Diode laser measurements of linestrength and temperature-dependent lineshape parameters of H2O-, CO2-, and N-2-perturbed H2O transitions near 2474 and 2482 nm

作者：Goldenstein Christopher S^*; Jeffries Jay B; Hanson Ronald K

来源：Journal of Quantitative Spectroscopy and Radiative Transfer, 2013, 130: 100-111.

DOI：10.1016/j.jqsrt.2013.06.008

• H2O
• Absorption
• Line strength
• Collisional broadening
• Collisional (Dicke) narrowing
• High temperature

Absorption lineshapes for two unresolved H2O doublets near 4029.52 and 4041.92 cm(-1) were measured at high-resolution in a heated static cell using two distributed-feedback diode lasers. Measurements were acquired for H2O, CO2, and N-2 perturbers over a temperature and pressure range of 650-1325 K and 2-760 Torr, respectively. Strong collisional narrowing effects were observed in CO2 and N-2, but not in pure H2O. The Galatry profile was used to infer collisional-broadening and -narrowing coefficients and their respective temperature dependence for CO2 and N-2 perturbers. The collisional-broadening and -narrowing coefficients for CO2 perturbers were found to decrease with increasing temperature in a similar manner. For N-2 perturbers, the collisional-broadening coefficients increased with temperature while the collisional-narrowing coefficients decreased with increasing temperature. Self-broadening coefficients were inferred from Voigt profile fits and are compared with HITEMP 2010. The linestrengths of 17 H2O transitions are also reported.

• 出版日期2013-11