约化质量 meaning in English

reduced mass

By analyzing the differentiae of the total cross sections ( tcs ) , the differential cross sections ( dcs ) , the partial wave cross sections ( pcs ) , the change patterns of the cross sections and the influence on the cross sections because of the var iations in the mass of systems and the relative kinetic energy of incoming atoms for symmetric isotopically substituted systems he , ne , ar , kr , xe - h2 , d2 , t2 have been obtained . in this paper , we use the tang - toennies potential model for the inertia gas atoms - h2 systems , the murrell - sorbie potential surface with five parameters for the molecules h2 , d2 , t2 . for the inertia gas atoms - d2 , t2 systems , we use the same potential surface with the inertia gas atoms - h2 systems
通过分析he 、 ne 、 ar 、 kr 、 xe ? h _ 2 、 d _ 2 、 t _ 2各碰撞体系在总截面、微分截面和分波截面等方面的差异，总结出在h _ 2分子的对称同位素替代情形下惰性气体原子与h _ 2分子体系碰撞截面的变化规律；通过比较he 、 ne 、 ar 、 kr 、 xe ? h _ 2 、 d _ 2 、 t _ 2各体系在碰撞总截面、微分截面、分波截面等方面的不同，详细讨论了同位素替代碰撞体系中体系约化质量及入射原子的相对碰撞能量的变化对碰撞截面的影响，得出了这种影响的规律性。