Infrared study of UV/EUV irradiation of naphthalene in H2O+NH3ice
Journal
Advances in Geosciences: Volume 7: Planetary Science (PS)
Pages
79-91
Date Issued
2007
Author(s)
Abstract
Experimental measurements of the destruction yields of NH3 have been carried out by extreme ultraviolet-vacuum ultraviolet (EUV-VUV) photolysis of cosmic ices containing NH3. The ice systems studied in the present work include pure NH3 ices and icy mixtures of NH3 with CO, H2O, and CH4 at a temperature of 10K. A tunable intense synchrotron radiation light source, available at the National Synchrotron Radiation Research Center, Hsinchu, Taiwan, was employed to provide the required EUV-VUV photons. In this study, the photon wavelengths used to irradiate the icy samples were mainly selected to center on the prominent solar lines, namely, the 30.4, 58.4 and 121.6 nm. The photodestruction yields of NH3 in the presently studied ice mixtures are typically higher than 0.5 and can be higher than unity, a very efficient ice photochemical process.
Type
book part