TY - JOUR
T1 - High resolution Spectroscopy of jet-cooled naphthaleneNaphthalene: the 000 and 3301 Bands of the Ã1B1uX~1Ag Transition
T2 - The 00 0 and 330 1 bands of the Ã1B1u ← X˜Ag transition
AU - O'Reilly, John
AU - Joo, Duck Lae
AU - Takahashi, Rika
AU - Katô, Hajime
AU - Baba, Masaaki
PY - 2002
Y1 - 2002
N2 - Rotationally resolved excitation spectra of the 000 and 3301 bands of the Ã1B1u ← X̃1Ag electronic transition of naphthalene were measured by a frequency-doubled single-mode tunable laser and a jet-cooled collimated molecular beam. The observed linewidth was 18 MHz, and the absolute wavenumber was determined with an accuracy of better than 0.0002 cm-1. The molecular constants of the X̃1Agg(v = 0), Ã1B1u(v = 0), and Ã1B1u(v33 = 1) levels were determined and represent the most accurate measurements to date. Three rotational constants were sufficient to fit 3386 lines of J = 1-43 and Ka = 0-21 with a standard deviation 0.0002 cm-1. This indicates that the molecular structures are rigid both in the X̃1Ag and Ã1B1u states. When a magnetic field was applied, spectral line broadening was observed for levels with small Ka value in the Ã1B1u(v33 = 1) state, and the Zeeman splitting was observed to increase with increasing J. No broadening, however, was observed in the 000 band up to H = 0.65 T.
AB - Rotationally resolved excitation spectra of the 000 and 3301 bands of the Ã1B1u ← X̃1Ag electronic transition of naphthalene were measured by a frequency-doubled single-mode tunable laser and a jet-cooled collimated molecular beam. The observed linewidth was 18 MHz, and the absolute wavenumber was determined with an accuracy of better than 0.0002 cm-1. The molecular constants of the X̃1Agg(v = 0), Ã1B1u(v = 0), and Ã1B1u(v33 = 1) levels were determined and represent the most accurate measurements to date. Three rotational constants were sufficient to fit 3386 lines of J = 1-43 and Ka = 0-21 with a standard deviation 0.0002 cm-1. This indicates that the molecular structures are rigid both in the X̃1Ag and Ã1B1u states. When a magnetic field was applied, spectral line broadening was observed for levels with small Ka value in the Ã1B1u(v33 = 1) state, and the Zeeman splitting was observed to increase with increasing J. No broadening, however, was observed in the 000 band up to H = 0.65 T.
UR - http://www.scopus.com/inward/record.url?scp=0036026314&partnerID=8YFLogxK
U2 - 10.1006/jmsp.2002.8625
DO - 10.1006/jmsp.2002.8625
M3 - Article
AN - SCOPUS:0036026314
SN - 0022-2852
VL - 215
SP - 155
EP - 159
JO - Journal of Molecular Spectroscopy
JF - Journal of Molecular Spectroscopy
IS - 1
ER -