The partition for fitting of the spectrum that contains both the cluster and monomer signals. The area I corresponds to the 1b 1 cluster, IIa is for the pure molecule 1b 1, the bottom IIb area is attributed half to 1b 1 cluster and the remainder to 3a 1 cluster, the area III is for 3a 1 both cluster and monomer, and the area IV is for 1b 2 cluster and monomer.
(Top panel) Photoelectron spectrum of a mixture of water clusters with monomers, recorded at a photon energy of 60 eV at an angle θ of 0° and at the “magic angle” of 54.7° (dotted and solid trace). (Bottom panel) The β parameter for different orbitals, as given in Table II .
Angular distribution parameter β for the outer valence orbitals of gas phase water molecules. Data from Ref. 2 have been interpolated to the photon energies of our study.
Angular distribution parameter β for the outer valence orbitals of a molecular jet containing a mixture of water molecules and water clusters. See text for details.
Angular distribution parameter β for the outer valence orbitals of water clusters. β cl (exp): measured, gas phase contribution removed (this work). β cl (model): single scattering model (this work). β (mol.): molecular β parameter, repeated from Table I for convenience. Error given for β cl (model) refers to the change of calculated β parameter upon 16% change of the elastic scattering cross section, used as an input. See text for details.
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