science-softCon uv/vis+ photochemistry database;	www.photochemistry.org; (C) science-softCon 2019

Substance: oxygen 					Other Names: 

Formula: O2						CAS-No.: 7782-44-7

Study: UV absorption cross section


Authors: H.-C. Lu, H.-K. Chen, H.-F. Chen, B.-M. Cheng, J.F. Ogilvie

Title: Absorption cross section of molecular oxygen in the transition E ³SIGMA¯u v = 0 - X ³SIGMA¯g v = 0 at 38 K

Journal/Source: Astronomy & Astrophysics, 520, A19, (2010); doi:10.1051/0004-6361/201013998


Data: diagram, table

Energy/Wavelength range: 115 - 180 nm

Resolution: 0.02 - 0.05 nm

Temperature: 38 K; 303.7 K

Temperature dependence: 

Pressure/Concentration: 

Phase: solid, gas

pH:


Comments: The maximum absorption cross section for the transition from X ³SIGMA¯g v = 0 to E ³SIGMA¯u v = 0 for 16O2 at 38 K 
was determined to be 98.7 Mb (or 9.87×10-18 cm2). The value of this maximum absorption cross section at 38 K is 1.7 times 
the value at 303.7 K.
At 124.44 nm the maximum value is 57.6 Mb and 18.4 Mb at 120.54 nm.

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