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Chernyshov, A K; Mikheyev, P A; Ufimtsev, N I
Journal of quantitative spectroscopy & radiative transfer, January 2021, 2021-01-00, Letnik: 258Journal Article
•Pressure shift and broadening rates of 640.2 nm neon line were measured.•Natural neon isotope mix requires specially designed spectral line profile.•Cheap multi-mode diode lasers can be tailored for spectroscopy needs.•Starters for fluorescent lamps can produce reference optical frequency. Measurements of pressure broadening and shift coefficients for 640.2 nm Ne line were performed in an RF discharge without stabilization of neutral gas temperature. A diode laser with a short external cavity was used for metastable neon absorption spectroscopy in a natural mixture of neon isotopes. An appropriate fit function was constructed permitting deduction of Doppler and Lorentz components for the Voigt profile of the spectral line. To determine pressure broadening ξ and shift β coefficients for pure Ne and Ne:He mixture we used the information about Lorentz linewidth, position of the line center and gas temperature derived from spectral line shape fitted to a model line profile. The values of the collisional coefficients reduced to 300 K in units of 10-10 s-1 cm3, are ξNe-Ne = (1.9±0.2), ξNe-He = (3.4±0.2); βNe-Ne = -(0.7±0.1), βNe-He = (0.13±0.04).
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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