Sub-epsilon natural 234U/238U measurements refine the 234U half-life and U-Th geochronology
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F25%3A10505720" target="_blank" >RIV/00216208:11310/25:10505720 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=bm.TnubklT" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=bm.TnubklT</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1126/sciadv.adu8117" target="_blank" >10.1126/sciadv.adu8117</a>
Alternative languages
Result language
angličtina
Original language name
Sub-epsilon natural 234U/238U measurements refine the 234U half-life and U-Th geochronology
Original language description
(234)U/(238)U ratios are used across various fields in Earth science, but their measurement is highly challenging due to the four orders of magnitude difference in isotope abundance between (234)U and (238)U. Here, we develop refined techniques for accurately and precisely measuring (234)U/(238)U using multicollector inductively coupled plasma mass spectrometry, providing a reproducibility of +/- 0.08 per mil (2σ). At this sub-epsilon precision level, the half-life of (234)U is refined to 245,670 +/- 260 years. For U-Th geochronology, systematic uncertainties from decay constants largely cancel, effectively reducing the uncertainty in the (234)U half-life to similar to +/- 25 years. This improved measurement precision consequently reduces total 2σ age uncertainties to +/- 3 thousand years (kyr) at similar to 600 thousand years ago (ka) and +/- 6 kyr at similar to 700 ka, a substantial improvement over earlier methods with uncertainties of tens of thousands of years.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10505 - Geology
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Science Advances
ISSN
2375-2548
e-ISSN
2375-2548
Volume of the periodical
11
Issue of the periodical within the volume
40
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
eadu8117
UT code for WoS article
001586102600032
EID of the result in the Scopus database
2-s2.0-105017666470