Theoretical study of wings of resonance lines of lithium and sodium perturbed by rare gases

Abstract

Blue satellite structure of the Ba resonance line broadened by rare gases J. Chem. Phys. 97, 9492 (1992); 10.1063/1.463277Nearwing profile of the Yb 398.8 nm line broadened by rare gases AIP Conf.A theoretical and experimental study of the infrared line shape from resonance to the wings for uncoupled lines A new quantum mechanical method for the evaluation of intensities in the wings of allowed atomic spectral lines is reported. Mathematical and computational comparisons between classical and quantum mechanical methods are made. Wing intensities predicted from three sets of interaction potentials are compared with observed intensities for the red wing of the Li resonance line perturbed by He. Discussions of qualitative features of alkali metal-rare gas potentials and of satellite bands in the wings of the spectral lines of Li and Na perturbed by rare gases are given,

Theoretical study of pressure broadening of lithium resonance lines by helium atoms

“…At 670 K, our emission coefficients are in good agreement with experiment. [7] and previous theoretical calculations of Herman and Sando [10]. For the blue wing, the high and low pressure curves are identical.…”

“…Semi-classical calculations by Jungen and Staemmler [8] over a range of temperatures above 200 K have similar profile shapes to those we obtain with quantum-mechanical calculations. Measurements of the line profile at 670 K at high pressures have been carried out by Scheps et al [7] and calculations at high and low pressures in the red wing have been made by Herman and Sando [10]. In Fig.…”

“…The emission coefficient is defined as the number of photons with frequency between ν and (ν + dν) emitted per unit time per unit volume per unit frequency interval, which for bound-free transitions is given by [10,11,12] …”

Vibrational numbering and potential of the c 3Σ+ state of NaK determined from the c 3Σ+→a 3Σ+ transition

“…The performance of the program was verified by comparison with the BOUND-FREE program of Herman and Sando. 18 Initially, the potential curves used for simulations were the combined RKR and repulsive wall potential for the a 3 ⌺ ϩ state 12-14 and the RKR potential corresponding to the vibrational numbering with v 0 ϭ16 for the c 3 ⌺ ϩ state. 10 To our surprise, the simulated spectra differed from the experimental ones not only in the positions of the maxima and minima but also in the general appearance: instead of the observed regular oscillatory pattern we obtained rather complicated structures with irregularly changing intensities.…”

Adaptive focusing of an optical beam by a system with delay in the control channel

“…Another approach consists in calculating the profile from the potential and comparing it with experiment. The profile calculation may be quasi-static (Phillippe et a1 1979, Hanssen et a1 1979) or may use more refined quantum techniques (Herman and Sando 1978). This approach is very useful because it is not restricted to the quasi-static profile formulation and thus it may help separate the shortcomings of the profile calculation from those of the potential.…”