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Proceedings Paper

Comparison of resonance ionization mass spectrometry systems for the determination of 135Cs/137Cs isotope ratios
Author(s): Leticia S. Pibida; C. A. McMahon; Wilfried Nortershauser; Bruce A. Bushaw
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Paper Abstract

The performance of the Resonance Ionization Mass Spectrometry (RIMS) system at the National Institute of Standards and Technology (NIST) has been compared to a similar system at Pacific Northwest National Laboratory (PNNL). Efficiency and selectivity measurements were performed with both systems and compared to conventional thermal ionization mass spectrometry (TIMS). Determination of the 135Cs / 137Cs ratio was performed using single-resonance excitation 6s 2S1/2 (F equals 4) to 6p 2P3/2 (F equals 5) with an extended cavity diode laser followed by photoionization with the 488 nm line of an argon ion laser. Optical selectivity of more than 2 orders of magnitude against stable 133Cs was attained for 135Cs and 137Cs for both systems with an overall selectivity of 109 for the PNNL system and 108 for the NIST system. Overall efficiencies of 2x10-6 and 5x10-7 were measured for the PNNL and NIST systems respectively. Measurements to determine the chronological age of a nuclear burn-up sample have been performed using both RIMS systems as well as TIMS.

Paper Details

Date Published: 28 March 2002
PDF: 10 pages
Proc. SPIE 4634, Methods for Ultrasensitive Detection II, (28 March 2002); doi: 10.1117/12.463833
Show Author Affiliations
Leticia S. Pibida, National Institute of Standards and Technology (United States)
C. A. McMahon, National Institute of Standards and Technology (United States)
Wilfried Nortershauser, Pacific Northwest National Lab. (Germany)
Bruce A. Bushaw, Pacific Northwest National Lab. (United States)


Published in SPIE Proceedings Vol. 4634:
Methods for Ultrasensitive Detection II
Charles W. Wilkerson, Editor(s)

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