High-resolution incoherent Fourier transform Raman spectrum of the fundamental band of14N2

The high resolution FT Raman spectrum of the fundamental band of 14N2 has been measured with a resolution of 0.015 cm−1. Q-branch lines as well as O and S branch lines were measured. The analysis of the wavenumbers yields improved values for the rotational parameters of the ground state and the first excited state. The values obtained are B0 = 1.9895924(30) cm−1 and D0 = 5.7606(76)·10−6 cm−1 and B1 − B0 = −0.01736970(65) cm−1 and D1 − D0 = 10.43(20)·10−9 cm−1.