Synchrotron radiation induced fluorescence spectroscopy of SF6

The fluorescence of gaseous SF6 was investigated after excitation with 25–80 eV synchrotron radiation photons. The total UV–Vis–near IR fluorescence yield was recorded and interpreted in terms of inner valence excitations/ionizations and double excitations in SF6. Dispersed fluorescence measurements in the 400–1000 nm spectral range reveal excited S, S+, F and F+ fragments as solely responsible for the emission. The fluorescence intensity of some of the observed atomic transitions was monitored as a function of the excitation energy. Single, double and triple excitations as well as direct ionizations and shake-ups are proposed as the triggering processes responsible for the creation of the emitting fragments.

[1]  Masahiro Kato,et al.  Single-hole one-electron superexcited states and doubly excited states of methane in the vacuum ultraviolet range as studied by dispersed fluorescence spectroscopy , 2002 .

[2]  R. Browning,et al.  Negative photoion spectroscopy of SF6 in the inner valence and S 2p energy regions , 2002 .

[3]  James K. Olthoff,et al.  Electron Interactions With SF6 , 2000 .

[4]  A. Yencha,et al.  Threshold photoelectron spectroscopy in the inner-valence ionization region and photo-double ionization of SF6 , 2000 .

[5]  D. Peterka,et al.  Dissociative photoionization dynamics of SF6 by ion imaging with synchrotron undulator radiation , 1999 .

[6]  H. Ågren,et al.  Energy-dependent valence photoelectron spectra of SF6. Ab initio calculations and measurements , 1998 .

[7]  K. Prince,et al.  The gas phase photoemission beamline at Elettra , 1998, Journal of synchrotron radiation.

[8]  U. Müller,et al.  Projectile fragment–ion fragment–ion coincidences (PFIFICO) following fast ion impact on SF6 , 1998 .

[9]  A. Yencha,et al.  Threshold photoelectron spectroscopy of SF6 , 1997 .

[10]  D. Holland,et al.  AN EXPERIMENTAL AND THEORETICAL STUDY OF THE VALENCE SHELL PHOTOELECTRON SPECTRUM OF SULPHUR HEXAFLUORIDE , 1994 .

[11]  K. Leung,et al.  Absolute transition probability measurement of nondipole valence-shell (7-70 eV) electronic transitions of SF6 by angle-resolved electron energy loss spectroscopy , 1993 .

[12]  J. C. Creasey,et al.  Fragmentation of valence electronic states of CF + 4 and SF + 6 studied by threshold photoelectron-photoion coincidence spectroscopy , 1993 .

[13]  S. McSweeney,et al.  A study of the absolute photoabsorption cross section and the photoionization quantum efficiency of sulphur hexafluoride from the ionization threshold to 420 A , 1992 .

[14]  I. Koyano,et al.  Negative‐ion mass spectrometric study of ion‐pair formation in the vacuum ultraviolet. III. SF6→F−+SF+5 , 1990 .

[15]  C. E. Brion,et al.  Inner-shell and valence-shell electronic excitation of SF6, SeF6 and TeF6 by high energy electron impact: An investigation of potential barrier effects , 1990 .

[16]  J. Tse,et al.  A comparison of valence level photoelectron cross sections for SF6, SeF6 and “F6” from 21 eV to 100 eV photon energy , 1989 .

[17]  K. Becker,et al.  Continuous ultraviolet emissions produced by electron impact on SF6 and NF3 , 1988 .

[18]  K. Becker,et al.  Absolute cross sections for fluorine 3p→3s line emissions following single electron impact on NF3, CF4, and SF6 , 1987 .

[19]  D. A. Shirley,et al.  Resonance effects on the inner-valence levels of SF6 in the photon-energy range 52–72 eV , 1987 .

[20]  D. Dill,et al.  Photoelectron branching ratios and angular distributions for the valence levels of SF/sub 6/ in the range 16< or =h. nu. < or =30 eV , 1982 .

[21]  A. Hitchcock,et al.  Absolute oscillator strengths (5-63 eV) for photoabsorption and ionic fragmentation of SF6 , 1979 .

[22]  Joseph L. Dehmer,et al.  Evidence of Effective Potential Barriers in the X‐Ray Absorption Spectra of Molecules , 1972 .

[23]  V. Nefedov.  Quasistationary states in X-ray absorption spectra of chemical compounds , 1970 .