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

Abstract

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 (similar to10.3 eV) to 21.64 eV. The ionizations considered are S+(S-4)<--S(P-3), S+(D-2)<--S(P-3) and S+(P-2)<--S(P-3), and SH+(X(3)Sigma(-), v(+) = 0)<--SH(X(2)Pi, v = 0), SH+(a(1)Delta, v(+) = 0)<--SH(X(2)Pi, v = 0) and SH+(b(1)Sigma(+), v(+) = 0)<--SH(X(2)Pi, v = 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.