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arXiv 1802.02749physics.atom-ph
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空心阴极灯中铝原子的紫外laser光谱

Ultraviolet laser spectroscopy of aluminum atoms in hollow-cathode lamp

Hongli Liu, Wenhao Yuan, Zetian Xu, Ke Deng, Zehuang Lu

摘要:

报道了在空心阴极灯(HCL)中对铝原子394 nm处的${^{2}P_{1/2}}-{^{2}S_{1/2}}$跃迁和396 nm处的${^{2}P_{3/2}}-{^{2}S_{1/2}}$跃迁的精密测量。进行吸收光谱和饱和吸收光谱(SAS)。从吸收光谱的多普勒线宽估计为2.6 GHz。基于变速效应模型对SAS光谱进行了分析。用频率梳校准波长计测量了${^{2}P_{1/2}},{F=3}-{^{2}S_{1/2}},{F=2}$跃迁和${^{2}P_{3/2}},{F=4}-{^{2}S_{1/2}},{F=3}$跃迁的频率分别为759.905401(10)THz和756.547403(10)THz。测定了铝原子的超精细结构常数,并与以前报道的测量结果和理论计算进行了比较。磁偶极子常数(A常数)的合理协议,而电四极常数(B常数)有很大的偏差。

英文摘要:

We report precision measurement of aluminum atoms ${^{2}P_{1/2}}-{^{2}S_{1/2}}$ transition at 394 nm and ${^{2}P_{3/2}}-{^{2}S_{1/2}}$ transition at 396 nm in a hollow-cathode lamp (HCL). Both absorption spectroscopy and saturated absorption spectroscopy (SAS) are performed. From the absorption spectroscopy the Doppler linewidth is estimated to be 2.6 GHz. The SAS spectroscopy is analyzed based on the velocity-changing-effect model. With a frequency comb calibrated wavemeter, the frequencies of ${^{2}P_{1/2}},{F=3}-{^{2}S_{1/2}},{F=2}$ transition and ${^{2}P_{3/2}},{F=4}-{^{2}S_{1/2}},{F=3}$ transition are measured to be 759.905401(10) THz and 756.547403(10) THz, respectively. The hyperfine structure constants of aluminum atoms are determined and compared with previously reported measurement results and theoretical calculation. Reasonable agreement is found for the magnetic dipole constant (A constant), while the electric quadrupole constant (B constant) has a large deviation.

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