Fragmentation of CO22+ in collisions with low-energy electrons

doi:10.1103/PhysRevA.90.062705

	Fragmentation of CO22+ in collisions with low-energy electrons
	Wang, X.1,2; Zhang, Y.1,2; Lu, D.1,2; Lu, G. C.1,2; Wei, B.1,2; Zhang, B. H.3; Tang, Y. J.3; Hutton, R.1,2; Zou, Y.1,2
刊名	PHYSICAL REVIEW A
	2014-12-03
卷号	90
ISSN号	1050-2947
DOI	10.1103/PhysRevA.90.062705
文献子类	Article
英文摘要	The fragmentation of the CO22+ dication following 200 eV electron impact double ionization was studied using a cold target recoil-ion momentum spectroscopy. Both two-body and three-body fragmentation channels were observed with an ion-ion coincidence technique. The slopes of the peaks in the coincidence spectra were extracted and compared with previous results and theoretical predictions. Overall, good agreement between theoretical and experimental results was achieved, while different behaviors were observed for the channel of fragmentation into C+ + O+ + O with previous high energy electron impact results. The momentum vectors of ionic fragments were measured, and thus the momentum vector of the neutral particle was deduced and kinetic energy release (KER) distributions for the different fragmentation channels were obtained. KER distribution behavior also shows a different signature from that induced by high energy electron impact. Furthermore, the three-body fragmentation mechanism, i.e., dissociation in one-or two-step processes, was distinguished from their distinct signatures on the Dalitz plots and the slopes of the islands from the covariance mapping spectrum. For example, the fragmentation channel C+ + O+ + O was found to be very similar to the 60 eV photon impact result [J. Laksman, E. P. Mansson, C. Grunewald, A. Sankari, M. Gisselbrecht, D. Ceolin, and S. L. Sorensen, J. Chem. Phys. 136, 104303 (2012)], which shows a predominant sequential dissociation process.
WOS关键词	INTENSE LASER FIELDS ; DISSOCIATIVE IONIZATION ; IMPACT ; DEFORMATION ; DYNAMICS ; STATES
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000349258300009
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/49215]
专题	中国科学院近代物理研究所
通讯作者	Wei, B.
作者单位	1.Fudan Univ, Key Lab, Appl Ion Beam Phys Lab, Minist Educ, Shanghai 200433, Peoples R China 2.Fudan Univ, Inst Modern Phys, Dept Nucl Sci & Technol, Shanghai 200433, Peoples R China 3.China Acad Engn Phys, Res Ctr Laser Fus, Mianyang 621900, Peoples R China
推荐引用方式 GB/T 7714	Wang, X.,Zhang, Y.,Lu, D.,et al. Fragmentation of CO22+ in collisions with low-energy electrons[J]. PHYSICAL REVIEW A,2014,90.
APA	Wang, X..,Zhang, Y..,Lu, D..,Lu, G. C..,Wei, B..,...&Zou, Y..(2014).Fragmentation of CO22+ in collisions with low-energy electrons.PHYSICAL REVIEW A,90.
MLA	Wang, X.,et al."Fragmentation of CO22+ in collisions with low-energy electrons".PHYSICAL REVIEW A 90(2014).