J. Kreile et al., PHOTOELECTRON ANGULAR-DISTRIBUTION PARAMETERS OF VALENCE SHELL IONIZATIONS OF ALLENE AND TRANSIENT KETENE AND THIOKETENE, Journal of molecular structure, 300, 1993, pp. 149-156
Photoelectron angular distribution parameters for the X2E ionization o
f allene and, for the first time, for ionizations of reaction intermed
iates, namely the X2B1 ionization of ketene and the X2B1, A2B2 and B2B
1 ionizations of thioketene have been measured using synchrotron radia
tion up to photon energies of 23.0, 20.0 and 19.5 eV, respectively. Th
e beta curves exhibit several structures which could stem from resonan
ce phenomena. Indications of an autoionization resonance were found in
the X2E ionization of allene and for a shape resonance in the X2B1 io
nization of thioketene.