Photodepletion of CO2 from various ices by Lyman-α radiation at 75 K. The Lyman-α fluence at the end of each experiment is 4.2 × 1018 photons cm−2.
UV-induced photodesorption of 12CO2 and 13CO2 in different ice matrices at 75 K.
UV-induced photodesorption of 12CO2 and 13CO2 in an unsymmetrical 12CO2 (75%) and 13CO2 (25%) mixed ice at 75 K. Each of the 13CO2 data points is averaged from 5 original spectra to reduce the noise.
Kinetic pathways of confined CO2 in CO2(ice).
Role of vibrational relaxation in lattice ice in depleting CO2(V*)—good coupling between pure CO2 molecules. When O···CO separation beyond a critical distance, rc, occurs, photoreaction takes place.
Role of vibrational relaxation in lattice ice in depleting CO2(V*)—poor coupling between 12CO2 and 13CO2 molecules.
Comparison of the efficiency of CO2 photodesorption from different ice matrices at T = 75 K.
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