Zeeman scanning of hydroxyl and zinc absorption line profiles in flames at atmospheric and reduced pressure

✍ Scribed by Tj. Hollander; H.P. Broida

• Publisher: Elsevier Science
• Year: 1969
• Tongue: English
• Weight: 563 KB
• Volume: 13
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(69)90029-7

✦ Synopsis

Absorption line profilez have been determined in laminar, premixed, shi~,~ed flames at atmospheric and at reduced pressure, by making use of a Zeeman scanning technique. The wavelength of a background lot, v-pressure discharge light source was changed by 4-0.1 A with a variable magnetic field. Line profiles of one atomic zinc line and two rotational lines in the 0,0 band of the 2Z* -211 transition of OH have been measured in the flames.

Values for the damping parameter a values of the lines and average values for collision cross sections are derived from these profiles for OH and Zn lines in ,'lames at pressures from 50 to 760 torr and temperatures from 2100°to 2 300°K. The dependence of the damping parameter on overall flame pressure agrees with theoretical predictions.