title: Communication: vacuum ultraviolet photoabsorption of interstellar icy thiols.
abstract: Following the recent identification of ethanethiol in the interstellar medium (ISM) we have carried out Vacuum UltraViolet (VUV) spectroscopy studies of ethanethiol (CH3CH2SH) from 10 K until sublimation in an ultrahigh vacuum chamber simulating astrochemical conditions. These results are compared with those of methanethiol (CH3SH), the lower order thiol also reported to be present in the ISM. VUV spectra recorded at higher temperature reveal conformational changes in the ice and phase transitions whilst evidence for dimer production is also presented.
authors.affiliation: Department of Chemistry, Indian Institute of Technology - Madras, Chennai, India.
authors.forename: Radha Gobinda
authors.initials: RG
authors.lastname: Bhuin
authors.affiliation: Space and Atmospheric Sciences Division, Physical Research Laboratory, Ahmedabad, India.
authors.forename: Bhalamurugan
authors.initials: B
authors.lastname: Sivaraman
authors.affiliation: National Synchrotron Radiation Research Center, Hsinchu, Taiwan.
authors.forename: Jen-Iu
authors.initials: JI
authors.lastname: Lo
authors.affiliation: B-1, Indus-1, Atomic Molecular Physics Division, BARC at RRCAT, Indore 452013, India.
authors.forename: B N Raja
authors.initials: BN
authors.lastname: Sekhar
authors.affiliation: National Synchrotron Radiation Research Center, Hsinchu, Taiwan.
authors.forename: Bing-Ming
authors.initials: BM
authors.lastname: Cheng
authors.affiliation: Department of Chemistry, Indian Institute of Technology - Madras, Chennai, India.
authors.forename: Thalappil
authors.initials: T
authors.lastname: Pradeep
authors.affiliation: Department of Physical Sciences, The Open University, Milton Keynes MK7 6AA, United Kingdom.
authors.forename: Nigel John
authors.initials: NJ
authors.lastname: Mason