Identification of a unique VUV photoabsorption band of carbonic acid for its identification in radiation and thermally processed water-carbon dioxide ices

Pavithraa, S, Lo, J.-I., Cheng, B.-M., Sekhar, B.N. Raja, Mason, Nigel, Sivaraman, B. (2019) Identification of a unique VUV photoabsorption band of carbonic acid for its identification in radiation and thermally processed water-carbon dioxide ices. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 215 . pp. 130-132. ISSN 1386-1425. (doi:10.1016/j.saa.2019.02.037) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:73019)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.

Official URL: https://doi.org/10.1016/j.saa.2019.02.037

Abstract

Carbonic acid was synthesized within an ice containing water and carbon dioxide by irradiation of ~9 eV photons. Vacuum UltraViolet (VUV)/UltraViolet (UV) photoabsorption spectra of the irradiated ice revealed absorption features from carbon dioxide, ozone, water, carbon monoxide and oxygen in addition to a band peaking at ~200 nm which is identified to be characteristic of carbonic acid. After thermal processing of the irradiated ice leading to desorption of the lower volatile ices, a pure carbonic acid spectrum is identified starting from 170 K until sublimation above 230 K. Therefore the ~200 nm band in the VUV region corresponding to carbonic acid is proposed to be a unique identifier in mixed ices, rich in water and carbon dioxide typically encountered on planetary and satellite surfaces.

Item Type:	Article
DOI/Identification number:	10.1016/j.saa.2019.02.037
Institutional Unit:	Schools > School of Engineering, Mathematics and Physics > Physics and Astronomy
Former Institutional Unit:	Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User:	Nigel Mason
Date Deposited:	15 Mar 2019 10:51 UTC
Last Modified:	20 May 2025 09:44 UTC
Resource URI:	https://kar.kent.ac.uk/id/eprint/73019 (The current URI for this page, for reference purposes)

University of Kent Author Information

Mason, Nigel.

Creator's ORCID:	https://orcid.org/0000-0002-4468-8324
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