Negative ions produced in multicharged ions and C-60 collisions

doi:10.1088/0031-8949/2011/T144/014022

	Negative ions produced in multicharged ions and C-60 collisions
	Martin, S.1,2,3; Salmoun, A.5; Bredy, R.1,2,3; Montagne, G.1,2,3; Bernard, J.1,2,3; Ma, X.4; Chen, L.1,2,3
	2011-06
卷号	T144
DOI	10.1088/0031-8949/2011/T144/014022
英文摘要	We have measured the differential cross-sections in F3+-C-60 collisions at low velocity (v = 0.18 a.u.). Using coincidence measurements between the ejected electron number and recoil ions, we have estimated the initial charge state of C-60 parent ions associated with neutral outgoing projectiles to range from 4+ to 7+. We found that the formation of anions is correlated with the strong excitation of C-60 (average excitation energy about 160 eV). The cross-section of the production of the anion has been found to be 25 a.u. This value is in agreement with the scenario of anion formation in two steps. In the first step, F3+ ions are neutralized by multicollision on the C-60 surface. In the second step and at the exit part of the collision, the electron attachment process occurs. For the production of a stable anion, the capture of electrons on carbon must occur directly to the ground states of F-, giving many electron vacancies on C-60. This process explains the observation of strong electronic and vibronic excitations of C-60 leading to electron emission and multifragmentation processes.
会议录	PHYSICA SCRIPTA
会议录出版者	IOP PUBLISHING LTD
会议录出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
语种	英语
WOS研究方向	Physics
WOS记录号	WOS:000291795900023
内容类型	会议论文
源URL	[http://119.78.100.186/handle/113462/57383]
专题	中国科学院近代物理研究所
通讯作者	Martin, S.
作者单位	1.Univ Lyon, F-69622 Lyon, France 2.Univ Lyon 1, F-69622 Villeurbanne, France 3.CNRS, LASIM, UMR5579, F-75700 Paris, France 4.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 5.Univ Chouaib Doukkali, Dept Phys, Fac Sci, Lab Instrumentat Measure & Control, El Jadida, Morocco
推荐引用方式 GB/T 7714	Martin, S.,Salmoun, A.,Bredy, R.,et al. Negative ions produced in multicharged ions and C-60 collisions[C]. 见:.