Vacuum ultraviolet photoabsorption of pure solid ozone and its implication on the identification of ozone on Moon

Sivaraman, B.; Nair, B. G.; Raja Sekhar, B.N.; Lo, J.-I.; Sridharan, R.; Cheng, B.-M. and Mason, N. J. (2014). Vacuum ultraviolet photoabsorption of pure solid ozone and its implication on the identification of ozone on Moon. Chemical Physics Letters, 603 pp. 33–36.

DOI: https://doi.org/10.1016/j.cplett.2014.04.021

Abstract

In this Letter we present, for the first time, VUV (109–220 nm) photoabsorption spectra of high density amorphous and crystalline forms of O₃ relevant to both planetary/satellite and InterStellar Medium (ISM) conditions. Absorption in the Hartley region was observed to be very weak or absent when pure O₃ ice was formed in the crystalline phase. Our results suggest that pure solid O₃ effectively absorbs in the Hartley band but only at temperatures <70 K. Such results suggest the need for in-situ techniques to detect the presence of O₃, which otherwise is a minor constituent in the lunar exosphere.

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