一氧化碳分立跃迁的光学振子强度和微分散射截面研究  

A STUDY OF OPTICAL OSCILLATOR STRENGTHS AND DIFFERENTIAL CROSS SECTIONS IN THE DISCRETE REGION OF CARBON MONOXIDE

作　　者：钟志萍[1] 武淑兰[1] 徐征 朱林繁[1] 张晓军[1] 凤任飞[1] 徐克尊[1] 

机构地区：[1]中国科学技术大学近代物理系

出　　处：《物理学报》1998年第3期419-427,共9页Acta Physica Sinica

基　　金：国家自然科学基金;国家高等学校博士学科点专项科研基金;中国科学技术大学青年基金

摘　　要：在电子入射能量１５００ｅＶ、平均散射角为０°和能量分辨为６０ｍｅＶ条件下，得到了一氧化碳在７—２１ｅＶ能量区间的绝对光学振子强度密度谱，获得了电子态Ａ１Π，Ｂ１Σ＋，Ｃ１Σ＋及Ｅ１Π的各振动能级的绝对光学振子强度，通过与已发表的各实验和理论数据作比较，分析了差异的原因，并讨论了偶极（ｅ，ｅ）方法确定光学振子强度的局限性．同时还给出在电子入射能量１５００ｅＶ时上述四个电子态的各振动能级的绝对微分散射截面．Abstract The absolute optical oscillator strength density spectrum of carbon monoxide has been measured at an impact energy of 1.5keV and a mean scattering angle of 0° in an energy region of 7—21eV with typical FWHM 60meV. The absolute optical oscillator strengths corresponding to vibrational levels of A 1Π, B 1Σ +, C 1Σ + and E 1Π are determined and compared with previous experimental and theoretical results. The reason why discrepancies exist among experimental results obtained by various methods has been explained and the limitation of dipole (e,e) method in determining optical oscillator strengths has been discussed.

关 键 词：分子 一氧化碳 分立跃迁 光学振子强度 散射截面 

分 类 号：O561.5[理学—原子与分子物理]