强耦合氢等离子体中Be~（3＋）的结构和辐射性质研究

采用离子球模型研究了强耦合氢等离子体中杂质Be3＋的原子结构和光谱性质随离子球大小的变化规律.结果表明,强耦合等离子体的屏蔽效应对其中的原子结构和光谱影响很大,而且不同模型给出的结果有很大的差别;在离子球模型下,类氢的轨道电离能随着屏蔽效应的增强而单调减小,轨道的简并度解除,但是随着屏蔽效应的增强,轨道将二次简并,轨道能级关于角动量发生发转;不同主量子数n两能级之间辐射的光谱随着屏蔽效应的增强先红移而后蓝移,在非相对论情况下,屏蔽效应引起同n轨道能级劈裂,辐射出新的光谱,该光谱随着等离子体效应的增强先蓝移后红移,经过再次简并后继续蓝移,直到不再辐射出光谱为止;轨道之间的重叠积分由于等离子体屏蔽效应先减小而后增大,从而振子强度随着等离子体屏蔽效应的增强先减小而后增大.目前的计算数据与可查的数据非常符合.

The Structure and Radiation Properties of Be3+ in the Strongly-coupled Hydrogenic Plasmas

The atomic structure and spectrum of impury Be3＋as functions of the magnitude of ion-sphere were presented adopting ion-sphere model in the strongly-coupled hydrogenic plasmas.The results demonstrated that the plasma screening effects couldn＇t be ignored on the atomic structure and spectrum,and the different plasma models give significantly different results.If the ion-sphere model is used to simulate the plasma screening effect,the ionization energy of hydrogen-like ions decreases continuously with an increase in plasma screening effect and l-degeneracy is lifted,but l-degeneracy occurs again and the angular momentum of the orbital energy will be inverse.The lines associated with theΔn≠0transitions are firstly red-shifted and subsequently blue-shifted whereas those ofΔn = 0transitions are firstly blue-shifted and catch up a local maximum,then red-shifted,and the two orbitals became degenerated again under a certain plasma condition,and then blue-shifted until the orbital merges into the continuum.The overlap integral between the orbitals decreases firstly and then increases due to the plasma shielding effect;therefore the oscillator strength also decreases firstly and then increases with the enhancement of the plasma shielding effect.The current calculated data is consistent with the data available for investigation.