# A new method of measuring the half-life of ^{10}C

Source: [A new method of measuring the half-life of ^{10}C](<https://www.sota2.com/research/paper/68fa28c61e209131ce82e85a>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-28T13:52:56.617Z

Authors: K. K. H. Leung

Published: 2009-11-27T18:22:42.000Z

## Abstract

A new measurement of the half-life of the positron emitter 10C has been made. The 10C decay belongs to the set of superallowed 0+ -\> 0+ beta-decays whose Ft values offer stringent tests of the Conserved Vector Current (CVC) hypothesis and which can be used in calculating \|Vud\|, the largest element of the Cabibbo-Kobayashi-Maskawa (CKM) quark mixing matrix of the Standard Model. The experimental method used four plastic scintillator detectors in a 3-fold coincidence mode in order to detect the unique 2x511keV+718keV gamma-ray decay signature of 10C. The half-life values obtained from the data were strongly dependent on the detector count rates, but a final value of 19.303 +/- 0.013 s was determined by extrapolating the dependence to zero count rate. This study highlights the significance of systematic errors due to high count rates in precision half-life experiments and raises doubts about both the two previously accepted values of the half-life of 10C.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/0911.5325>)

[PDF](<https://arxiv.org/pdf/0911.5325.pdf>)