Perfluorocyclobutane electronic state spectroscopy by high-resolution vacuum ultraviolet photoabsorption, electron impact, He I photoelectron spectroscopy, and ab initio calculations

Journal Article · Sat Sep 15 00:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.032509· OSTI ID:21015969

Limao-Vieira, P ^[1]; Vasekova, E; Mason, N J ^[2]; Giuliani, A ^[3]; Lourenco, J M. C. ^[1]; Santos, P M ^[4]; Duflot, D ^[5]; Hoffmann, S V ^[6]; Delwiche, J; Hubin-Franskin, M -J ^[3]

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1. Laboratorio de Colisoes Atomicas e Moleculares, Departamento de Fisica, CEFITEC, Universidade Nova de Lisboa, P-2829-516 Caparica (Portugal)
2. Centre of Molecular and Optical Sciences, Department of Physics and Astronomy, Open University, Walton Hall, Milton Keynes MK7 6AA (United Kingdom)
3. Laboratoire de Spectroscopie d'Electrons diffuses, Universite de Liege, Institut de Chimie-Bat. B6c, B-4000 Liege 1 (Belgium)
4. Instituto de Telecomunicacoes, IST, Avenida Rovisco Pais, P-1049-001 Lisbon (Portugal)
5. Laboratoire de Physique des Lasers, Atomes et Molecules (PhLAM), UMR CNRS 8523, Centre d'Etudes et de Recherches Lasers et Applications CERLA (CNRS 2416), Universite des Sciences et Technologies de Lille, F-59655 Villeneuve d'Ascq Cedex (France)
6. Institute for Storage Ring Facilities, University of Aarhus, Ny Munkegade DK-8000, Aarhus C (Denmark)

The electronic state spectroscopy of perfluorocyclobutane (c-C{sub 4}F{sub 8}) has been investigated using high resolution vacuum ultraviolet (vuv) photoabsorption spectroscopy in the energy range 6.0-11 eV. The electron energy loss spectrum (EELS) was also recorded in the nonelectric dipolar interaction mode (100 eV incident energy, 10 deg. scattering angle) over the 8-14 eV energy-loss range and the excited states in the 11-14 eV spectral region have been observed. An He I photoelectron spectrum recorded between 11.0 and 19.8 eV is compared with earlier lower resolution results. This has allowed us to derive a more precise value of 12.291{+-}0.002 eV for the ground neutral state vertical ionization energy. All spectra presented in this paper represent the highest resolution data yet reported for perfluorocyclobutane, to the best of our knowledge. Ab initio calculations have been performed for helping in the assignment of the spectral bands for both neutral excited states and ionic states.

• OSTI ID: 21015969
• Journal Information: Physical Review. A, Vol. 76, Issue 3; Other Information: DOI: 10.1103/PhysRevA.76.032509; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CARBON COMPOUNDS
ELECTRON-MOLECULE COLLISIONS
ELECTRONS
ENERGY LOSSES
ENERGY-LOSS SPECTROSCOPY
EV RANGE
EXCITED STATES
FAR ULTRAVIOLET RADIATION
FLUORINE COMPOUNDS
GROUND STATES
INTERACTIONS
IONIZATION
ORGANIC COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
RESOLUTION
SCATTERING
ULTRAVIOLET SPECTRA