Linear absorption measurements of pressure broadening in neon
Linear absorption measurements of pressure broadening in neon
复制标题
氖管压力展宽的线性吸收测量
DOI：
10.1088/0953-4075/24/23/018
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
D. Stacey
中科院分区：
文献类型：
--
作者：
A. Lindsay;J. L. Nicol;D. Stacey
用可调谐激光器的线性吸收技术研究了氖气λ 585.2nm和λ 667.8nm氖线在77 K和300 K下的自展宽。氖同位素的天然混合物在弱直流放电中被激发。由于两条谱线的较低能级是强共振能级1 s2，因此预期加宽主要是由于共振相互作用。这个能级的辐射宽度是从外推到零密度的线的洛伦兹宽度导出的，导致共振振荡器强度为0.158（10）。λ 585.2 nm和λ 667.8 nm的测量展宽常数分别为，以1023 MHz m3原子-1，77 K为单位：205（5），204（9）和300 K：186（11），191（6），其中引用的误差仅代表统计不确定性。纯共振加宽将给出值188（7）。在较低的温度下，在两条线的加宽中检测到轻微的曲率。
Self-broadening of the neon lines lambda 585.2 nm and lambda 667.8 nm at 77 K and 300 K has been studied by the linear absorption technique using a tunable laser. The natural mixture of neon isotopes was excited in a weak DC discharge. The broadening is expected to be due mainly to the resonance interaction since the lower level of both lines is the strong resonance level 1s2. The radiation width of this level was derived from the Lorentzian widths of the lines extrapolated to zero density, leading to a resonance oscillator strength of 0.158(10). The measured broadening constants of lambda 585.2 nm and lambda 667.8 nm respectively were, in units of 1023 MHz m3 atom-1, 77 K: 205(5), 204(9) and 300 K: 186(11), 191(6), where the quoted errors represent only statistical uncertainty. Pure resonance broadening would give the value 188(7). A slight curvature was detected in the broadening of both lines at the lower temperature.