BN分子A^3П—X^3П带系振子强度的理论计算

选用ＳＴＯ－４Ｇ双ζ扩展基组，采用单组态自洽场方法计算了分子轨道，然后再作较大规模的组态相互作用计算，得到ＢＮ分子基电子态和第一激发电子态的能量及波函数。两电子态的能量差与实验值相符甚好。在偶极近似下，计算了ＢＮ分子Ａ＾３П－Ｘ＾３П带系的振子强度，其值为０．０５６４。     

Calculation for Franck-Condon Factors of the Angstrom Band System B~1∑~ →A~1Π and the Herzberg Band System C~1∑~ →A~1Π of CO Molecule

在双原子分子核运动的波动方程中，计入分子的振转相互作用项，在Ｍｏｒｓｅ势近似下得出的波函数除了与振动量子数有关外，还与转动量子数有关．用该波函数编程计算了高温空气中ＣＯ分子Ａｎｇｓｔｒｏｍ带系Ｂ１∑＋→Ａ１Π和Ｈｅｒｚｂｅｒｇ带系Ｃ１∑＋→Ａ１Π的ＦｒａｎｃｋＣｏｎｄｏｎ因子．计算中转动量子数的取值由Ｊ＝０至Ｊ＝２００，结果适用于低温、高温和强激波条件．     

Theoretical Calculation Model of Single Rip Tearing Strength for the Nonwoven Composites

The nonwoven composites have sandwich structure, with the first and third layers being nonwovens and the middle layer of woven fabric. On the basis of tests of the single rip tearing strength and drawing out resistances of both the nonwoven composites and the woven fabric, the single rip tearing failure mechanism of the composites were analyzed. Then theoretical calculation model for the single rip tearing strength was established, which indicates that the breaking strength of warp and weft yams in the nonwoven composites, the density of warp and weft yarns and drawing out resistances are the main influencing factors. In the end, experimental verification was made, which shows that theoretical values conform to the measured values well.     

B_2分子A~3Σ_u~-X~3Σ_g~-带系振子强度的理论计算

选用STO-4G双ζ的扩展基组,用MCSCF方法结合CI计算,得到B_2分子基电子态(X~3∑_g~-)和第一激发电子态(A~3∑_u~-)的波函数。在偶极近似下,计算了该分子A~3∑_u~-—X~3∑_g~-带系的振子强度,其值为0.00124。