High resolution VUV photoabsorption cross section of dimethyl sulphoxide (CH3)2SO

Electronic excitation of carbonyl sulphide (COS) by high-resolution vacuum ultraviolet photoabsorption and electron-impact spectroscopy in the energy region from 4 to 11 eV

“…1 The present work is part of a wider research programme aimed at understanding the spectroscopy of sulphur-containing species and the role of these gases in atmospheric chemistry and physics (see, e.g., Refs. [2][3][4]. In order to model these processes in the stratosphere and troposphere, absolute photoabsorption cross sections (oscillator strengths) of such compounds are needed as well as a detailed knowledge of their electronic state spectroscopy.…”

A comprehensive and comparative study of elastic electron scattering from OCS and CS2 in the energy region from 1.2 to 200 eV

“…3 Studies on OCS have attracted considerable attention from the scientific community because it plays an important role in the global sulphur cycle, along with other sulphur containing molecules found in seawater namely, (CH 3 ) 2 S and (CH 3 ) 2 SO. 4,5 These molecules, while being precursors of sulphate aerosol particles and cloud condensation nuclei, can act as a feedback mechanism in climate regulation, affecting the Earth's radiative balance by direct scattering of solar radiation. OCS is also a source of biogenic sulphur, [6][7][8][9][10] and has been detected in the interstellar medium and in the upper atmospheres of Venus and Jupiter.…”

Photoabsorption and photodissociation studies of dimethyl sulphoxide (DMSO) in the 35,000–80,000 cm−1 region using synchrotron radiation

“…Quantum defects (QDs) are calculated using the standard Rydberg formula E n ¼IP-R/(n-δ l ) 2 , where, IP is the ionization potential, R is the Rydberg constant, n is the principal quantum number and δ l is the QD, which depends on orbital angular momentum quantum number l. QDs for Rydberg series of DMSO are close to the atomic QD values for sulphur atom, as expected [25]. A few bands, which were attributed to vibronic structure in earlier work [1], are found to overlap with higher members of Rydberg series (cf. Table 6) are overlapped with Rydberg series (identified on the basis of quantum defect analysis).…”

“…Subsequently, Sze et al [5] reported photoabsorption and electron energy loss studies together with some theoretical calculations. Recently, the photoabsorption spectrum of DMSO in the region 30,000-87,000 cm À 1 using synchrotron radiation (SR) has been reported by Drage et al [1]. However, Rydberg series and vibronic analysis of the observed transitions reported in literature [1,5] is incomplete and assignments by different authors are often at variance.…”

“…Recently, the photoabsorption spectrum of DMSO in the region 30,000-87,000 cm À 1 using synchrotron radiation (SR) has been reported by Drage et al [1]. However, Rydberg series and vibronic analysis of the observed transitions reported in literature [1,5] is incomplete and assignments by different authors are often at variance. The motivation behind the present work is to sort out some of these issues and obtain a complete set of Rydberg series and vibronic assignments for the electronic absorption spectrum of DMSO.…”