Rotational analysis of the vibrational hot bands of N2+ (A 2Πu–X 2Σg+) in the near-infrared region using velocity modulation spectroscopy

Observation of TiF+by Velocity Modulation Laser Spectroscopy and Analysis of the [17.6]3Δ–X3Φ System

“…The value modulation technique (23, 24) to eliminate signals from neutral species. A Coherent 899-29 ring cw dye laser running we obtained for the rotational temperature was approximately 350 K. The fact that T rot Ç T discharge , while T trans ú either with R110 or R6G dyes and pumped by an Ar / laser (Coherent CR20) was employed to record the spectrum of T rot , has already been observed in the positive column of AC discharges when He is used as buffer gas (29,30). TiF / in the region between 16 800 and 18 600 cm 01 .…”

UV Laser Spectroscopy Using the Velocity-Modulation Technique: New Hot Bands of the B2Σ+u–X2Σ+g System of N+2

“…why they were never noticed. In addition it is well known that our discharge conditions favored a high vibrational temperature (12).…”

“…However the most striking improvement concerns the newly determined values for the spin-orbit constants of the v A ϭ 14, 20 levels. Indeed, by considering the vibrational dependence of A v for v A Յ 11 (6,12,15, and references therein), our fitted values show a discrepancy of 10 Ϫ1 cm Ϫ1 from the extrapolated ones, to be compared to 1 cm Ϫ1 for v A ϭ 14 in Ref. (13).…”

“…The detailed analysis of the spectra was performed by fixing the value of the lower state rotational constants to the most precise one, i.e., obtained by studying the Meinel system in the IR, NIR, and visible range [for vЉ ϭ 0, 1, 2, 3, 4, 5, 6 see Refs. (29,12,12,11,12,12,30), respectively]. A standard 2 ⌸-2 ⌺ Hamiltonian was employed to describe the interactions between the rovibrational levels of both the B 2 ⌺ u ϩ and A 2 ⌸ u states (13,31,6).…”

The Rotational Structure of the (7, 4) and (7, 2) Bands of the A2Πu–X2Σg+ System of N2+ Studied by Velocity Modulation Laser Spectroscopy

“…In recent years the A 2 u -X 2 + g system of N + 2 has been intensively studied by this technique (2)(3)(4)(5)(6)(7)(8)(9). The (8, 3), (7,3), and (6, 3) bands have been analyzed by Lindgren et al (2), Radunsky and Saykally (3), and Bachir et al (4), respectively.…”