High pressure line shapes of the Rb D1 and D2 lines for 4He and 3He collisions

Miller, Wooddy S.; Rice, Christopher A.; Hager, Gordon D.; Rotondaro, Matthew D.; Berriche, H.; Perram, Glen P.

doi:10.1016/j.jqsrt.2016.06.027

Cited by 21 publications

(8 citation statements)

References 40 publications

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“…0.6 to 20 bar and 330 K to 530 K, respectively [33,34]. For the D2-line, a much smaller pressure shift of about (0.29 ± 0.11) GHz/bar has been reported at lower pressures [33,34].…”

Section: Results Of Rubidium-helium Gas Mixture Spectroscopymentioning

confidence: 96%

Spectroscopy of high pressure rubidium-noble gas mixtures

Ockenfels,

Roje,

Hövel

et al. 2022

Preprint

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“…0.6 to 20 bar and 330 K to 530 K, respectively [33,34]. For the D2-line, a much smaller pressure shift of about (0.29 ± 0.11) GHz/bar has been reported at lower pressures [33,34].…”

Section: Results Of Rubidium-helium Gas Mixture Spectroscopymentioning

confidence: 96%

Spectroscopy of high pressure rubidium-noble gas mixtures

Ockenfels,

Roje,

Hövel

et al. 2022

Preprint

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“…It should be noted that observed spectra of highly pressure broadened alkali metals exhibit asymmetric line shapes not modeled in the present study. 54 A study of the atmospheric transmission for a 1 km horizontal homogenous path at 1 atm and 273.15 K and 50% relative humidity was modeled using LBLRTM and compared with the modeled DPAL emission from the D 1 Voigt line shapes using the hyperfine structure, for 0, 1, and 10 atm of He, and 100 Torr of ethane and have shown overlap of DPAL laser emission with atmospheric absorption lines. 55,56 The simulation with only 100 Torr C 2 H 6 is enough buffer gas to blend the hyperfine structure, especially in potassium.…”

Section: Resultsmentioning

confidence: 99%

Open-Path Atmospheric Transmission of Diode-Pumped Alkali Lasers in Maritime and Desert Environments

et al. 2023

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A tunable diode laser absorption spectroscopy (TDLAS) device has been developed to study long path atmospheric transmission for laser weapons applications. By employing a single aperture and retro reflector in a mono-static configuration, the noise associated with atmospheric and platform jitter were reduced by a factor of ∼ 30 and the open-air path length was extended to 4.4 km. Water vapor absorption lines near the rubidium (Rb) and cesium (Cs) variants of the Diode Pumped Alkali Laser (DPAL) near 795 and 894 nm, oxygen lines near the potassium (K) DPAL near 770 nm, and water vapor absorption in the vicinity of the Nd:YAG 1.064 um and Chemical Oxygen Iodine Laser (COIL) 1.3 um lines were studied. The detection limit for path absorbance increases from ΔA = 0.0017 at 100 m path to 0.085 for the 4.4 km path. Comparison with meteorological instruments for maritime and desert environments yields agreement for the 2.032 km path to within 1.5% for temperature, 4.5% for pressure and 5.1% for concentration while agreements for the 4.4 km path are within 1.4% for temperature, 7.7% for pressure and 23.5% for concentration. An ICOS device was also used as a spectral reference to verify location of atmospheric lines. Implications of TDLAS collection system design on signal-to-noise are discussed as well as the effect of path turbulence on baseline noise.

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“…The emission spectra of Rb + He is of great interest for DPAL laser applications. The D2 line of rubidium when perturbed by helium has been observed to have a satellite peak at 735nm [6]. The location of this peak can be predicted by collisional line shape models operating in the quasistatic limit [14] using the equation for the intensity measured relative to line center,…”

Section: Satellite Peakmentioning

confidence: 99%

“…The buffer gas is used to pressure broaden the alkali D2 line to match the pump bandwidth as well as facilitate the fine structure transition. This has driven recent interest in pressure broadened D1 and D2 line shapes [6][7][8][9][10] of alkali-metal atoms as well as fine structure transition rates [11,12].…”

Section: Introductionmentioning

confidence: 99%

Influence of basis-set size on the XΣ1/2+2 , A

2018

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potential energy curves for Rb + He are computed at the spin-orbit multi-reference configuration interaction level of theory using a hierarchy of Gaussian basis sets at the double-zeta (DZ), triple-zeta (TZ), and quadruple-zeta (QZ) level of valence quality. Counterpoise and Davidson-Silver corrections are employed to remove basis set superposition error and ameliorate size consistency error. An extrapolation is performed to obtain a final set of potential energy curves in the complete basis set limit (CBS). This yields four sets of systematically improved X 2 Σ + 1/2 , A 2 Π 1/2 , A 2 Π 3/2 and B 2 Σ + 1/2 potential energy curves that are used to compute the A 2 Π 3/2 bound vibrational energies, the position of the D2 blue satellite peak, and the D1 and D2 pressure broadening and shifting coefficients, at the DZ, TZ, QZ, and CBS level. Results are compared with previous calculations and experimental observation.

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High pressure line shapes of the Rb D1 and D2 lines for 4He and 3He collisions

Cited by 21 publications

References 40 publications

Spectroscopy of high pressure rubidium-noble gas mixtures

Spectroscopy of high pressure rubidium-noble gas mixtures

Open-Path Atmospheric Transmission of Diode-Pumped Alkali Lasers in Maritime and Desert Environments

Influence of basis-set size on the XΣ1/2+2 , A

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