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Mass-to-charge dependent temperature programmed desorption (TPD) profiles obtained after photoionizing the desorbing molecules of irradiated (a) phosphine (PH3) and carbon dioxide (CO2) ice with 10.86 eV photons, (b) phosphine (PH3) and [13C]-carbon dioxide (13CO2) ice with 10.86 eV photons, (c) phosphine (PH3) and [18O]-carbon dioxide (C18O2) ice with 10.86 eV photons, and (d) phosphine (PH3) and carbon dioxide (CO2) ice with 9.60 eV photons.
