Doppler-free spectroscopy of metastable calcium in a discharge heat pipe
Doppler-free spectroscopy of metastable calcium in a discharge heat pipe
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放电热管中亚稳态钙的无多普勒光谱
DOI：
10.1103/physreva.72.022502
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发表时间：
2005
影响因子：
2.9
通讯作者：
A. Hemmerich
中科院分区：
文献类型：
--
作者：
D. Hansen;A. Hemmerich
本文报道了钙原子的亚稳态{sup3}P{sub2}(4s4p)与多重激发态{sup3}p{sub2}(4p4p)和{sup3}D{sub3}(4s3d)相连接的放电热管中的无多普勒调频光谱和偏振光谱。在一个装满2托霓虹灯的小Pyrex池中运行的热管中有效地产生了钙蒸气。在500V下运行的直流放电有效地填充了亚稳态三重态。观察到了带宽为几十MHz的窄谐振，具有良好的信噪比，非常适合作为激光稳频的参考。对塞曼位移的考察使我们可以确定激发态的朗德g因子，并将它们与基于Russel-Saunders耦合方案的预测进行比较。我们描述了一种经济、简单和强大的实验装置，该装置适用于其他碱土金属原子，如镁和锶，以及其他在室温下蒸气压不足的固体元素。
We report on Doppler-free frequency modulation spectroscopy and polarization spectroscopy in a discharge heat pipe of yet unexplored transitions connecting the metastable {sup 3}P{sub 2}(4s4p) state of calcium atoms with the multiply excited states {sup 3}P{sub 2}(4p4p) and {sup 3}D{sub 3}(4s3d). Calcium vapor is efficiently produced in a heat pipe operating in a small Pyrex cell filled with 2 torr of neon. A dc discharge running at 500 V efficiently populates the metastable triplet states. Narrow resonances with bandwidths of a few tens of MHz with excellent signal-to-noise ratios are observed, well suited as references for laser frequency stabilization. Examination of the Zeeman shifts lets us determine the Lande g factors of the excited states and compare them with the predictions based on the Russel-Saunders coupling scheme. We describe an economic, simple, and robust experimental setup that should work for other alkaline-earth-metal atoms like Mg and Sr, as well as for other solid elements with insufficient vapor pressures at room temperature.