential contamination issues.
Purpose of the Study:
- To demonstrate a novel method for counting individual atoms of specific isotopes using laser manipulation.
- To assess the feasibility of this technique for ultra-trace isotope analysis of krypton-85 and krypton-81.
Main Methods:
- Utilizing laser manipulation techniques to isolate and count individual neutral atoms.
- Analyzing natural krypton gas samples to determine isotopic abundances.
- Measuring detection efficiency of the laser manipulation system.
Main Results:
- Successfully counted individual krypton-85 and krypton-81 atoms at abundances as low as 10(-11) and 10(-13), respectively.
- Demonstrated a detection efficiency of 1 x 10(-7).
- The method proved to be free from contamination by other isotopes and elements.
Conclusions:
- Laser manipulation provides a highly sensitive and selective method for isotope trace analysis.
- The technique has broad applicability for various isotope tracers and applications.
- Potential for significant improvements in detection efficiency with system enhancements.
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