science-softCon uv/vis+ photochemistry database; www.photochemistry.org; (C) science-softCon 2019 Substance: water Other Names: Formula: H2O CAS-No.: 7732-18-5 Study: absorption cross sections Authors: D.J. Creasey, D.E. Heard, J.D. Lee Title: Absorption Cross-Section Measurements of Water Vapour and Oxygen at 185 nm. Implications for the Calibration of Field Instruments to Measure OH, HO2 and RO2 Radicals Journal/Source: Geophys. Res. Lett., 27, 1651-1654, (2000); https://doi.org/10.1029/1999GL011014 Data: Energy/Wavelenght range: ~ 184.9 nm Resolution: Temperature: 298 K Temperature dependence: no Pressure/Concentration: Phase: vapor pH: Comments: Absorption cross sections for oxygen and water vapour were measured using a low-pressure mercury lamp optically filtered to isolate the emission close to 184.9 nm. For water vapour, an absorption cross-section of 7.22 (± 0.22) × 10-20 cm² molecule-1 was determined at 25°C. Author to whom correspondence should be addressed: (e-mail address):