In:
The Journal of Chemical Physics, AIP Publishing, Vol. 126, No. 24 ( 2007-06-28)
Abstract:
The authors present the results of a morphological study of solid ammonia using both Fourier-transform infrared and vacuum ultraviolet (VUV) spectroscopy. Dramatic changes in the VUV and infrared spectra at temperatures between 65 and 85K provide a deeper insight into the structure of ammonia ice particularly with the observation of an exciton transition at 194nm (6.39eV) in the VUV spectrum, revealing a structure that is composed of crystallites. A complementary structure is observed in the IR spectrum at 1100cm−1 which is assigned to the symmetric deformation of ammonia molecules at the surfaces of the crystallites. Such spectral signatures may be used to identify the environment within which the ammonia ice is formed and provide a new route for obtaining information on the physical and chemical conditions occurring within the interstellar medium, on the surfaces of planetary bodies, and in Kuiper belt objects.
Type of Medium:
Online Resource
ISSN:
0021-9606
,
1089-7690
Language:
English
Publisher:
AIP Publishing
Publication Date:
2007
detail.hit.zdb_id:
3113-6
detail.hit.zdb_id:
1473050-9
