Measurement of the Charge Exchange Cross Section for N7+, O7+ Ions in Collision with Atomic H
Measurement of the Charge Exchange Cross Section for N7+, O7+ Ions in Collision with Atomic H
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DOI：
10.3847/1538-4357/ac6876
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发表时间：
2022-05
期刊：
影响因子：
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通讯作者：
R. Zhang;D. Seely;V. Andrianarijaona;I. Draganic;C. Havener
中科院分区：
文献类型：
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作者：
R. Zhang;D. Seely;V. Andrianarijaona;I. Draganic;C. Havener
用橡树岭国家实验室的离子-原子合束装置测量了高电荷态离子15N7+、O7+和H原子之间电荷交换的绝对总截面。碰撞能量范围从1224到2 eV u−1，这涵盖了天体物理电荷交换等离子体的外流热成分，如恒星风和超新星残留物。在碰撞能高于100 eV u−1时，碰撞能与前人的测量和理论符合得很好，而在100 eV u−1以下，碰撞能与已有的计算得到了有限的一致。这些截面数据对于模拟热等离子体与环境中性气体相互作用界面电荷交换产生的X射线辐射是有用的。
The absolute total cross sections for the charge exchange between highly charged ions 15N7+, O7+, and atomic H have been measured with the ion-atom merged-beams apparatus at Oak Ridge National Laboratory. The collision energy range is from 1224 down to 2 eV u−1, which covers outflowing hot components of astrophysical charge exchange plasmas like stellar-wind and supernova remnants. Good agreement with the previous measurements and theory is found for the collision energies above 100 eV u−1, while below 100 eV u−1 limited agreement is achieved with the available calculations. These cross-section data are useful for modeling X-ray emission resulting from the charge exchange at the interface of hot plasma interacting with ambient neutral gas.