闭通道对氦氢碰撞激发分波截面影响的研究

Effect of close channels on the partial wave cross sections of excitation for the collisions of He with H_2

采用精确度较高的密耦近似方法计算了不同能量下的氯原子与氢分子碰撞体系的振转激发分波截面.在计算时依次考虑了入射通道中耦合态的数目为开通道数加上1个闭通道数,2个闭通道数,3个闭通道数,直到7个闭通道数的情况.结果表明:在研究氦氢碰撞体系的弹性碰撞、纯转动激发时,可以只考虑1个闭通道的影响,但在研究振转激发分波截面时,至少要考虑5个闭通道,才能得到比较准确的计算结果.

The close-coupling method is applied to the collisions of He with H2 systems at different incident energies. The partial wave cross sections of vibrational and rotational excitation are calculated from one close channel to seven close channels. It is established that one close channel will be thought in the partial wave cross sections of elastic collision and rotational excitation. Five close channels must be considered in the partial wave cross sections of vibrational and rotational excitation at least.