Doubly differential cross sections for ionisation in proton–helium collisions at intermediate energies: energy and angular distribution of emitted electrons
Doubly differential cross sections for ionisation in proton–helium collisions at intermediate energies: energy and angular distribution of emitted electrons
复制标题
中间能量质子-氦碰撞电离的双微分截面：发射电子的能量和角分布
DOI：
--
复制
发表时间：
2023
期刊：
影响因子：
--
通讯作者：
A. Kadyrov
中科院分区：
文献类型：
--
作者：
K. Spicer;C. Plowman;S. Alladustov;I. Abdurakhmanov;I. Bray;A. Kadyrov
利用双中心波包收敛紧耦合方法，我们继续研究了质子-氦碰撞系统。该方法使用一个相关的两电子波函数来描述氦目标和离散的连续使用波包赝态。在电子发射能量和发射角的横截面差分计算入射射弹能量在中间范围从70至300千电子伏，其中各种通道之间的耦合和电子-电子相关效应是重要的。我们还采用了一种替代的，更简单的方法，减少了一个有效的单电子系统的目标。总体而言，目前的结果，从两种方法同意与现有的实验数据。这两个实现的两个中心的波包收敛的紧密耦合的方法，以及进一步研究其他双微分，以及完全差分，单电离质子氦碰撞的横截面。
Using the two-centre wave-packet convergent close-coupling approach, we continue our study of the proton–helium collision system. This method uses a correlated two-electron wave function to describe the helium target and discretises the continuum using wave-packet pseudostates. The cross section differential in the electron-emission energy and emission angle is calculated for incident-projectile energies in the intermediate range from 70 to 300 keV, where coupling between various channels and electron–electron correlation effects are important. We also apply an alternative, simpler approach that reduces the target to an effective single-electron system. Overall, the present results from both methods agree well with the available experimental data. This positions both implementations of the two-centre wave-packet convergent close-coupling approach well to further study other doubly differential, as well as fully differential, cross sections of single ionisation in proton–helium collisions.