共查询到20条相似文献,搜索用时 421 毫秒
1.
《原子与分子物理学报》1996,(3)
TOTALCROSSSECTIONMEASUREMENTSFORELECTRONSCATTERINGONMETHANEBETWEEN1AND50eVLiTaihuaYeRuiyingYangYongCenterforRadiationPhysics... 相似文献
2.
EFFECTOFRADIALELECTRICALFIELDONNEOCLASSICALTRANSPORTINTOKAMAKSEFFECTOFRADIALELECTRICALFIELDONNEOCLASSICALTRANSPORTINTOKAMAKS¥... 相似文献
3.
THEMACQMCALCULATIONOFTHETOTALENERGYCURVEFORTHEICOSAHEDRALCENTRALSTRUCTUREOFTHECLUSTERH-13ZhangJianping*LiPingGouQingquanInst... 相似文献
4.
Chen Xiangrong Gou Qingquan Pang Xiaofeng Institute of Atomic Molecular Science at High Temperature High Pressure Sichuan Union University Chengdu China 《原子与分子物理学报》1997,(3)
CALCULATIONFORSTRETCHINGVIBRATIONALSPECTRUMOFCH4ChenXiangrongGouQingquanPangXiaofengInstituteofAtomicandMolecularScienceatHig... 相似文献
5.
Chen Zhangjin a b Xu Kezun b Xu Fuxin aa Department of Physics Anhui Unviersity Hefei b Department of Modern Physics University of Science Technology of China Hefei 《原子与分子物理学报》1998,(3)
LOWENERGYTRIPLEDIFFERENTIALCROSSSECTIONSFORELECTRONIMPACTIONIZATIONOFHYDROGENChenZhangjina,bXuKezunbXuFuxinaaDepartmentofPhy... 相似文献
6.
THEORETICALCALCULATIONOFATOMICANDMOLECULARDATAPeiChunchuanPurpleMountainObservatoryAcademiaSinicaNanjing210008ABSTRACTByusin... 相似文献
7.
Chen Zhangjin Shi Qicun Chen Ji Xu Kezun Department of Modern Physics University of Science Technology of China Hefei 《原子与分子物理学报》1997,(1)
ELECTRONMOMENTUMSPECTRAOFEXCITEDHe(21S)ANDHe(23S)ChenZhangjinShiQicunChenJiXuKezunDepartmentofModernPhysics,UniversityofScien... 相似文献
8.
DIELECTRONICRECOMBINATIONRATECOEFFICIENTSFORNEONLIKEIONSDIELECTRONICRECOMBINATIONRATECOEFFICIENTSFORNEONLIKEIONS¥ZhaoLibo;LiS... 相似文献
9.
STRUCTURESANDINTERNALMOTIONOFANe3CLUSTERXieWenfangChenChuanyuDepartmentofPhysics,GuangzhouTeachers′colegeGuangzhou510400ABST... 相似文献
10.
《原子与分子物理学报》1996,(3)
THEREFLECTIVITYCALIBRATIONANDAPPLICATIONOFXRAYGRAZINGMIRRORMaHongliangSunKexuYiRongqingCuiYanliZhengZhijianTangDaoyuanSouthw... 相似文献
11.
J. Mahoney V. Tarnovsky K. H. Becker 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2008,46(2):289-293
We measured absolute partial cross sections for the formation of all singly
charged positive ions produced by electron impact on SiCl2 and SiCl
from threshold to 200 eV using the fast-neutral-beam technique. Some of the
cross section curves exhibit an unusual energy dependence with a pronounced
low-energy maximum at an energy around 30 eV, which may be indicative of the
presence of indirect ionization channels. Dissociative ionization channels
are dominant for both species. The experimentally determined total single
ionization cross sections for both species agree very well with calculated
cross sections using the Deutsch-M?rk (DM) formalism. A brief summary of
the ionization cross sections determined for all four SiClx (x=1–4)
species is given highlighting similarities and differences. 相似文献
12.
Although positron scattering with inert gas atoms has been studied in theory as well as in experiment, there are discrepancies. The present work reports all the major total cross sections of e+-neon scattering at incident energies above ionization threshold, originating from a complex potential formalism. Elastic and cumulative inelastic scatterings are treated in the complex spherical e+-atom potential. Our total inelastic cross section includes positronium formation together with ionization and excitation channels in Ne. Because of the Ps formation channel it is difficult to separate out ionization cross sections from the total inelastic cross sections. An approximate method similar to electron-atom scattering has been applied to bifurcate ionization and cumulative excitation cross sections at energies from threshold to 2000 eV. Comparisons of present results with available data are made. An important outcome of this work is the relative contribution of different scattering processes, which we have shown by a bar-chart at the ionization peak. 相似文献
13.
Configuration-average distorted-wave calculations are carried out for electron-impact ionization of Ar5+. Both direct ionization and the indirect excitation autoionization processes are included in our calculations. Our theoretical values are in quite reasonable agreement with the experimental data. The indirect processes contribute up to 50% to the total ionization cross sections. The possible origin of double-hump resonance structure of the cross sections is demonstrated and the contributions of metastable states are also taken into account. 相似文献
14.
Using the effective-range theory in the complex-quasienergy method for describing a weakly bound electron in a laser field, it has been shown that the cross sections for above-threshold ionization and generation of the high harmonics of laser radiation increase significantly (resonant-like) near the threshold of one of the multiphoton ionization channels. The dependence of the enhancement effects on the orbital angular momentum of the bound electron shows that these effects are caused by the threshold phenomena in the cross sections for multichannel reactions that are modified by the strong laser field. 相似文献
15.
Kunihiro Shima 《Physics letters. A》1980,77(4):237-239
Near the threshold energy, electron induced Mn and Cu K-shell ionization cross sections have been measured. Except for energies very close to threshold, the results are in good agreement with the semi-empirical formula of Green and Cosslett. 相似文献
16.
用扭曲波方法计算Al~(10+)基态在Is~22s的Is,2s电子和第一激发态Is~22p的2p电子的电离截面以及基态的总电离截面(包括内壳层激发自电离).入射电子能量(?)(即(?)以2s电离能I_(2s)为单位)为1.05,1.125,l.25,1.5,2.25,4……同时计算出了电离阈值以下的激发截面(乘以所谓态密度),实现了在电离阈值处与阈值以上电离能量微分截面光滑联接;计算了光电离截面积分值,实现了在入射电子能量趋于无穷时与电子碰撞电离截面衔接.计算结果与其他方法进行了比较.
关键词: 相似文献
17.
Accurate partial and integral cross sections for chemi-ionization have been calculated for a two-state model representing collisions between ground state K and I atoms from threshold to 6 eV relative energy using a coupled equations method. In addition, these quantities have been calculated in the Landau-Zener and Stueckelberg approximations. They furnish results for the charge transfer channel which agree with the accurate ones, down to the threshold energy, to within 7%. The integral cross sections for charge neutralization are obtained from the ionization cross sections by microscopic reversibility, and it diverges asE ?1. 相似文献
18.
It has been shown that the excitation of autoionization states at collisions of keV ions with a solid is decisive for inelastic energy loss and, correspondingly, the electronic stopping power dE/dx. It has been proposed to estimate the electronic stopping power dE/dx using the relation of cross sections for the excitation of autoionization states to ionization cross sections. When ionization cross sections are unknown, scaling is used to calculate ionization cross sections at the excitation of the L and M shells. A threshold dependence of the electronic stopping power dE/dx on the energy of bombarding ions has been predicted. 相似文献
19.
F. A. Shelat K. N. Joshipura K. L. Baluja P. Bhowmik H. N. Kothari 《Indian Journal of Physics》2011,85(12):1739-1748
Various electron scattering processes are examined theoretically for the strongly polar lithium hydride molecule. We have
introduced a realistic dipole potential to calculate rotational cross sections of LiH upon electron impact. From the ionization
threshold onwards total cross sections for elastic and inelastic scattering are evaluated in the complex molecular potential,
and total ionization cross sections are extracted by CSP-ic method developed in recent years. While most of the results are new some indirect comparisons are made to draw conclusions. 相似文献