Photochemical Processing of NH_3/CO2 and NH_3/H_2O Ices

Details Photochemical Processing of NH_3/CO2 and NH_3/H_2O Ices Photochemical Processing of NH_3/CO2 and NH_3/H_2O Ices

Mar 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aps..mar.i3865c&link_type=abstract

American Physical Society, Annual March Meeting, March 16-20, 1998 Los Angeles, CA, abstract #I38.65

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The investigation of ices and their modification by photochemical processes have important applications in atmospheric physics and planetary astronomy. In this study, NH_3/CO2 and NH_3/H_2O ice mixtures were formed at 77 K. These mixtures were then characterized using x-ray photoelectron spectroscopy (XPS). The chemical changes in the ices were monitored while the ices were continuously exposed to x-rays for several hours. Significant changes were observed in the XPS core level lines for the NH_3/CO2 but not the NH_3/H_2O ice. A quadrupole mass spectrometer was also used to monitor the species evolving from the ice surface during the photoprocessing. The XPS and mass spectrometer results are correlated and the possible mechanisms associated with the photochemical processing of the ices are presented.

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