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Significance N2 is present as ice in cold outer space. In this work, photochemical experiments with concurrent detection of infrared absorption and visible emission spectra provide evidence for the generation of energetic products N2 D atom andl -N3 radical after photolysis of icy N2 with vacuum-ultraviolet radiation. We found that the photolysis of icy N2 may also produce the long-lived N2 Dlong atom which can be triggered to release emission or to induce the synthesis ofl -N3 upon raising of the temperature. This work enhances our understanding of the transformation of nitrogen species in cold astroenvironments; the results also open a window into photochemical processes in solid state.

Thermal reaction and luminescence of long-lived N 2 D in N 2 ice

Thermal reaction and luminescence of long-lived N ² D in N ₂ ice