Girard Véronique, Farrenq Robert, Sorokin Evgeni, Sorokina Irina T, Guelachvili Guy, Picqué Nathalie
Laboratoire de Photophysique Moléculaire, Unité Propre du C.N.R.S., Bâtiment 350, Université de Paris-Sud, 91405 Orsay, France.
Chem Phys Lett. 2006 Feb 26;419(4-6):584-588. doi: 10.1016/j.cplett.2005.12.029.
The spectral dynamics of a mid-infrared multimode Cr(2+):ZnSe laser located in a vacuum sealed chamber containing acetylene at low pressure is analyzed by a stepping-mode high-resolution time-resolved Fourier transform interferometer. Doppler-limited absorption spectra of C(2)H(2) in natural isotopic abundance are recorded around 4000 cm(-1) with kilometric absorption path lengths and sensitivities better than 3 10(-8) cm(-1). Two cold bands are newly identified and assigned to the ν(1)+ν(4) (1) and ν(3)+ν(5) (1) transitions of (12)C(13)CH(2). The ν(1)+ν(5) (1) band of (12)C(2)HD and fourteen (12)C(2)H(2) bands are observed, among which for the first time ν(2)+2ν(4) (2)+ν(5) (-1).
通过步进模式高分辨率时间分辨傅里叶变换干涉仪分析了置于装有低压乙炔的真空密封腔中的中红外多模Cr(2+):ZnSe激光器的光谱动力学。在4000 cm(-1)附近记录了自然同位素丰度下C(2)H(2)的多普勒极限吸收光谱，吸收路径长度达千米，灵敏度优于3×10(-8) cm(-1)。新识别出两个冷带，并将其归属于(12)C(13)CH(2)的ν(1)+ν(4) (1)和ν(3)+ν(5) (1)跃迁。观测到了(12)C(2)HD的ν(1)+ν(5) (1)带和14个(12)C(2)H(2)带，其中首次观测到ν(2)+2ν(4) (2)+ν(5) (-1)。
