Differential laser absorption spectroscopy of uranium in an atmospheric pressure laser-induced plasma.
Differential laser absorption spectroscopy of uranium in an atmospheric pressure laser-induced plasma.
复制标题
大气压激光诱导等离子体中铀的差分激光吸收光谱。
作者：
N. Taylor;M. Phillips
采用双光束差分激光吸收技术在大气压激光诱导等离子体中测量高信噪比的 238U 吸收光谱。给出了在压力高达 760 Torr 的干燥空气中 238U 861 nm 跃迁的高分辨率吸收光谱。在 760 Torr 的干燥空气中，发现 238U 谱线的光谱线宽 (FWHM) 为 2.23±0.13 GHz。使用低 238U 浓度 NIST 玻璃标准品进行吸收光谱测量来证明该方法的灵敏度。
A two-beam differential laser absorption technique is used to measure 238U absorption spectra with high signal-to-noise ratios in an atmospheric pressure laser-induced plasma. High-resolution absorption spectra are presented for the 238U 861 nm transition in the presence of dry air at pressures up to 760 Torr. A spectral linewidth (FWHM) of 2.23±0.13 GHz was found for the 238U line in dry air at 760 Torr. Absorption spectrum measurements using a low 238U concentration NIST glass standard were used to demonstrate sensitivity of the approach.