Infrared diode laser spectroscopy of the Δυ = 2 band of NaBr using spectrum processing by Fourier transformation

Spectrochimica acta. Part A: Molecular spectroscopy Pub Date : 1994-07-01 DOI:10.1016/0584-8539(94)E0049-G

Hiromichi Uehara, Koui Horiai, Yasushe Ozaki, Toici Konno

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引用次数: 3

Abstract

The IR diode laser spectrum of the Δυ = 2 band of NaBr monomer has been observed with a heat-pipe high-temperature cell of a White cell type. Fringes due to optical reflections inside the high-temperature White cell were inherent in highly-sensitive observation of the spectrum. However, they were eliminated, as were high-frequency noises, by Fourier manipulation of the observed diode laser spectrum. The υ = 2-0 up to 6–4 vibration—rotation bands of both Na⁷⁹Br and Na⁸¹Br, 199 lines in total, were assigned in the range between 550 and 600 cm⁻¹. These data, combined with 21 mm wave data from the literature, were analysed with a least squares fit to nine Dunham Y _ij coefficients. Y₁₀ and Y₂₀ for Na⁷⁹Br were determined to be 298.73648(66) and −1.21058(19) cm⁻¹, respectively.

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利用傅里叶变换对NaBr Δυ = 2波段的红外二极管激光光谱进行处理

用白细胞型热管高温电池观察了NaBr单体Δυ = 2波段的红外二极管激光光谱。在高灵敏度的光谱观测中，由于高温白细胞内部的光学反射而产生的条纹是固有的。然而，通过对观察到的二极管激光光谱进行傅里叶处理，它们和高频噪声一样被消除了。在550 ~ 600 cm−1范围内，Na79Br和Na81Br的振动旋转频带均为υ = 2-0 ~ 6-4，共199条谱线。这些数据，结合文献中的21毫米波数据，用最小二乘法拟合9个邓纳姆Y系数进行分析。Na79Br的Y10和Y20分别为298.73648(66)和- 1.21058(19)cm−1。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Spectrochimica acta. Part A: Molecular spectroscopy

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