Precision measurement of the branching fractions of the 4p 2P3/2 decay of Ca II
Precision measurement of the branching fractions of the 4p 2P3/2 decay of Ca II
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DOI：
10.1140/epjd/e2008-00196-9
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发表时间：
2008-11-01
影响因子：
1.8
通讯作者：
Roos, C. F.
中科院分区：
文献类型：
--
作者：
Gerritsma, R.;Kirchmair, G.;Roos, C. F.
我们对悬浮在线性Paul阱中的单个Ca-40（+）离子的4p P-2（3/2）能级衰变的分支比进行了精确测量。高精度是通过一种新的技术实现的基础上监测人口转移时，反复泵离子之间的不同内部状态。发现4s S-2（1/2）、3d D-2（5/2）和3d D-2（3/2）水平的分支分数分别为0.9347（3）、0.0587（2）和0.00661（4）。对于分支比A（P-3/2-S-1/2）/Sigma（J）A（P-3/2-D-J）= 14.31（5），我们发现与先前的最佳测量相比，准确度提高了40倍。
We perform precision measurements of the branching ratios of the 4p P-2(3/2) level decay of a single Ca-40(+) ion suspended in a linear Paul trap. High precision is achieved by a novel technique based on monitoring the population transfer when repeatedly pumping the ion between different internal states. The branching fractions into the 4s S-2(1/2), 3d D-2(5/2) and 3d D-2(3/2) levels are found to be 0.9347(3), 0.0587(2) and 0.00661(4), respectively. For the branching ratio A(P-3/2-S-1/2)/Sigma(J) A(P-3/2-D-J) = 14.31(5), we find a forty-fold improvement in accuracy as compared to the best previous measurement.