Part-per-billion measurement of the 42S1/2→32D5/2 electric-quadrupole-transition isotope shifts between Ca+42,44,48 and Ca+40
Part-per-billion measurement of the 42S1/2→32D5/2 electric-quadrupole-transition isotope shifts between Ca+42,44,48 and Ca+40
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42S1/2–32D5/2 电四极跃迁同位素在 Ca 42、44、48 和 Ca 40 之间移动的十亿分之一测量
DOI：
10.1103/physreva.100.022514
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发表时间：
2019
影响因子：
2.9
通讯作者：
Doret, S. Charles
中科院分区：
文献类型：
--
作者：
Knollmann, Felix W.;Patel, Ashay N.;Doret, S. Charles
本文报道了在729nm波长处的电四极跃迁中同位素位移的精确测量。测量已经通过高分辨率激光光谱的共捕获离子，发现测量的位移为2 771 872 467.6（7.6），5 340 887 394.6（7.8），和9 990 381 870.0（6.3）Hz之间，分别。通过同时激发两种同位素，使用来自单个激光器的频率边带，消除了由激光器频率漂移引起的系统不确定性。这使得更大的精度比类似的以前公布的测量在其他碱土金属系统。由此产生的测量精度为理论同位素位移计算的测试提供了基准，也为通过同位素位移光谱学探索新物理学迈出了一步。
We report a precise measurement of the isotope shifts in theelectric quadrupole transition at 729 nm in. The measurement has been made via high-resolution laser spectroscopy of co-trapped ions, finding measured shifts of 2 771 872 467.6(7.6), 5 340 887 394.6(7.8), and 9 990 381 870.0(6.3) Hz betweenand, respectively. By exciting the two isotopes simultaneously, using frequency sidebands derived from a single laser, systematic uncertainties resulting from laser frequency drifts are eliminated. This permits far greater precision than similar previously published measurements in other alkaline-earth-metal systems. The resulting measurement accuracy provides a benchmark for tests of theoretical isotope shift calculations and also offers a step towards probing new physics via isotope shift spectroscopy.