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Hyperfine Structure of the[14. 6]2Δ5/2-X 2Δ5/2(9,0)Band of NiI
A. S. C. Cheung
Author NameAffiliationE-mail
A. S. C. Cheung Department of ChemistryThe University of Hong KongHong Kong hrsccsc@hku.hk 
Abstract:
The(9,0)band of the[14. 6]2Δ5/2 - X2Δ5/2 transition of NiI in the visible region has been studied at high resolution using laser vaporization / reaction supersonic free jet expansion and laser induced fluorescence spectroscopy. Spectrum taken at a resolution of about 80 MHz shows the resolved hyperfine structure which is caused by an unpaired electron in the excited state interacting with the large magnetic moment of the I nucleus with nuclear spin I = 5/2. The rapid decrease in hyperfine width of the low J lines in the v=9 level suggests that the hyperfine coupling in the[14. 6]2Δ5/2 state conforms to the Hund's Case aβ coupling scheme. Accurate rotational and hyperfine parameters for the[14. 6]2Δ5/2 state have been obtained,which indicate that the v=9 level is perturbed.
Key words:  Laser induced fluorescence spectroscopy,Laser vaporization / reaction,Hyperfine structure of NiI
FundProject:
NiI[14. 6]2Δ5/2-X 2Δ5/2(9,0)带的超精细结构
张仕中
摘要:
在可见光范围内,用激光蒸发/ 反应、超声射流和激光诱导荧光光谱方法,对NiI [14. 6]2Δ5/2-X2Δ5/2跃迁的(9,0)带进行了高分辨研究. 80 MHz分辨的光谱显示超精细结构是由于激发态中未成对电子与碘(I = 5/2)核大磁矩相互作用引起的. 在v=9能级上低J谱线的超精细线宽快速下降,表明在[14. 6]2Δ5/2态中超精细耦合适合Hund aβ耦合情况.[14. 6]2Δ5/2态的精确转动参数和超精细参数已得到,而且显示v=9能级被微扰了.
关键词:  激光诱导荧光光谱  激光蒸发/反应  Ni的超精细结构
DOI:10.1088/1674-0068/17/3/279-282
分类号: