Pressure effects on 2p⁵3p-2p⁵5d and 2p⁵3p-2p⁵6d transitions in neon

Abstract

T h e collisional broadening and shift of three spectral lines 486.3, 515.8 and 520.3 nm of neon emitted from a low-pressure glow discharge in pure neon and neon-helium mixtures have been measured. The values of pressure broadening and shift coefficients were determined. Our experimental data disagree with those resulting from the Kaulakys and Ueda theories of pressure effects on Rydberg states.

Broadening and Shift of Optical Lines of Argon Involving Quasi-Rydberg States

“…Pressure effects on optical lines originating from highly excited levels of alkali-metal and noble-gas atoms perturbed by gronnd-state atoms continue to be the subject of numerous i nvestigations [1][2][3][4][5][6][7][8][9][10]. Recent theoretical calculations of collisional widths and shifts of such spectral lines have been performed using a theory developed by Omont [11], Kaulakys [12] and Ueda [13] (hereafter referred to as OKU) which is based on the famous Fermi model [14] of Rydberg atom-normal atom interaction.…”

Some Remarks on Pressure Effects on 2p53p-2p5ns (n=5, 6, 7) Transitions in Neon

“…The values of β and δ coefficients determined by the least-square fit to linear relations (2) and (3) for Ne*-He and Ne*-Ne interactions are listed in Tables H and III, respectively. Let us note that for both Ne*-He and Ne*-Ne the positive values of δ coefficient were observed (δ > 0).…”

“…In a previous paper [2] we have measured the broadening and shift of the 486.3 nm Ne line (2p53p-2p5 6d) as a function of the discharge current. We have found that for glow discharge the Stark broadening of the 486.3 nm Ne line is completely negligible for discharge currents below 1.8 mA.…”

“…In the previous work done in this laboratory [2] Eq. (1) was used to determine the values of γL and γG of the Lorentzian and Gaussian half-width of neon spectral lines, the pressure shift Δ of their maxima as well as the values dk of the isotope shift.…”

“…In the previous papers from this laboratory the results of experiments concerning the pressure effects on spectral lines of neon arising from the transitions between configurations: 2p5 3p-2p5 nd (n = 4 [1], n = 5, 6 [2]), 2p5 3s-2p5 3p (λ = 540 nm [3]), 2p5 3p-2p5 ns (n = 5 [4], n = 6 [5]) were reported. Since there have been no experimental data on the influence of collisions on the neon states with n = 7 in the present investigation we have measured the profiles of the 494.5 nm Ne line which arises from the transitions between the 2p5 7s and 2p5 3p configurations.…”