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Precise half-life measurements for 38Ca and 39Ca

Abstract : The half-lives of 38Ca and 39Ca have been measured at ISOLDE of CERN. The REXTRAP facility was used to prepare ultra-clean samples of radioactive nuclei for precision decay spectroscopy. 38Ca is one of the T z = - 1 , 0+ 0+ -emitting nuclides used to determine the vector coupling constant of the weak interaction and the Vud quark-mixing matrix element. The result obtained, T 1/2 = 443.8(19) ms, is four times more precise than the average of previous measurements. For 39Ca , a half-life of T 1/2 = 860.7(10) ms is obtained, a result in agreement with the average value from the literature.
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Submitted on : Tuesday, June 29, 2010 - 2:28:36 PM
Last modification on : Saturday, December 26, 2020 - 1:46:05 PM

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Bertram Blank, A. Bey, I. Matea, J. Souin, L. Audirac, et al.. Precise half-life measurements for 38Ca and 39Ca. European Physical Journal A, EDP Sciences, 2010, 44, pp.363-372. ⟨10.1140/epja/i2010-10958-2⟩. ⟨in2p3-00496004⟩

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