Pressure broadening and shift of the potassium D1 transition by the noble gases and N2, H2, HD, D2, CH4, C2H6, C3H8, and n-C4H10 with comparison to other alkali rates

• Published in: Journal of quantitative spectroscopy & radiative transfer Vol. 113; no. 5; pp. 387 - 395
• Main Authors: Pitz, Greg A., Sandoval, Andrew J., Zameroski, Nathan D., Klennert, Wade L., Hostutler, David A.
• Format: Journal Article
• Language: English
• Published: 01.03.2012
• ISSN: 0022-4073
• DOI: 10.1016/j.jqsrt.2011.12.005

The pressure broadening and shift rates for the potassium D 1 ( 4 2 P 1 / 2 arrow left 4 2 S 1 / 2 ) transition with the noble gases and 3He, H2, HD, D2, N2, CH4, C2H6, C3H8, and n-C4H10 were obtained for pressures up to 80 Torr and at a temperature of 55 degree C by means of laser absorption spectroscopy. The collisional broadening rate, gamma L , for He, 3He, Ne, Ar, Kr, Xe, H2, HD, D2, N2, CH4, C2H6, C3H8, and n-C4H10 are 13.08, 17.46, 6.14, 19.45, 16.64, 20.02, 22.15, 19.36, 17.47, 17.78, 29.35, 26.63, 27.27, and 27.85 MHz/Torr, respectively. The uncertainty in the broadening rates is typically less than 1.6%. The corresponding pressure induced shift rates, delta , are 1.63, 6.82, -1.27, -6.44, -5.42, -6.54, -5.34, -5.10, -4.70, -6.80, -7.41, -8.32, -8.59, and -8.80 MHz/Torr with a uncertainty of less than 2.4%. A comparison with the other alkali D1 broadening cross-sections is presented.