二硫化碳气体近紫外吸收截面积测定

Measurement of Near-UV Absorption Cross Sections of CS_2

利用二极管阵列光谱仪,室温条件下,在波长220～380 nm的波段内,测量了CS2的紫外吸收截面积。发现CS2在315 nm处具有较大吸收,其值为σ=7.184×10-20cm2.molecule-1。与文献报道进行了比对,吻合较好,并利用所获得的数据对CS2大气光解寿命进行了评估。

The UV-absorption cross sections of CS2 are reported. The absorption spectra were measured by using a diode array spectrometer over the wavelength range of 220-380 nm at room temperature （298±3）K. The maximum absorption cross section appeared around 315 nm with the value of a（315 nm） = 7. 184× 10^-20 cm^2 · molecule^-1. The measured data by this study were in good agreement with that reported in the literature, and used to estimate the photolysis of the CS2 in the atmosphere.