Erratum “Infrared spectroscopy of 2ν4 and ν₃ + 2ν₄ band of the NO₃ radical” [J. Mol. Spectrosc. 334 (2017) 10–21](S0022285217300255)(10.1016/j.jms.2017.02.008)

The most serious point of the present erratum is Eq. (30), which gives a relation between the vibronic interaction constant h₃ and the effective spin-orbit interaction constant a_eff3. When Eq. (30) is compared with Eq. (7) of our earlier paper [J. Mol. Spectrosc. 314 (2015) 73], we noticed a difference by a factor of two. [Note h₃ of Eq. (30) equals λ of Eq. (7)] Although the reason why the factor is included in the later expression is not clear now, it is thought that the sigma value of 1/2 included. For keeping consistency with Eq. (7) of the 2015 paper, Eq. (30) of our 2017 paper should read [Formula presented] Correspondingly the determined h₃ value is decreased from 2332 cm⁻¹ by a factor of square root (2) to 1649 cm⁻¹. There are two vibronic interaction mechanisms through the ν₃ and ν₄ vibrational modes. The vibronic interaction constant h₄ related to the ν₄ mode has been determined by a photoelectron study of Weaver et al., and the h₃ constant is first estimated in the present paper. This correction is important for further understanding of vibronic interaction. The following points are also found as typos, which do not change any conclusions, but are included for completeness. (1) Page 15 the left-side: line 16 ξ = 0.05 The ξ coefficient is used to estimate the v₄ = 4 energy of 1609 cm⁻¹, where the energy value is not changed.(2) It was found that the fourth and fifth terms of Eq. (15) have larger coefficients by a factor of square root (2). [Formula presented] By changing these coefficients, Eqs. (17) and (18) are changed, as follows, [Formula presented] (3) Eq. (26) is for the ν₃ mode, where we corrected typos, [Formula presented] (4) In Table 2 we found the following typos, where the first two are due to our mistake.Table 2 line 21, 22, 33, and 40 should read [Formula presented] (5) Eq. (5) should read [Formula presented].