通过B2Σ⁺-X2Σ⁺和C2Π-X2Σ⁺能带系统分析研究BaI的X2Σ⁺和B2Σ⁺电子态

The BaI X2Sigma+ and B2Sigma+ Electronic States Through B2Sigma+-X2Sigma+ and C2Pi-X2Sigma+ Band Systems Analysis.

作者信息

Gutterres RF, Vergès J, Amiot C

机构信息

Laboratoire Aimé Cotton, C.N.R.S. II, Université Paris Sud, Bât. 505, Campus d'Orsay, Orsay Cedex, 91405, France

出版信息

J Mol Spectrosc. 1999 Jul;196(1):29-44. doi: 10.1006/jmsp.1999.7849.

DOI:10.1006/jmsp.1999.7849

PMID:10361056

Abstract

The near-infrared spectrum of the B2Sigma+-X2Sigma+ band system of the BaI molecule, obtained from the chemiluminescent reaction Ba + I2 and also by laser-induced fluorescence (LIF), was recorded by using Fourier transform spectroscopy (FTS). The LIF spectra were obtained by using a Ti:sapphire single-mode laser excitation. Resolved rotational data, originating from 32 vibrational levels (0 </= v </= 31) in the X2Sigma+ state and from 24 vibrational levels (0 </= v </= 19, and v = 21, 22, 23, 26) in the B2Sigma+ state, were used in the final analysis. Previously recorded data for the C2Pi-X2Sigma+ band system (with Deltav = 0), taken from C. A. Leach, A. A. Tsekouras, and R. N. Zare, J. Mol. Spectrosc. 153, 59-72 (1992), were added to the present work data field. Accurate and improved molecular constants for the X2Sigma+, B2Sigma+, and C2Pi states were derived from a simultaneous treatment of the whole data set. Copyright 1999 Academic Press.

摘要

通过傅里叶变换光谱法（FTS）记录了从化学发光反应Ba + I₂以及通过激光诱导荧光（LIF）获得的BaI分子B²Σ⁺-X²Σ⁺能带系统的近红外光谱。LIF光谱通过使用钛宝石单模激光激发获得。最终分析中使用了来自X²Σ⁺态的32个振动能级（0 ≤ v ≤ 31）和B²Σ⁺态的24个振动能级（0 ≤ v ≤ 19，以及v = 21、22、23、26）的分辨转动数据。先前记录的C²Π-X²Σ⁺能带系统（Δv = 0）的数据取自C. A. Leach、A. A. Tsekouras和R. N. Zare的《分子光谱学杂志》153卷，59 - 72页（1992年），并添加到当前工作的数据域中。通过对整个数据集的同时处理，得出了X²Σ⁺、B²Σ⁺和C²Π态的精确且改进的分子常数。版权所有1999年学术出版社。