https://doi.org/10.1007/s10053-000-8806-0
Fluorescence of jet-cooled naphthalene: Emission spectra, lifetimes and quantum yields
1
Observatoire de Besançon,
B.P. 1615,
25010 Besançon Cedex, France
2
Laboratoire de Photophysique Moléculaire,
CNRS, Université Paris-Sud,
bâtiment 210, 91405 Orsay Cedex, France
Received:
15
April
1999
Revised:
16
July
1999
Published online: 13 August 2013
Fluorescence spectra of naphthalene, C10H8, were obtained in the
laboratory under conditions which provide an appropriate simulation of the
cometary conditions: super-cooled gas phase molecules in a
collision-free environment. Five spectra were recorded, the excitation
energies ranging from 1422 to 5293 cm-1 above the first electronic state
at 32 020 cm-1. A comparison with previous jet-cooled naphthalene
fluorescence spectra obtained by Beck
et al. [CITE] and Hermine
[CITE] shows that
the former results are not consistent with the present ones. Spectra obtained
by Beck et al. show weaker intensities at greater wavelengths compared to
those obtained by Hermine and ourselves. We also measured the
fluorescence lifetimes by recording the fluorescence decay as a function of
time after the excitation of the molecules by monochromatic lasers and deduced
the fluorescence quantum yields. A synthetic emission spectrum under solar
irradiation is obtained for astrophysical implications.
PACS: 33.50.-j – Fluorescence and phosphorescence; radiationless transitions, quenching (intersystem crossing, internal conversion) / 96.50.Gn – Comets
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000
