Bielska Katarzyna, Tran Duc Dung, Balashov Aleksandr A, Domysławska Jolanta, Wójtewicz Szymon, Bober Marcin, Bilicki Sławomir, Ciuryło Roman, Lisak Daniel
Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University in Toruń, Grudziadzka 5, 87-100 Torun, Poland.
Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University in Toruń, Grudziadzka 5, 87-100 Torun, Poland.
Spectrochim Acta A Mol Biomol Spectrosc. 2023 Dec 15;303:123185. doi: 10.1016/j.saa.2023.123185. Epub 2023 Jul 25.
The air-broadened lines from the oxygen B band were measured for the first time in controlled laboratory conditions with a high signal-to-noise ratio using frequency-stabilized cavity ring-down spectroscopy (FS-CRDS) referenced to the optical frequency comb. Spectra measured at various pressures and temperatures were analyzed with an advanced line-shape model, considering the speed-dependence of collisional broadening and shift, and the effect of velocity-changing collisions. The temperature dependence of collisional broadening and shift is determined, whereas no significant temperature dependence of speed-dependent parameters and Dicke narrowing was observed. In addition, we have demonstrated that reasonable estimation of temperature dependence for pressure broadening is possible even from measurements done in single temperature where the speed dependence of pressure broadening was determined. New spectroscopic data improve the accuracy of the air-broadened oxygen B-band spectra description by an order of magnitude.
利用与光学频率梳校准的频率稳定腔衰荡光谱技术（FS-CRDS），首次在可控实验室条件下以高信噪比测量了氧气B带的空气加宽谱线。考虑到碰撞加宽和频移的速度依赖性以及速度改变碰撞的影响，使用先进的线形模型对在不同压力和温度下测量的光谱进行了分析。确定了碰撞加宽和频移的温度依赖性，而未观察到速度相关参数和迪克窄化有明显的温度依赖性。此外，我们已经证明，即使是在确定了压力加宽速度依赖性的单一温度下进行的测量，也能够合理估计压力加宽的温度依赖性。新的光谱数据将空气加宽氧气B带光谱描述的精度提高了一个数量级。
