title: Valence and ionic lowest-lying electronic states of ethyl formate as studied by high-resolution vacuum ultraviolet photoabsorption, He(I) photoelectron spectroscopy, and ab initio calculations.
abstract: The highest resolution vacuum ultraviolet photoabsorption spectrum of ethyl formate, C2H5OCHO, yet reported is presented over the wavelength range 115.0-275.5 nm (10.75-4.5 eV) revealing several new spectral features. Valence and Rydberg transitions and their associated vibronic series, observed in the photoabsorption spectrum, have been assigned in accordance with new ab initio calculations of the vertical excitation energies and oscillator strengths. Calculations have also been carried out to determine the ionization energies and fine structure of the lowest ionic state of ethyl formate and are compared with a newly recorded He(I) photoelectron spectrum (from 10.1 to 16.1 eV). New vibrational structure is observed in the first photoelectron band. The photoabsorption cross sections have been used to calculate the photolysis lifetime of ethyl formate in the upper stratosphere (20-50 km).
authors.affiliation: Department of Control and Energy Engineering, Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, Poland.
authors.forename: M A
authors.initials: MA
authors.lastname: Śmiałek
authors.affiliation: Department of Theoretical Physic and Quantum Information, Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Łabuda
authors.affiliation: Department of Theoretical Physic and Quantum Information, Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, Poland.
authors.forename: J
authors.initials: J
authors.lastname: Guthmuller
authors.affiliation: Département de Chimie, Université de Liège, Institut de Chimie-Bât. B6C, B-4000 Liège, Belgium.
authors.forename: M-J
authors.initials: MJ
authors.lastname: Hubin-Franskin
authors.affiliation: Département de Chimie, Université de Liège, Institut de Chimie-Bât. B6C, B-4000 Liège, Belgium.
authors.forename: J
authors.initials: J
authors.lastname: Delwiche
authors.affiliation: Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM), UMR CNRS 8523, Université Lille1 Sciences et Technologies, F-59655 Villeneuve d' Ascq Cedex, France.
authors.forename: D
authors.initials: D
authors.lastname: Duflot
authors.affiliation: Department of Physical Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, United Kingdom.
authors.forename: N J
authors.initials: NJ
authors.lastname: Mason
authors.affiliation: ISA, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, Building 1520, DK-8000 Aarhus C, Denmark.
authors.forename: S V
authors.initials: SV
authors.lastname: Hoffmann
authors.affiliation: ISA, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, Building 1520, DK-8000 Aarhus C, Denmark.
authors.forename: N C
authors.initials: NC
authors.lastname: Jones
authors.affiliation: Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
authors.forename: P
authors.initials: P
authors.lastname: Limão-Vieira