An investigation of the anomalous asymptotic behavior of elastic electron scattering of helium

doi:10.1063/1.5128947

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	An investigation of the anomalous asymptotic behavior of elastic electron scattering of helium
	Liu, YW ; Xiong, T ; Huang, XC ; Yang, K ; Yu, KL ; Hiraoka, N ; Tsuei, KD ; Zhu, LF
刊名	JOURNAL OF CHEMICAL PHYSICS
	2020
卷号	152 期号:3 页码:-
关键词	DIFFERENTIAL CROSS-SECTIONS GENERALIZED OSCILLATOR-STRENGTHS 2 S-1 EXCITATIONS P-1 RADIATION IMPACT ATOMS
ISSN号	0021-9606
DOI	10.1063/1.5128947
文献子类	期刊论文
英文摘要	For the inelastic electron scattering of atoms and molecules, a consensus has been reached that the first Born approximation is easily approached by decreasing the momentum transfer at the same impact electron energy or increasing the impact electron energy at the same momentum transfer. Although this consensus is applicable for the elastic electron scattering of most atoms and molecules, it is violated for helium where the experimental differential cross sections deviate from the first Born approximation prediction gradually with the decrease of squared momentum transfer at the same impact electron energy. Since this anomalous phenomenon was observed more than 40 years ago, the intrinsic mechanism is not explicit. In the present work, using the high-resolution x-ray scattering, we isolate the scattering contribution from the nucleus and directly obtain the pure electronic structure of helium. Then, the anomalous asymptotic behavior of the elastic electron scattering of helium has been elucidated, i.e., in the small squared momentum transfer region, the scattering contribution from the target's electrons is counteracted by the one from the atomic nucleus, which results in the residual contribution beyond the first Born approximation being drastically enlarged.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/32702]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China 2.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China 3.Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China 4.Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum, Hefei 230026, Anhui, Peoples R China 5.Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan
推荐引用方式 GB/T 7714	Liu, YW,Xiong, T,Huang, XC,et al. An investigation of the anomalous asymptotic behavior of elastic electron scattering of helium[J]. JOURNAL OF CHEMICAL PHYSICS,2020,152(3):-.
APA	Liu, YW.,Xiong, T.,Huang, XC.,Yang, K.,Yu, KL.,...&Zhu, LF.(2020).An investigation of the anomalous asymptotic behavior of elastic electron scattering of helium.JOURNAL OF CHEMICAL PHYSICS,152(3),-.
MLA	Liu, YW,et al."An investigation of the anomalous asymptotic behavior of elastic electron scattering of helium".JOURNAL OF CHEMICAL PHYSICS 152.3(2020):-.