用双光子吸收研究Na_26~1∑_g^+态的预离解  

A Study of the Predissociation of Na_2 Molecules in the 6~1Σ_g^+ State by Two-photon Absorption

作　　者：沈异凡[1] 罗兰[1] 

机构地区：[1]新疆大学物理系,乌鲁木齐830046

出　　处：《科学技术与工程》2002年第3期7-8,共2页Science Technology and Engineering

基　　金：国家自然科学基金(19864001)

摘　　要：研究了 Na_26′∑_g^+态的预离解,Na 蒸汽被 Ar^+激光器泵浦的染料激光激发,通过双光子吸收使6°∑_g^+态得到布居,记录吸收线的宽度,分别测量 Na 3D→3P,5S→3P,4D→3P 跃迁的谱线强度与分子谱线的强度比,得到了6′∑_g^+态的预离解率。Predissociation of a high-lying 6~1∑_g^+ state of Na_2 is studied.Na vapor is irradiated from a Ar^+ laser pumped dye laser, populating 6~1∑_g^+ state by two-photun absorption.The predissociation is monitored by the atomic sodium emission on the Na 3D→3P,5S→ 3P and 4D→3P transitions.By combining ratios of atomic to molecular fluorescence,the absolute predissociation rate of 6~1∑_g^+ level is directly measured from the line width recorded on the laser excitation scan.

关 键 词：高位态 双光子 预离解 磁撞能量转移 碱双原子分子 双光子 吸收线 

分 类 号：O562.4[理学—原子与分子物理]