Improving precision in resonance ionization mass spectrometry : influence of laser bandwidth in uranium isotope ratio measurements.

Journal Article · Tue Mar 01 00:00:00 EST 2011 · Anal. Chem.

DOI:https://doi.org/10.1021/ac102586v· OSTI ID:1015955

Isselhardt, B H; Savina, M R; Knight, K B; Pellin, M J; Hutcheon, I D; Prussin, S G ^[1]

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1. Materials Science Division

The use of broad bandwidth lasers with automated feedback control of wavelength was applied to the measurement of {sup 235}U/{sup 238}U ratios by resonance ionization mass spectrometry (RIMS) to decrease laser-induced isotopic fractionation. By broadening the bandwidth of the first laser in a three-color, three-photon ionization process from a bandwidth of 1.8 GHz to about 10 GHz, the variation in sequential relative isotope abundance measurements decreased from 10% to less than 0.5%. This procedure was demonstrated for the direct interrogation of uranium oxide targets with essentially no sample preparation.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC); DHS
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 1015955
• Report Number(s): ANL/MSD/JA-69987; TRN: US201112%%87
• Journal Information: Anal. Chem., Vol. 83, Issue Mar. 2011; ISSN 0003-2700
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ABUNDANCE
ACCURACY
FEEDBACK
FRACTIONATION
IONIZATION
LASERS
MASS SPECTROSCOPY
RESONANCE
SAMPLE PREPARATION
TARGETS
URANIUM ISOTOPES
URANIUM OXIDES
WAVELENGTHS