Abstract

Unsaturated absorption coefficients in pure CO₂ and binary mixtures of CO₂ with buffer gases M_j (He, Ar, Kr, Xe, N₂, O₂, CO, N₂O, ¹³C¹⁶O₂) were measured with a tunable CO₂ laser at the central frequencies of the R(8), R(22), R(34), P(8), P(22), and P(36) CO₂ spectral lines of the 10⁰0–00⁰1 transition at a temperature of 300–700 K. A technique is described and the coefficients of self-broadening and broadening of CO₂ spectral lines by a buffer gas M_j are calculated. It is shown that the efficiency of the CO₂ interaction with diatomic and triatomic molecules is determined by the electric moment; in the case of inert gases, the mass factor plays the major role. It is ascertained that the temperature dependences of the collisional broadening of CO₂ spectral lines can be highly accurately approximated by power functions with two different exponents.

中文翻译：

---

缓冲气体对振动-旋转CO 2线的碰撞扩展

摘要

用可调仪器测量纯CO ₂和CO ₂与缓冲气体M _j  （He，Ar，Kr，Xe，N ₂，O ₂，CO，N ₂ O，¹³ C ¹⁶ O ₂）的二元混合物中的不饱和吸收系数。CO ₂激光器的中心频率为R（8），R（22），R（34），P（8），P（22）和P（36），CO ₂光谱线为10 ⁰ 0–00 ⁰1在300–700 K的温度下转变。描述了一种技术，并计算了由缓冲气体M _j引起的CO ₂光谱线的自增宽和增宽系数。结果表明，CO ₂与双原子和三原子分子相互作用的效率取决于电力矩。对于惰性气体，质量因子起主要作用。可以确定， 通过具有两个不同指数的幂函数，可以高度精确地近似CO ₂谱线的碰撞展宽的温度依赖性。