Zeeman Effect in the Electronic Spectrum of Solid CS2
Zeeman Effect in the Electronic Spectrum of Solid CS2
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固体 CS2 电子能谱中的塞曼效应
DOI：
10.1063/1.1674653
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发表时间：
1971
影响因子：
4.4
通讯作者：
D. Wiersma
中科院分区：
文献类型：
--
作者：
R. Hochstrasser;D. Wiersma
在4.2°K下研究了CS2晶体中最低能量的3A 2 <$1 μ g+单重态-三重态跃迁。谱主要由弯曲模ν2′中的级数组成。得到了以下的高态频率值（ν1′ = 677 cm−1，ν2′=309 cm−1），而未观测到的B2电子原点被计算为24 739 cm−1。对3676-A能带系统的塞曼研究已用于将该系统振动带的非常弱的分量指定为三重态3A 2的（A1，B1）对自旋子能级的晶场诱导跃迁。这样得到的电子振动态的零场分裂（zero field splitting，简称ZF）参数为36 ± 1 cm-1，与Hougen [J. Chem. Phys. 41，363，（1964）]根据道格拉斯和米尔顿[J. Chem. Phys. 41，357（1964）]在气相中进行的塞曼谱线加宽实验计算出的值相当。如果假定3A 2和3B 2态是相当接近的，则可以解释这个大的参数值。
The lowest‐energy 3A2 ← 1Σg+ singlet‐triplet transition of CS2 has been studied in the CS2 crystal at 4.2°K. The spectrum consists mainly of progressions in the bending mode ν2′. The following values for the upper state frequencies have been obtained (ν1′ = 677 cm−1, ν2′=309 cm−1) and the unobserved B2 electronic origin has been calculated to be at 24 739 cm−1. Zeeman studies of the 3676‐A band system have been used to assign a very weak component of a vibronic band of this system as a crystal field induced transition to the (A1, B1) pair of spin sublevels of the triplet state 3A2. The zero field splitting (ZFS) parameter of 36 ± 1 cm−1 thus obtained for the vibronic state is comparable with the one calculated by Hougen [J. Chem. Phys. 41, 363, (1964)] from Zeeman line broadening experiments in the gas phase done by Douglas and Milton [J. Chem. Phys. 41, 357 (1964)] on comparable vibronic bands. The large value of the ZFS parameter can be explained if it is assumed that the 3A2 and 3B2 states are quite ne...