A theoretical study on resonance phenomena in electron capture by highly-charged ions from electronic-excited targets

1.它被认为是在电子捕获过程中产生的共振现象，因为在较高的碰撞能量中捕获，即预测的电荷和目标的双极极化性成为较大的。The cross sections of electron capture by highly-charged ions of Be， B， C， N， and O atoms from H，Hy D22，y D2， and He targets were calculated。Resonances appeared at E ― 0. 01 and ― 0. 015 eV/amu in the （BeイイD13+イエD1 + H） and （NイイD15+イエD1 + H），respectively. 2。电子兴奋的原子具有较大的双极极化性，因此我们为电子兴奋的目标中的电子捕获过程计算了交叉部分。该结果显示，电子刺激目标不适用于对共振的测量，因为它们和其他潜在能量曲线之间的潜在转换以及由于在许多潜在交叉点之间的不可期望转换。Alkali metal atoms have large dipole polarizability， so we calculated the cross sections for electron capture processes by Bey D1q + Ey D1q + Ey D1ions（q = 2， 3） from alkali metal targets。In the （BeイD12+イエD1 + Li） system， resonance occurred at E ≤ 0.06 eV。因此，由于系统的（他、Be、B、C、N、O + alkali金属原子的高度充电），交叉部分的计算继续进行。In the case of （HeイイD12+イエD1 + Na） system， resonance appeared at E ― 0. 3 eV. 4。在订购时，以澄清共振现象的机制，并根据已开发的波包中的一些代码。quantum-mechanical multi-channel time-dependent close-coupling method was applied to （NイイD15+イエD1 + H） collision system。quasi-bound molecule， which stays at rovibrational state with long lifetime （0.5 psec - 20 psec）， could be confirmed。

1. It is anticipated that resonance phenomena in electron-capture processes occur at higher collision energies as the charge of projectile ions and the dipole polarizability of targets become large. The cross sections of electron capture by highly-charged ions of Be, B, C, N, and O atoms from H, HィイD22ィエD2, and He targets were calculated. Resonances appeared at E ≦ 0.01 and ≦ 0.015 eV/amu in the (BeィイD13+ィエD1 + H) and (NィイD15+ィエD1 + H) systems, respectively.2. Electronic-excited atoms have large dipole polarizability, so we calculated cross sections for electron capture processes from the electronic-excited targets. The results showed that the electronic-excited targets were not appropriate for the measurement of resonance because of the repulsion between its and other potential energy curves and because of undesirable transitions at many potential crossing points.3. Alkali metal atoms have large dipole polarizability, so we calculated the cross sections for electron capture processes by BeィイD1q+ィエD1 and BィイD1q+ィエD1 ions (q = 2, 3) from alkali metal targets. In the (BeィイD12+ィエD1 + Li) system, resonance occurred at E ≦ 0.06 eV. So, for the systems of (highly-charged ions of He, Be, B, C, N, O + alkali metal atoms), the calculations of the cross section were continued. In the case of (HeィイD12+ィエD1 + Na) system, resonance appeared at E ≦ 0.3 eV.4. In order to make clear the mechanism of resonance phenomena, some codes based on wave-packet were developed. The quantum-mechanical multi-channel time-dependent close-coupling method was applied to (NィイD15+ィエD1 + H) collision system. The formation of quasi-bound molecule, which stays at rovibrational state with long lifetime (0.5 psec - 20 psec), could be confirmed.