NiI[14.6]~2 △_(5/2)-X^2 △_(5/2) (9,0)带的超精细结构(英文)  

Hyperfine Structure of the [14.6]~2 △_(5/2)-X^2 △_(5/2)(9,0) Band of NiI

作　　者：张仕中[1] 

机构地区：[1]香港大学化学系

出　　处：《Chinese Journal of Chemical Physics》2004年第3期279-282,共4页化学物理学报（英文）

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 ]2 △5/ 2 -X2 △5/ 2跃迁的 (9,0 )带进行了高分辨研究 .80MHz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 ]2 △5/ 2 态中超精细耦合适合Hundaβ 耦合情况 .[14 .6 ]2 △5/ 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 .The (9,0) band of the \ 2△ 5/2-X2△ 5/2 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 \ 2△ 5/2 state conforms to the Hund′s Case a β coupling scheme. Accurate rotational and hyperfine parameters for the \ 2△ 5/2 state have been obtained, which indicate that the v=9 level is perturbed.

关 键 词：激光诱导荧光光谱 激光蒸发/反应 Ni的超精细结构 

分 类 号：O641[理学—物理化学]