Bouanich JP, Blanquet G, Walrand J
Laboratoire de Photophysique Moléculaire, CNRS, Université de Paris Sud, Bâtiment 350, Orsay Cedex, F-91405, France
J Mol Spectrosc. 1999 Apr;194(2):269-277. doi: 10.1006/jmsp.1999.7806.
O2-broadening coefficients have been measured for 29 lines of C2H2 at 173.2 K in the P and R branches of the nu5 band near 14 µm, using a tunable diode-laser spectrometer. The collisional widths obtained by Rautian profiles closely fitting the measured spectral shape of the lines are slightly larger than those derived from Voigt profiles. The broadening coefficients are compared with results calculated from a semiclassical theory, performed by considering, in addition to electrostatic interactions involving the hexadecapole moments of C2H2 and O2, the atom-atom Lennard-Jones model. By comparing broadening coefficients at 297 and 173.2 K from a simple power law, the temperature dependence of these broadenings has been determined both experimentally and theoretically. Copyright 1999 Academic Press.
使用可调谐二极管激光光谱仪，在14μm附近ν5带的P支和R支中，于173.2K下测量了C2H2的29条谱线的O2展宽系数。通过Rautian轮廓紧密拟合谱线的测量光谱形状得到的碰撞宽度略大于从Voigt轮廓导出的碰撞宽度。将展宽系数与根据半经典理论计算的结果进行比较，该理论除了考虑涉及C2H2和O2十六极矩的静电相互作用外，还考虑了原子-原子Lennard-Jones模型。通过从简单幂律比较297K和173.2K下的展宽系数，已通过实验和理论确定了这些展宽的温度依赖性。版权所有1999年学术出版社。
