UV-PHOTOSTIMULATED PRODUCTION OF DEUTERIUM MOLECULES FROM AMORPHOUS D2O ICE AT 12K
Naoki WATANABE, Toshikazu HORII, and Akira KOUCHI
Institute of Low Temperature Science, Hokkaido University,Sapporo, Hokkaido 060-0819, Japan
Production of D2 molecules was observed in vuv-photostimulated reaction of the amorphous D2O 
ice. D2 yields were measured by a thermal desorption method after the irradiation of 172nm and 
126nm photons from excimer lamps onto the thin amorphous ice at 12K. The yields show saturated 
at long irradiation time. Photon-flux and -energy dependence of the yields implies that the 
D2-formation reaction is one-photon process and proceeds via the first electronic excited 
state of condensed heavy water.