Ly(α) absorption cross-section of H2O and O2

✍ Scribed by Dieter Kley

• Publisher: Springer Netherlands
• Year: 1984
• Tongue: English
• Weight: 363 KB
• Volume: 2
• Category: Article
• ISSN: 0167-7764
• DOI: 10.1007/bf00114132

✦ Synopsis

The absorption cross-sections of water vapor and oxygen were measured, using a low-pressure radio frequency discharge through traces of hydrogen in argon as a light source for Ly(a) radiation. The cross-sections are OH2 O = 1.59 x 10 -~7 cm 2 and oO2 = 1.13 x 10 -20 + 1.72 x I0 -~ • P, for water and oxygen, respectively, where P is the oxygen pressure in units of Torr. Ly(a) lamps, such as used for this work, are important light sources for photochemical laboratory work and find applications for trace-gas detection in the atmosphere. For the latter application, accurate cross-sections of water vapor and oxygen are needed.