title: Valence and Rydberg Excitations of 2,4- and 2,6-Difluorotoluene as Studied by Vacuum Ultraviolet Synchrotron Radiation and ab Initio Calculations.
abstract: Here we report novel comprehensive investigations on the electronic state spectroscopies of isolated 2,4- and 2,6-difluorotoluene in the gas phase by high-resolution vacuum ultraviolet (VUV) photoabsorption measurements in the 4.4-10.8 eV energy range, with absolute cross-section values derived. We also present the first set of ab initio calculations (vertical energies and oscillator strengths), which we have used in the assignment of valence transitions of the difluorotoluene molecules, together with calculated ionization energies to obtain the Rydberg transitions for both molecules. The measured absolute photoabsorption cross sections have been used to estimate the photolysis lifetimes of 2,4- and 2,6-difluorotoluene in the Earth's atmosphere.
authors: Departamento de Física, Universidade Federal do Paraná , Caixa Postal 19044, 81531-990 Curitiba, Paraná, Brazil.|Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa , 2829-516 Caparica, Portugal.
authors: A Souza
authors: AS
authors: Barbosa
authors: Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa , 2829-516 Caparica, Portugal.
authors: F Ferreira
authors: FF
authors: da Silva
authors: Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa , 2829-516 Caparica, Portugal.
authors: A
authors: A
authors: Rebelo
authors: ISA, Department of Physics and Astronomy, Aarhus University , Ny Munkegade 120, DK-8000, Aarhus C, Denmark.
authors: S V
authors: SV
authors: Hoffmann
authors: Departamento de Física, Universidade Federal do Paraná , Caixa Postal 19044, 81531-990 Curitiba, Paraná, Brazil.
authors: M H F
authors: MH
authors: Bettega
authors: Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa , 2829-516 Caparica, Portugal.
authors: P
authors: P
authors: Limão-Vieira