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 ξ_Ne-Ne = (1.9±0.2), ξ_Ne-He = (3.4±0.2); β_Ne-Ne = -(0.7±0.1), β_Ne-He = (0.13±0.04).

在没有中性气体温度稳定的情况下，在RF放电中对640.2nm Ne线的压力展宽和移动系数进行了测量。具有短外腔的二极管激光器用于氖同位素的天然混合物中的亚稳态氖吸收光谱。构建适当的拟合函数，以允许扣除谱线的Voigt轮廓的多普勒分量和洛伦兹分量。为了确定纯Ne和Ne：He混合物的压力增宽ξ和移动β系数，我们使用了与洛伦兹线宽，线中心位置和气体温度有关的信息，这些信息来自拟合模型线轮廓的光谱线形状。碰撞系数的值以10为单位减小到300 K^-10  s ^-1  cm ³，ξNe _-Ne  =（1.9±0.2），ξNe _-He  =（3.4±0.2）；β_氖-氖 = - （0.7±0.1），β_氖他 =（0.13±0.04）。