Electronic absorption spectroscopy of molecular ions in plasmas by dye laser velocity modulation: The A←X system of N+2

Abstract

A computer controlled velocity modulation dye laser spectrometer is used to measure the A 2Πu←X 2Σ+g (7,3) band of N+2. The Doppler-limited absorption spectra are fit to a model Hamiltonian to obtain precise parameters for the states. The ion rotational temperature was determined to be 461±11, and the translational temperature was estimated to be near 1200 K.

Fine and Hyperfine Structure in14N+2: TheB2Σ+u–X2Σ+g(0, 0) Band

“…The lambda-doubling parameters (q ϩ p/ 2) and q are interpolated from data in Refs. (15) and (16). All other fixed parameters are taken from Ref.…”

“…In this and subsequent work, profiles of single spin-rotation components, e.g., R 11ee (15), were modeled using calculated hyperfine splittings and intensities, together with a common Gaussian profile for all hyperfine components. More recently there has been interest in using low-N lines in this work (8).…”

Highly excited states of gerade symmetry in molecular nitrogen

“…It is therefore to be expected that the molecular constants of such a series also converge to the constants of the ionic state. In Table IX the constants of the ground state and the first excited state of the molecular ion [45][46][47][48] are listed. Based on the rotational B parameter, a first crude assignment can be made on the character of the excited state.…”

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

“…At first, in 1928 Herzberg observed the (2, 0), (3,1), and (4, 2) bands at low resolution (24). Then in 1932, Coster and Brons (25) recorded the (8,6) band.…”

“…The (6, 4) and (7,5) bands are observed for the first time. They are overlapped by the (2, 0), (3,1), (4,2), and (5, 3) bands. That could explain …”