ULTRAVIOLET PHOTON-INDUCED SYNTHESIS AND TRAPPING OF H2O2 AND O-3 IN POROUS WATER ICE FILMS IN THE PRESENCE OF AMBIENT O-2: IMPLICATIONS FOR EXTRATERRESTRIAL ICE

作者：Shi J; Raut U; Kim J H; Loeffler M; Baragiola R A^*

来源：Astrophysical Journal Letters, 2011, 738(1): L3.

DOI：10.1088/2041-8205/738/1/L3

• atomic processes
• methods: laboratory
• planets and satellites: atmospheres
• planets and satellites: surfaces
• radiation mechanisms: general

The mass uptake of ambient oxygen in nanoporous ice is enhanced by irradiation with 193 nm photons, due to conversion of O-2 into H2O2 and O-3, with an efficiency that increases with decreasing temperature. These findings show a new way to form H2O2 and O-3 on icy surfaces in the outer solar system at depths much larger than are accessible by typical ionizing radiation, with possible astrobiological implications.

• 出版日期2011-9-1