COMETARY ICE ANALOGS: TPD AND FTIR STUDY OF CO$_2$/H$_2$O ICES
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Date
2007
Journal Title
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Publisher
Ohio State University
Abstract
Frozen CO$_2$ is, after water, one of the main components of cometary nuclei. The structure of CO$_2$ ice in interaction with water ice depends on several factors, like deposition scheme, temperature or density. We present an investigation on ice mixtures of water and CO$_2$ and their variation with temperature, based on temperature programmed desorption (TPD) and infrared spectroscopy measurements. Two slightly different CO$_2$ structures are shown to exist, and their relative concentration is found to depend critically on the deposition sequence and temperature of the sample.
Description
Author Institution: Instituto de Estructura de la Materia, CSIC,; Madrid, Spain; Instituto de Astrof\isica de Andaluc\ia,; CSIC, P.O.Box 3004, 18080 Granada, Spain