Measurement of the beta-nu correlation coefficient a(beta nu) in the beta decay of trapped He-6(+) ions
Measurement of the beta-nu correlation coefficient a(beta nu) in the beta decay of trapped He-6(+) ions
复制标题
捕获 He-6( ) 离子的 β 衰变中 β-nu 相关系数 a(beta nu) 的测量
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
J. Thomas
中科院分区：
文献类型：
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作者：
X. Fléchard;P. Velten;E. Liénard;A. Méry;D. Rodríguez;G. Ban;D. Durand;F. Mauger;O. Naviliat;O. Naviliat;J. Thomas
我们使用透明保罗陷阱测量了 6He+ 离子 β 衰变中的 β-ν 角相关性。 GANIL 产生的 6He+ 离子首先被冷却并聚集，然后注入 LPCTrap 设置中。角度相关性是根据与 β 粒子同时检测到的反冲核的飞行时间推断出来的。检测系统可以访问完整的β衰变运动学，提供检查数据可靠性并拒绝大部分背景的方法。我们发现 aβν = −0.3335(73)stat(75)syst，与纯伽莫夫-泰勒转变的标准模型预测一致。
We have measured the β-ν angular correlation in the β decay of 6He+ ions using a transparent Paul trap. The 6He+ ions, produced at GANIL, were first cooled and bunched before being injected in the LPCTrap setup. The angular correlation was inferred from the time of flight of recoil nuclei detected in coincidence with the β particles. The detection system gives access to the full β decay kinematics, providing means to check the data reliability and to reject a large fraction of background. We find aβν = −0.3335(73)stat(75)syst, in agreement with the standard model prediction for a pure Gamow-Teller transition.