^(20)Ne(^(34)Ne)原子与^(18)Na_2(^(23)Na_2,^(37)Na_2)分子低温下冷碰撞的同位素效应研究  

Study of isotope effect in ^(20)Ne(^(34)Ne)-^(18)Na_2(^(23)Na_2,^(37)Na_2) low-temperature collisions

作　　者：臧华平[1] 李文峰[1] 令狐荣锋[1,2] 程新路[1] 杨向东[1] 

机构地区：[1]四川大学原子与分子物理研究所,成都610065 [2]贵州师范大学物理与电子科学学院,贵阳550001

出　　处：《物理学报》2011年第5期47-54,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10974139,10964002);高等学校博士学科点专项科研基金(批准号:20050610010);贵州省科学技术基金(批准号:[2009]2066);贵州省高层次人才科研条件特助项目(批准号:TZJF-2008年42号)~~

摘　　要：本文用多体刚性椭球模型计算了相对入射能量为190meV时,氖的同位素原子20Ne,34Ne与钠的同位素分子18Na2,23Na2,37Na2替代碰撞体系的态态转动激发积分散射截面和总转动激发积分散射截面,在此基础上计算并分析了相互作用势的不同区域对20Ne-18Na2,23Na2,37Na2各碰撞体系转动激发积分散射截面的贡献情况.通过分析各碰撞体系转动激发积分散射截面的差异,总结出在钠分子的对称同位素替代情形下20Ne,34Ne-18Na2,23Na2,37Na2碰撞体系转动激发积分散射截面随转动量子数和体系约化质量变化的规律.Multiple ellipsoid model is applied to the20 Ne,34 Ne-18 Na2,23 Na2 and37 Na2 collision systems.The integral cross-sections for rotational excitation and total collision cross-sections at the incident energy of 190 meV are calculated.Moreover,at the related incident energy,the contributions of different regions of the potential to the integral cross-sections of rotational excitation for20 Ne-18 Na2,23 Na2 and37 Na2 collision systems are investigated.By analyzing the differences of these integral cross-sections,the change rules of the integral cross sections with the change of rotational angular quantum number of Na2 molecule,as well as with the change of the reduced mass of symmetric isotopic substituted system are obtained.

关 键 词：多体刚性椭球模型 转动激发积分散射截面 钠同位素分子 椭球等势面 

分 类 号：O562.5[理学—原子与分子物理]