Abstract:
The 1/2+ ground state and a 11/2- isomer of very neutron-deficient isotope 143Dy were produced by irradiation of an enriched target of 106Cd with 40Ca and studied by using a helium-jet fast tape-transport system in combination with proton-γ, X-γ and γ-γ coincidence measurements. A simple ( EC + β+) decay scheme of 143mDy with a half-life of 3.0(3) s and a tentative ( EC + β+) decay scheme of 143gDy with a half-life of 5.6(10) s are proposed. As a by-product, the 347- and 545-keV γ transitions in 138Sm following the β-delayed proton emission of 139Gd decay and the 323-keV γ transition in 139Eu following the β-delayed proton emission of 140Tb decay could be observed for the first time.
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Received: 20 August 2002 / Accepted: 28 October 2002 / Published online: 11 February 2003
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ID="a"e-mail: xsw@ns.lzb.ac.cn
Communicated by D. Schwalm
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Xu, SW., Xie, YX., Li, ZK. et al. (EC + β+) decays of the 11/2- isomer and 1/2+ ground state of 143Dy. Eur Phys J A 16, 347–351 (2003). https://doi.org/10.1140/epja/i2002-10102-1
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DOI: https://doi.org/10.1140/epja/i2002-10102-1