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Electron irradiation of carbon dioxide-carbon disulphide ice analog and its implication on the identification of carbon disulphide on Moon

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Abstract

Carbon dioxide (CO2) and carbon disulphide (CS2) molecular ice mixture was prepared under low temperature (85 K) astrochemical conditions. The icy mixture irradiated with keV electrons simulates the irradiation environment experienced by icy satellites and Interstellar Icy Mantles (IIM). Upon electron irradiation the chemical composition was found to have altered and the new products from irradiation were found to be carbonyl sulphide (OCS), sulphur dioxide (SO2), ozone (O3), carbon trioxide (CO3), sulphur trioxide (SO3), carbon subsulphide (C3 S 2) and carbon monoxide (CO). Results obtained confirm the presence of CS2 molecules in lunar south-pole probed by the Moon Impact Probe (MIP).

First results from the electron irradiation of carbon dioxide-carbon disulphide ice analog are reported. Molecules such as O3, CO, CS, C3S2, SO2, OCS and SO3 were synthesized within the ice matrix. SO2 abundance in the ice mixture clubbed with the CHACE data confirmed the presence of CS2 on Lunar South Pole.

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Acknowledgements

BS would like to acknowledge the support from members of the MOL-PH group. Thanks to Prof. Sridharan, for the data from CHACE on MIP, and Prof. Nigel Mason, Dr. Raja Sekhar, Prof. K P Subramanian and Dr. Smitha Thambi for discussion during the preparation of this manuscript. Support from Jasleen Birdi, IIT-Delhi, during the course of this experiment is greatly acknowledged.

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  1. Atomic, Molecular and Optical Physics Division, Physical Research Laboratory, Ahmedabad, 380 009, India

    B SIVARAMAN

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SIVARAMAN, B. Electron irradiation of carbon dioxide-carbon disulphide ice analog and its implication on the identification of carbon disulphide on Moon. J Chem Sci 128, 159–164 (2016). https://doi.org/10.1007/s12039-015-0996-6

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  • DOI: https://doi.org/10.1007/s12039-015-0996-6

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