Measurement of the ²⁰F half-life
classification
⚛️ nucl-ex
keywords
half-lifemeasurementresultsbeambeenbetacallsclarify
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The half-life of the $^{20}$F ground state has been measured using a radioactive beam implanted in a plastic scintillator and recording $\beta\gamma$ coincidences together with four CsI(Na) detectors. The result, $T_{1/2} = 11.0011(69)_{\rm stat}(30)_{\rm sys}$~s, is at variance by 17 combined standard deviations with the two most precise results. The present value revives the poor consistency of results for this half-life and calls for a new measurement, with a technique having different sources of systematic effects, to clarify the discrepancy.
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