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High-resolution Fourier transform Raman spectra of the fundamental bands of 14N15N and 15N2

✍ Scribed by Jørgen Bendtsen

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
129 KB
Volume
32
Category
Article
ISSN
0377-0486

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✦ Synopsis

The Fourier transform Raman spectra of the fundamental bands of 14 N 15 N and 15 N 2 were measured with a resolution of 0.02 cm -1 . Lines from all branches (O, Q, S) were observed and measured. The analyses of the wavenumbers yield improved values for the band origins n 0 . 14 N 15 N/ = 2291.33773.8/ cm -1 and n 0 . 15 N 2 / = 2252.07846.9/ cm -1 and improved values for the rotational parameters of the ground state and the first excited state of the two molecules. The values obtained for 14 N 15 N are B 0 = 1.9236102.35/ cm -1 and D 0 = 5.3530.94/ × 10 -6 cm -1 and B 1 -B 0 = -0.01651064.86/ cm -1 and D 1 -D 0 = 1.06.16/ × 10 -8 cm -1 . For 15 N 2 the following values obtained are B 0 = 1.8576250.36/ cm -1 , D 0 = 4.9760.87/, B 1 -B 0 = 0.01566657.99/ cm -1 and D 1 -D 0 = 0.94.18/ × 10 -8 cm -1 . The bond length calculated for all three isotopomers of molecular nitrogen shows a systematic decrease with increasing molecular mass.

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