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High-precision half-life determination for ~(21)Na using a 4π gas- proportional counter

机译:使用4π气体比例计数器的高精度半衰期〜(21)NA

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摘要

A high-precision half-lifemeasurement for the superallowed β + transition between the isospin T = 1/2mirror nuclei ~(21)Na and ~(21)Ne has been performed at the TRIUMF-ISAC radioactive ion beam facility yielding T_(1/2) = 22.4506(33) s, a result that is a factor of 4 more precise than the previous world- average half-life for ~(21)Na and represents the single most precisely determined half-life for a transition between mirror nuclei to date. The contribution to the uncertainty in the ~(21)Na Ft ~(mirror) value due to the half-life is now reduced to the level of the nuclearstructure- dependent theoretical corrections, leaving the branching ratio as the dominant experimental uncertainty.
机译:在Tiumf-ISAC放射性离子束设施下,在Tiumf-Isac放射性离子束设施中进行了高精度的半生物测量,用于在肌散T = 1 / 2Mirror核〜(21)Na和〜(21)Ne之间的含量和〜(21)NE之间进行(1 / 2)= 22.4506(33)S,结果是比以前的世界平均半衰期更精确,对于〜(21)Na,并且代表镜子核之间的过渡的单一精确确定的半衰期。迄今为止。由于半衰期而导致的〜(21)Na Ft〜(镜子)值的不确定性的贡献现在减少到核结构依赖性理论校正的水平,将分支比视为主要的实验性不确定性。

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  • 来源
    《Physical Review C》 |2017年第2017期|025501.1-025501.6|共6页
  • 作者单位

    K.U. Leuven Instituut voor Kern- en Stralingsfysica Celestijnenlaan 200D 3001 Leuven Belgium;

    Department of Physics University of Guelph Guelph Ontario N1G 2W1 Canada GANIL CEA/DSM- CNRS/IN2P3 Bvd Henri Becquerel 14076 Caen France.;

    TRIUMF 4004 Wesbrook Mall Vancouver British Columbia V6T 2A3 Canada;

    TRIUMF 4004 Wesbrook Mall Vancouver British Columbia V6T 2A3 Canada NSCL 640 S. Shaw Ln East Lansing Michigan 48824 USA.;

    Department of Physics University of Guelph Guelph Ontario N1G 2W1 Canada;

    Department of Physics University of Guelph Guelph Ontario N1G 2W1 Canada;

    TRIUMF 4004 Wesbrook Mall Vancouver British Columbia V6T 2A3 Canada;

    Department of Physics Queen’s University Kingston Ontario K7L 3N6 Canada;

    Department of Physics University of Guelph Guelph Ontario N1G 2W1 Canada;

    TRIUMF 4004 Wesbrook Mall Vancouver British Columbia V6T 2A3 Canada Idaho National Laboratory Idaho Falls Idaho 83415 USA.;

    TRIUMF 4004 Wesbrook Mall Vancouver British Columbia V6T 2A3 Canada University of Surrey Guildford GU2 5XH United Kingdom.;

    Department of Physics University of Guelph Guelph Ontario N1G 2W1 Canada;

    K.U. Leuven Instituut voor Kern- en Stralingsfysica Celestijnenlaan 200D 3001 Leuven Belgium;

    TRIUMF 4004 Wesbrook Mall Vancouver British Columbia V6T 2A3 Canada Reed College 3203 SEWoodstock Blvd Portland Oregon 97202 USA;

    TRIUMF 4004 Wesbrook Mall Vancouver British Columbia V6T 2A3 Canada;

    Department of Physics University of Guelph Guelph Ontario N1G 2W1 Canada;

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