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Bailey, K.; Chen, C. Y.; Du, Xixun; Li, Y. M.; Lu, Zheng‐Tian; O’Connor, Thomas P.; Young, Linda

doi:10.1023/a:1012698508113

Cited by 3 publications

(1 citation statement)

References 55 publications

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“…Other optical methods employed for the trace detection of 85j< are Resonance Ionization Spectroscopy (RIS) [5,6] and Atom Trapping (ATTA) [7] in a MOT trap. While RIS requires extensive isotope enrichment, it also has a low duty cycle.…”

Section: Introductionmentioning

confidence: 99%

High-efficiency ultra trace detection of⁸⁵Kr

2002

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We have developed a novel version of collinear fast beam laser spectroscopy based on particle detection. The sample to be analyzed is loaded into an ion source and a mass separated fast ion beam is produced. In it we can detect with high efficiency the various krypton isotopes, and in particular the long lived rare isotope 85j by observing the optical hyperfine structure spectrum. The technique utilizes cascade two-step excitation to pump metastable krypton atoms to a high-lying Rydberg level. The metastable atom level is effectively populated from the Kr ion beam by a near resonance charge exchange reaction with rubidium vapor. Thereupon the Rydberg atoms are field-ionized and the resulting signal ions, which have been at resonance with two laser frequencies, are detected. The following transitions are used in the two-step excitation process: 5s2 [3/2] 2 -."5p2 [5/2]3 -29d[7/2J4. . The technique has been successfully applied to all the stable krypton isotopes, and to 85j< but not yet to 81j< Afterthe Kr ions are emitted from the ion source the overall detection efficiency is to date 8%. The selectivity is at the one part in 1010 level and the sensitivity at a few hundred ions/s. Obvious further improvements are possible and are outlined. A similar excitation scheme can also be applied to the other noble gases including radon and to their rare isotopes.

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Section: Introductionmentioning

confidence: 99%

High-efficiency ultra trace detection of⁸⁵Kr

2002

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High-efficiency ultra-trace detection of 85Kr

Li¹,

Schuessler²

2003

Exotic Nuclei and Atomic Masses

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Ultra-trace analysis of 41Ca in urine by accelerator mass spectrometry: An inter-laboratory comparison

Jackson

Hillegonds

Muzikar

et al. 2013

Nuclear Instruments and Methods in Physics Research Section B:

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A 41Ca interlaboratory comparison between Lawrence Livermore National Laboratory (LLNL) and the Purdue Rare Isotope Laboratory (PRIME Lab) has been completed. Analysis of the ratios assayed by accelerator mass spectrometry (AMS) shows that there is no statistically significant difference in the ratios. Further, Bayesian analysis shows that the uncertainties reported by both facilities are correct with the possibility of a slight under-estimation by one laboratory. Finally, the chemistry procedures used by the two facilities to produce CaF2 for the cesium sputter ion source are robust and don't yield any significant differences in the final result.

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Cited by 3 publications

References 55 publications

High-efficiency ultra trace detection of⁸⁵Kr

High-efficiency ultra trace detection of⁸⁵Kr

High-efficiency ultra-trace detection of 85Kr

Ultra-trace analysis of 41Ca in urine by accelerator mass spectrometry: An inter-laboratory comparison

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Cited by 3 publications

References 55 publications

High-efficiency ultra trace detection of85Kr

High-efficiency ultra trace detection of85Kr

High-efficiency ultra-trace detection of 85Kr

Ultra-trace analysis of 41Ca in urine by accelerator mass spectrometry: An inter-laboratory comparison

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High-efficiency ultra trace detection of⁸⁵Kr

High-efficiency ultra trace detection of⁸⁵Kr