Our results show that , during the evolution of a binary system , the system widens as it loses mass , and the orbital period increase , while orbital eccentricity remains nearly constant , which can explain the distribution regulation of orbital elements of normal g - k giant and barium stars and the distribution character of the heavy - element abundances of barium stars 计算结果表明，随着星风吸积过程的进行，在星风质量损失阶段系统轨道半长轴将增大，导致轨道周期增大，而偏心率变化不大，由此可以解释普通红巨星双星系统和钡星系统的轨道根数的分布规律和变化情况以及钡星重元素丰度分布特征。
( 2000 ) . the neutron irradiation is assumed to derive primarily by the reaction 13c ( a , n ) i60 with a minor contribution from the marginal burning of 22ne through the channel 22ne ( a n ) 23mg in the final , high temprature phase of each flash . and we considered the influence of the various parameters such as the initial core mass , the envelope mass , the mass - loss rate , the overlap factor and the delution factor etc . , and we vary their value with the pulse number 本文采用分叉s -过程反应通道，以~ ( 13 ) c ( , n ) ~ ( 16 ) o 、 ~ ( 22 ) ne ( , n ) ~ ( 25 ) mg为双脉冲中子源，用最新的中子俘获截面，利用gallino和busso等人给出的agb星三壳层核合成模型，考虑到核心质量、挖掘程度、重叠因子、稀释因子及星风质量损失率随脉冲数的变化，详细计算和研究了各个金属丰度情况下的3m 。
