Photoelectron angular distribution parameters of valence shell ionizations of allene and transient ketene and thioketene

Article abstract of DOI:10.1016/0022-2860(93)87013-Y

Photoelectron angular distribution parameters for the X²E ionization of allene and, for the first time, for ionizations of reaction intermediates, namely the X²B₁ ionization of ketene and the X²B₁, A²B₂ and B²B₁ ionizations of thioketene have been measured using synchrotron radiation up to photon energies of 23.0, 20.0 and 19.5 eV, respectively.The β curves exhibit several structures which could stem from resonance phenomena.Indications of an autoionization resonance were found in the X²E ionization of allene and for a shape resonance in the X²B₁ ionization of thioketene.