New measurement of the 238U decay constant with inductively coupled plasma mass spectrometry [New Measurement of the U-238 Decay Constant with Inductively Coupled Plasma Mass Spectrometry]

Parsons-Davis, Tashi; Wimpenny, Josh; Keller, C. Brenhin; Thomas, Keenan; Samperton, Kyle M.; Renne, Paul R.; Mundil, Roland; Moody, Ken; Knight, Kim; Kristo, Michael J.; Williams, Ross

doi:10.1007/s10967-018-6148-y

Title: New measurement of the ²³⁸U decay constant with inductively coupled plasma mass spectrometry [New Measurement of the U-238 Decay Constant with Inductively Coupled Plasma Mass Spectrometry]

Journal Article · Wed Aug 22 00:00:00 EDT 2018 · Journal of Radioanalytical and Nuclear Chemistry

DOI:https://doi.org/10.1007/s10967-018-6148-y· OSTI ID:1512607

^[1]; Wimpenny, Josh ^[1]; Keller, C. Brenhin ^[2]; Thomas, Keenan ^[1]; Samperton, Kyle M. ^[1]; Renne, Paul R. ^[2]; Mundil, Roland ^[3]; Moody, Ken ^[1]; Knight, Kim ^[1]; Kristo, Michael J. ^[1]; Williams, Ross ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. of California, Berkeley, CA (United States). Dept. of Earth and Planetary Science; Berkeley Geochronology Center, Berkeley, CA (United States)
Berkeley Geochronology Center, Berkeley, CA (United States)

The ²³⁸U decay constant (λ_U-238) is fundamental to radioisotope-based chronometry in the Earth and planetary sciences, yet only a single published λ_U-238 value (Jaffey et al. in Phys Rev C 4(5):1889–1906, 1971) is widely applied. We have determined λ_U-238 via the novel approach of measuring of ²³⁴Th ingrowth in high-purity 238U solutions, using isotope dilution mass spectrometry (ID-MS). The ²³⁴Th decay constant (λ_Th-234) was measured via decay counting with high-purity Ge (HPGe) $$\gamma$$ detectors. Preliminary results for λ_U-238 agree with the value determined by $$a$$-counting [1] within the elevated uncertainty of 0.462% (k = 2). Ongoing efforts to reproduce λ_U-238 with reduced experimental uncertainties will inform future conclusions.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1512607

Report Number(s):: LLNL-JRNL-752487; 938051

Journal Information:: Journal of Radioanalytical and Nuclear Chemistry, Vol. 318, Issue 1; ISSN 0236-5731

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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Title: New measurement of the 238U decay constant with inductively coupled plasma mass spectrometry [New Measurement of the U-238 Decay Constant with Inductively Coupled Plasma Mass Spectrometry]

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Title: New measurement of the ²³⁸U decay constant with inductively coupled plasma mass spectrometry [New Measurement of the U-238 Decay Constant with Inductively Coupled Plasma Mass Spectrometry]