重新审视钠钾的基态X1Σ⁺

The Ground State X1Sigma+ of NaK Revisited.

作者信息

Krou-Adohi A, Giraud-Cotton S

机构信息

Département de Physique, F.A.S.T., Abidjan, Côte d'Ivoire

出版信息

J Mol Spectrosc. 1998 Aug;190(2):171-88. doi: 10.1006/jmsp.1997.7461.

DOI:10.1006/jmsp.1997.7461

PMID:9668010

Abstract

Laser-induced fluorescence (LIF) optical spectra of the D1Pi-X1Sigma+ system of the NaK molecule have been reinvestigated. In this new analysis, quantum numbers have been assigned to 3000 selected fluorescence lines for a wide range of vibrational and rotational levels (J </= 149, v' </= 23, v" </= 47). A new set of constants of the X1Sigma state (Dunham-type coefficients) and term values of the D1Pi state have been determined by a weighted least-squares fit of the LIF optical lines of the D-X system, some lines of the C-X system, and microwave spectral data reported recently. Constants for X1Sigma (in cm-1) are as follows: omegae = 123.993, omegaexe = 0.3045, Be = 0.095229, and alphae = 4.48 x 10(-4). The equilibrium internuclear distance is re = 3.49903 Å, very little changed from the microwave value. Copyright 1998 Academic Press.

摘要

已对NaK分子的D1Pi-X1Sigma+系统的激光诱导荧光（LIF）光谱进行了重新研究。在这项新分析中，已为一系列广泛的振动和转动能级（J≤149，v'≤23，v''≤47）的3000条选定荧光谱线指定了量子数。通过对D-X系统的LIF光谱线、C-X系统的一些谱线以及最近报道的微波光谱数据进行加权最小二乘法拟合，确定了X1Sigma态的一组新常数（邓纳姆型系数）和D1Pi态的项值。X1Sigma的常数（单位：cm-1）如下：ωe = 123.993，ωexe = 0.3045，Be = 0.095229，αe = 4.48×10^(-4)。平衡核间距为re = 3.49903 Å，与微波值相比变化很小。版权所有1998年学术出版社。