An initial investigation of S and SH with angle resolved photoelectron spectroscopy using synchrotron radiation

An initial investigation of the photoionization behaviour of S atoms and SH radicals has been made in the gas-phase using angle resolved photoelectron spectroscopy (PES) with radiation from the Elettra synchrotron as the photon source. Angular distributions and relative photoionization cross-sections have been measured for S and SH as a function of photon energy from threshold (10.3 eV) to 21.64 eV. The ionizations considered are Sþ(4S) S(3P), Sþ(2D) S(3P) and Sþ(2P) S(3P), and SHþ(X3R, vþ ¼ 0) SH(X2P, v00 ¼ 0), SHþ(a1D, vþ ¼ 0) SH(X2P, v00 ¼ 0) and SHþ(b1Rþ, vþ ¼ 0) SH(X2P, v00 ¼ 0). This study of S and SH follows a recent investigation on atomic oxygen where the feasibility of angle resolved PES measurements on reactive intermediates at the Elettra synchrotron source was demonstrated, and further studies on small molecular radicals were proposed.