N2O^＋离子A^2Σ^＋电子态高振动能级的转动结构分析  

Rovibronic spectrum of N_2O^+ ion at the A^2Σ^+ state

作　　者：汪华[1] 刘世林[1] 刘杰[2] 王凤燕[2] 姜波[2] 杨学明[2] 

机构地区：[1]中国科学技术大学化学物理系,合肥微尺度物质科学国家实验室,合肥230026 [2]中国科学院大连化学物理研究所,分子反应动力学国家重点实验室,大连116023

出　　处：《物理学报》2008年第2期796-802,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:20533070,20573100);高等学校博士学科点专项科研基金(批准号:20060358032)资助的课题.~~

摘　　要：利用一束波长为360·55nm的激光,通过(3+1)共振多光子电离方法制备纯净的且处于X2Π1/2,3/2(000)态的N2O+离子,用另一束激光激发所制备的离子到第一电子激发态A2Σ+的不同振动能级,然后解离,通过检测解离碎片NO+强度随光解光波长的变化,得到了转动分辨的N2O+碎片激发谱.通过对光谱转动结构的拟合,获得了N2O+离子A2Σ+电子态一系列高振动能级的转动常数和自旋分裂常数.The rotational structures of the photofragment excitation spectrum of N2O^＋ （A^2Σ^＋ ） at high vibrational levels have been studied experimentally. The parent N2O^＋ （X2Π） ions were prepared by （3 ＋ 1 ） resonance-enhanced multiphoton ionization of jet-cooled N2O molecules by 360.55 nm laser beam, and were excited by another laser to the predissociative A^2Σ^＋ state in the range of 280-320 nm. Two types of rotational transition, i.e., ^2Σ^＋←2 Π and 2Π←2Π, have been clearly observed for a series of vibronic transitions. The rotational constants and spin splitting constants have been obtained from the spectral analysis.

关 键 词：N2O^+离子A^2Σ^+电子态 共振增强多光子电离 光解碎片激发光谱 光谱常数 

分 类 号：O561[理学—原子与分子物理]