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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Measurements of Pressure-Broadening Coefficients for the F' = 3←F' = 4 Hyperfine Line of the ~2P_(1/2) ← ~2P_(3/2) Transition in Atomic Iodine
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Measurements of Pressure-Broadening Coefficients for the F' = 3←F' = 4 Hyperfine Line of the ~2P_(1/2) ← ~2P_(3/2) Transition in Atomic Iodine

机译：F'= 3←F“ = 4原子碘中〜2P_（1/2）←〜2P_（3/2）跃迁的超细线的压力增大系数的测量

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We describe a series of measurements of pressure-broadening coefficients for the F'=3←F"=4 line of the ~2P_(1/2)←~2P_(3/2) transition in atomic iodine. This is the optical transition of the chemically pumped atomic iodine laser (COIL), and our results are relevant to a ore complete understanding of this important class of high-power lasers. The measurements were made in sealed cells using an argon ion laser to photodissociate molecular iodine and a tunable diode laser to probe directly the atomic transition. We measured broadening coefficients for three bath gases: He, N_2 and O_2. Full absorption line shapes were recorded as a function of the added bath gas pressure and the following values were obtained at room temperature: (Δv/ΔP_(He))_(T=296K) = 3.2 ± 0.3 MHz/Torr, (Δv/ΔP_(N2))_(T=296K) = 5.5 ± 0.6 MHz/Torr, (Δv/ΔP_(O2))_(T=296K) = 5.0 ± 0.5 MHz/Torr, where Δv is the full width at half-maximum. We also measured the temperature dependencies of the He and O_2 broadening coefficients over the range 296 K < T < 775 K. We quote the temperature-dependent values as (Δv/ΔP_(He))_T = (3.2 ± 0.3) * (296/T)~(0.36) and (Δv/ΔP_(O2))_T = (5.5 ± 0.6) * (296/T)~(0.70). Comparisons to previous measurements are also discussed.
机译：我们描述了原子碘中〜2P_（1/2）←〜2P_（3/2）跃迁的F'= 3←F“ = 4线的增宽系数的一系列测量。这是光学跃迁。化学泵浦原子碘激光器（COIL）的研究，我们的结果与矿石对这一重要类别的高功率激光器的完整理解有关。测量是在密封的电池中使用氩离子激光器进行光解离分子碘和可调谐的二极管激光器直接探测原子跃迁。我们测量了三种浴气体He，N_2和O_2的展宽系数。完整的吸收线形状记录为浴气体压力增加的函数，并在室温下获得以下值：（ Δv/ΔP_（He））_（T = 296K）= 3.2±0.3 MHz /托，（Δv/ΔP_（N2））_（T = 296K）= 5.5±0.6 MHz /托，（Δv/ΔP_（O2） ）_（T = 296K）= 5.0±0.5 MHz / Torr，其中Δv是最大最大值的一半。我们还测量了He和O_2扩展系数的温度依赖性在296 K

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