Radiative lifetimes of neutral and singly ionized atoms of refractory elements
Radiative lifetimes of neutral and singly ionized atoms of refractory elements
复制标题
难熔元素的中性原子和单电离原子的辐射寿命
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
V. Helbig
中科院分区：
文献类型：
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作者：
G. Langhans;W. Schade;V. Helbig
皮秒激光诱导荧光光谱和脉冲空心阴极放电被施加到测量66辐射寿命的Ta II，Ti II，Ce II，Zr II，Zr I，和Fe I的水平。在目前的调查系统的影响，如偏振和磁场效应，辐射捕获，淬火和激发激光脉冲的持续时间被认为是在数据分析。选择性的激光激发下的调查水平进行频率稳定的分布反馈染料激光系统和荧光记录的光子计数技术，以确保最佳的灵敏度和时间分辨率。典型的脉冲宽度为100 ps，光谱带宽为0.006 nm。数据的绝对准确度为3%至6%。
Picosecond laser-induced fluorescence spectroscopy and a pulsed hollow cathode discharge are applied to measure 66 radiative lifetimes of Ta II, Ti II, Ce II, Zr II, Zr I, and Fe I levels. In the present investigation systematic influences like polarization and magnetic field effects, radiation trapping, quenching and the duration of the exciting laser pulse are considered in the data analysis. The selective laser excitation of the levels under investigation is performed by a frequency-stabilized distributed feedback dye laser system and the fluorescence is recorded by photon counting technique to ensure best sensitivity and time-resolution. The typical pulse duration is 100 ps and the spectral bandwidth 0.006 nm. The absolute accuracy of the data is 3 to 6%.