Absorption spectrum of the b'¹Σ_u⁺from X¹Σ_g⁺transition of the N₂molecule excited by the flash discharge technique

Improved Fits for the Vibrational and Rotational Constants of Many States of Nitrogen and Oxygen

“…The Bv measurements of Dieke and Heath (1959), Roux et al (1983), Verma (1984), and Carroll and Croke (1989) for the B 3U g state of N2 are plotted in Fig. 6.…”

“…Similar, additional data not given in the figure are measurements of Bo by Stoicheff 1954, Lofthus (1960), Vanderslice et al (1965), and Butcher et al (1971); less accurate measurements of Bv for v = 0 through 14 may be found in Watson and Koontz (1934) and Spinks (1942). The figure shows that the CUlVe computed using the constants given by Huber and Herzberg (1979) fits the available data very well, so these constants are listed in Table 2. The vibrational data of Dieke and Heath (1959), Tanaka and Jursa (1961), Roux et al (1983), and Verma (1984) for theA 3Ij state of N2 are plotted in Fig. 3.…”

Improved Fits for the Vibrational and Rotational Constants of Many States of Nitrogen and Oxygen

“…For example, absorption measurements by Verma and Jois (1984) for N In some cases band head data, although not as accurate as band origin data, were used to calculate vibrational energy intervals as a means of extending the data to higher vibrational levels. Rotational constants B, on the other hand, are generally available from published reports so that derivation of these quantities by analysis of the rotational line positions was not required.…”

Experimental and coupled‐channels investigation of the radiative properties of the N2c′41Σu+ − X1Σg+ band system

“…Radiative parameters, such as transition probabilities, between the singlet ungerade levels and vibrationally excited levels of the X 1 Σ g + state, however, are generally unavailable. Although the photoabsorption of vibrationally excited N 2 prepared in a discharge has been reported [ Verma and Jois , 1984], no accurate intensity measurements for transitions involving the v i > 0 levels of the X 1 Σ g + state are available, presumably because of difficulty in quantifying the relative populations of the vibrationally excited states. While the discharge‐emission work of Roncin et al [1998, 1999] is extremely valuable for the determination of accurate line positions and energy term values, it yields very little information on emission properties, primarily due to the optically thick nature of the experiments.…”