Zero-kinetic-energy pulsed-field ionization spectroscopy of the a1Δ state of SH+ (SD+)

Abstract

The results of a zero-kinetic-energy pulsed-field ionization study on the a 1Δ (v+ = 0) excited ionic state of SH+ (SD+) obtained via two-photon excitation of the [a 1Δ]3dπ 2Φ (v′ = 0) Rydberg state and subsequent one-photon pulsed-field ionization are reported. Accurate ionization energies as well as rotational constants are obtained. A detailed comparison between the rotational branching ratios resulting from the pulsed-field ionization process and those of a direct ionization process is made. The results elucidate the dynamics of the high-n Rydberg states involved in pulsed-field ionization of SH (SD). © 1996 American Institute of Physics.