Measurement of absolute dipole oscillator strengths for pyridine: photoabsorption and the molecular and dissociative photoionization in the valence shell (4–200 eV)

• Published in: Journal of electron spectroscopy and related phenomena Vol. 123; no. 2; pp. 185 - 197
• Main Authors: Tixier, Sebastian, Cooper, Glyn, Feng, Renfei, Brion, C.E.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.05.2002
• Subjects: Absolute oscillator strength; Ionic fragmentation; Photoabsorption; Pyridine; Ionic fragmentation; Absolute oscillator strength; Pyridine; Photoabsorption
• ISSN: 0368-2048; 1873-2526
• DOI: 10.1016/S0368-2048(02)00019-1

Absolute photoabsorption oscillator strengths for the valence shell of pyridine have been measured using dipole (e,e) spectroscopy at high resolution (∼0.05 eV FWHM) and low resolution (∼1 eV FWHM) from 4 to 30 eV and from 5 to 200 eV, respectively. The absolute photoabsorption oscillator strength scale (±5%) has been determined using valence shell TRK (i.e. S(0)) sum-rule normalization. The accuracy of the absolute scale has been verified using the S(−2) sum rule and literature values of the dipole polarizability. The low resolution photoabsorption results have been combined with time of flight mass spectral data measured using dipole (e,e+ion) coincidence spectroscopy (∼1 eV FWHM), to determine the absolute oscillator strengths for the molecular and dissociative photoionization of pyridine at equivalent photon energies from the first ionization threshold up to 60 eV.