摘要
本文利用量子力学的 Infinite Order Sudden Approximation 近似方法和 Ar H Cl H6(2) 相互作用解析势模型,计算了 H Cl 分子转动跃迁谱线被 Ar 展宽的压力加宽截面( 相对能量范围30 cm - 1 —1000 cm - 1) 和平均弛豫截面( 系统温度125 K,175 K,300 K) .通过与密耦合方法( C C) 计算值及实验值的比较,发现 I O S A 近似方法对转动能级较为稀疏的分子的j = 0 ←j =1 转动跃迁谱线仍然可给出较好的计算结果,但要用于转动激发态跃迁谱线的计算却必须作改进.
The pressure\|broadened cross section (kinetic energy of the collision range:30?cm -1 —1000?cm -1 ) and the avarage relaxation cross section (temperature of the interaction system:125?K,175?K,300?K) for pure rotational dipole transition of HCl in Ar are calculated,by employing infinite order sudden approximation (IOSA) and Ar\|HCl H6(2) analytical potential energy surface of Hutson.Comparing the IOSA results with Close\|Coupling results and experiments,we find that IOSA can give satisfactory results for j=0←j=1 transition line of the molecules which have large rotational constant.Unfortunately,modfication must be performed for using IOSA in the exitation of transition lines. PACC: 3370J; 3420G
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第10期1852-1857,共6页
Acta Physica Sinica