Quantification of O2 formation during UV photolysis of water ice: H2O and H2O:CO2 ices M. Bulak, D. M. Paardekooper, G. Fedoseev, K.-J. Chuang, J. Terwisscha van Scheltinga, C. Eistrup and H. Linnartz A&A, 657 (2022) A120 Published online: 20 January 2022 DOI: 10.1051/0004-6361/202141875