20 Ne(34 Ne)原子与18 Na2(23 Na2,37 Na2)分子低温下冷碰撞的同位素效应研究

本文用多体刚性椭球模型计算了相对入射能量为190 meV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-¹⁸Na_{2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}

Study of isotope effect in 20 Ne(34 Ne) -18 Na2 (23 Na2 ,37 Na2 ) Iow-temperature collisions

Multiple ellipsoid model is applied to the²⁰Ne,³⁴Ne-¹⁸Na₂,²³Na₂ and³⁷Na₂collision 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 for²⁰Ne-¹⁸Na₂,²³Na₂ and³⁷Na₂ 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.