Benchmark n ℓ-resolved Cross Sections of Single and Double Charge Exchange Processes in 1.67–20 keV u−1 C4+ Collisions with He
Benchmark n ℓ-resolved Cross Sections of Single and Double Charge Exchange Processes in 1.67–20 keV u−1 C4+ Collisions with He
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1.67–20 keV u–1 C4 与 He 碰撞中单电荷和双电荷交换过程的基准 n 解析横截面
DOI：
10.3847/1538-4357/ac9d2e
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发表时间：
2022-12
期刊：
影响因子：
--
通讯作者：
X. Ma
中科院分区：
文献类型：
--
作者：
D. L. Guo;R. T. Zhang;X. L. Zhu;Y. Gao;K. Z. Lin;T. Cao;D. M. Zhao;X. B. Zhu;C. J. Zhang;S. F. Zhang;X. Ma
抽象的。状态分辨电荷交换（CX）截面对于建模广泛天体物理环境中存在的相关光子发射至关重要。利用冷靶反冲离子动量谱，我们高精度地确定了太阳风离子C4+与He在1.67-20 keV u−1能量范围内碰撞的量子轨道角动量水平下的状态分辨单和双CX截面，这使得人们可以对CX计算进行详细的基准测试，并测试天体物理学界广泛采用的n-和n-分布分析模型的适用性。我们发现，目前的测量是很好地再现了最新的国家的最先进的原子轨道密耦合计算。然而，CX模型未能给出一个一致的描述所测量的分布。目前的工作表明，速度和碰撞伙伴的物种依赖性的影响，以及多电子过程的电子关联，应包括在一个改进的模型。或者，在未来解释高分辨率天体物理观测的建模中，更精细的量子力学计算可能会有信心。
Abstract. State-resolved charge exchange (CX) cross sections are of the utmost importance for modeling related photon emissions existing in a broad range of astrophysical environments. With the cold-target recoil-ion momentum spectroscopy, we determined with high accuracy the state-resolved single and double CX cross sections at the quantum orbital angular momentum level for solar wind ion C4+ collisions with He in an energy range of 1.67–20 keV u−1, which allow one to benchmark the CX calculations in great detail, and to test the applicability of the analytical n- and ℓ-distribution models widely adopted by the astrophysical community. We found that the present measurements are well reproduced by the most recent state-of-the-art atomic–orbital close-coupling calculations. However, the CX models failed to give a consistent description on the measured ℓ distributions. The present work reveals that the velocity and collision partner species dependence effects as well as electronic correlations for multielectron processes should be included in an improved model. Alternatively, in future modeling to interpret high-resolution astrophysical observations the more elaborate quantum-mechanical calculations may be resorted to with confidence.
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DOI：
10.1016/0370-1573(85)90118-8
发表时间：
1985
期刊：
Physics Reports
影响因子：
--
作者：
R. Janev;H. Winter
通讯作者：
R. Janev;H. Winter
DOI：
10.1088/0022-3700/17/21/005
发表时间：
1984-11
期刊：
Journal of Physics B
影响因子：
--
作者：
M. Kimura;R. Olson
通讯作者：
M. Kimura;R. Olson
彗星的 X 射线和极紫外线发射
影响因子：
10.3
作者：
V. Krasnopolsky;J. Greenwood;P. Stancil
通讯作者：
P. Stancil
影响因子：
4.9
作者：
Cumbee, R. S.;Mullen, P. D.;Stancil, P. C.
通讯作者：
Stancil, P. C.
影响因子：
6.5
作者：
Branduardi-Raymont, G.;Bhardwaj, A.;Cravens, T. E.
通讯作者：
Cravens, T. E.