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基于全相对论扭曲波(RDW)电子碰撞激发计算程序REIE06,系统计算了Ca原子基态3p64s2 1S0到激发态3p64s4p 3P0,1,2 1P1精细结构能级的碰撞截面,总结了在不同入射电子能量下碰撞截面的变化规律。目前计算中,细致考虑了电子关联效应和Breit相互作用,计算结果与已有的理论计算进行比较,对实验值的相对误差较小。 相似文献
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基于相对论多组态Dirac-Fock(MCDF)方法的GRASP2K程序,通过系统的考虑电子关联效应和相对论效应,详细计算了71Ga原子的基态4s24p2P1/2、亚稳态4s24p2P3/2及激发态4s5s2S1/2的超精细结构常数.结果表明原子实的极化效应对超精细结构常数起到了重要作用. 相似文献
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本文给出了一套计算类氢离子电子碰撞激发截面和速率系数的实用参数,用于计算nl→n'l'跃迁数据,n=1,2,…,4,n'=2,3,…,8。适用范围:3 ≤ Z ≤ 74,n'≤5时,x≥2,n'>5时,x≥20。误差30%左右。 相似文献
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采用全相对论扭曲波方法,系统地计算了类铍N3+和 O4+离子从基态到2s2p和2p2 的各激发态以及从亚稳态到2p2各激发态的电子碰撞激发截面,详细地讨论了靶态的关联效应对激发截面的影响.结果表明:对于2s-2p的单电子激发,在低能碰撞时,靶态的电子关联效应起非常重要的作用,且使得激发截面降低;而高能碰撞时,靶态波函数的描述对连续态波函数的影响比较小,对激发截面影响也比较小.对于2s2-2p2的双电子激发,其中基态2s2 1 S0到J=0的2p2 3 P0,1S0的激发截面较大,其主要原因是末离子态波函数与基组态波函数的混合,但是其他几个激发的激发截面较小. 相似文献
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在Coulomb-Born交换似和Z标度类氢模型下,计算了“水窗”波段Cr^21+离子精细结构能级的电子碰撞激发截面和速率系数。计算过程中对有效核电荷的计算作了修改,使其更有效地反映碰撞过程中电子的关联和相对论效应。 相似文献
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利用基于多组态Dirac-Fock(MCDF)理论方法的原子结构和性质计算程序GRASP92和全相对论扭曲波电子碰撞激发计算程序REIE06,系统计算了类氖离子(Z=50—57)激发组态2s22p53l和2s2p63l(l=s,p,d)的能级结构和碰撞激发截面,总结了碰撞激发截面随入射电子能量的变化规律,讨论了实验中感兴趣的(2p1/23d3/2)1→2s22p61S0(标记为3C线)与(2p3/23d5/2)1→2s22p61S0(标记为3D线)跃迁线强度比值的沿等电子系列特性和强组态相互作用对高离化态类氖离子截面的影响. 相似文献
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利用全相对论扭曲波方法和研究电子碰撞激发过程的计算程序REIE06系统计算了类镍Au~(51+)离子从基态(3s~23p~63d~(10))n=3壳层3 l(l=s、p、d)电子激发到4 l、5 l(l=s、p、d、f)的碰撞激发强度和截面,研究了在不同入射电子能量下截面的变化规律,通过对类镍Au51+离子涉及X射线激光跃迁的相关能级电子碰撞激发速率的计算,分析了等离子体中电子温度对碰撞过程的影响.部分计算结果与其它理论及实验结果进行了比较,取得了很好的一致性. 相似文献
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利用全相对论扭曲波(RDW)方法,系统计算了类铜Au50+离子的外壳层电子4s激发到4l 、5l ( l= s、p、d、f,除去4s-4s )和内壳层电子3l (l = s、p、d)激发到4l 、5l (l = s、p、d、f)的碰撞激发截面,研究了在不同入射电子能量下截面的变化规律,给出了3d-4f 和3d-5f 精细结构能级的碰撞激发截面。部分计算结果与其它理论及最新实验结果进行了比较,取得了很好的一致性。 相似文献
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利用全相对论扭曲波方法和研究电子碰撞激发过程的计算程序REIE06系统计算了类锌Au~(49+)离子从基态(3s~23p~63d~(10)4s~2)的4s、3d、3p和3s电子激发到4 l(l=p、d、f)和5 l(l=s、p、d、f)的碰撞激发强度,研究了在不同入射电子能量下碰撞强度的变化规律,通过对类锌Au~(49+)离子涉及金激光等离子体M带谱,3d→4f和3d→5f电子碰撞激发速率的计算,分析了等离子体中电子温度对碰撞过程的影响.部分计算结果与其它理论及实验结果进行了比较,取得了很好的一致性. 相似文献
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利用全相对论扭曲波(RDW)方法,系统计算了类铜Au50+离子的外壳层电子4s激发到4l 、5l ( l= s、p、d、f,除去4s-4s )和内壳层电子3l (l = s、p、d)激发到4l 、5l (l = s、p、d、f)的碰撞激发截面,研究了在不同入射电子能量下截面的变化规律,给出了3d-4f 和3d-5f 精细结构能级的碰撞激发截面。部分计算结果与其它理论及最新实验结果进行了比较,取得了很好的一致性。 相似文献
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Cross sections for electron impact excitation of lithium from the ground state 1s^22s to the excited states 1s2s^2, 1s2p^2, 1s2snp (n = 2-5), 1s2sns (n = 3 5), 1s2pns (n = 3-5), and 1s2pnp (n = 3-5) are calculated by using a full relativistic distorted wave method. The latest experimental electron energy loss spectra for inner-shell electron excitations of lithium at a given incident electron energy of 2500 eV [Chin. Phys. Lett. 25 (2008)3649] have been reproduced by the present theoretical investigation excellently. At the same time, the structures of electron energy loss spectra of lithium at low incident electron energy are also predicted theoretically, it is found that the electron energy loss spectra in the energy region of 55-57eV show two-peak structures. 相似文献
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基于全相对论扭曲波(RDW)电子碰撞激发计算程序REIE06,系统计算了类氦Fe~(24+)离子基态1s~(21)S_0到激发态1s2s和1s2p精细结构能级的碰撞强度和截面,分析了在不同入射电子能量下碰撞强度的变化规律,详细研究了在6.86 Ke V和9.94 Ke V能量下,碰撞辐射级联效应对类氦Fe~(24+)离子w线(1s~(21)S_0→1s2p~1P_1)、x线(1s~(21)S_0→1s2p~3P_2)、y线(1s~(21)S_0→1s2p~3P_1)和z线(1s~(21)S_0→1s2s~3S_1),x/w、y/w和z/w线强度比值的影响,总结了一些有意义的结论.部分计算结果与其它实验和理论结果进行了比较,取得了很好的一致性. 相似文献
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A programme is developed to calculate the polarizations of the radiation emitted after electron impact excitation. The fully relativistic distorted-wave method is used in cross-section calculations. The programme is applied to He- and Li-like ions. The calculated values of line polarization are compared with other theoretical results and experimental values. For He-like U, at lower incident energy, the present polarization agrees with the other theoretical ones within 1%, while at higher energy, the differences increase up to about 10%. For He-like Fe and Ti, the present results of polarization degree for most of the lines agree with the experimental data within the experimental error bars. For the Li-like Ti line q (ls2s2p^2p3/2 to ls^22s), the present value of the polarization agree excellently with another theoretical one, and both the values are consistent with the measured data within the experimental error bar. 相似文献
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The collision strengths of Be-like neon ion for excitation from ground state 2s2(1S0) to nine excited states (principal quantum number n=2) by electron impact are presented.filly relativistic distorted-wave Born (RDWB) program [CHEN Guoxin, Phys. Rev. A53 (1996) 3227] is used for the calculations. Two transitions are compared with other's work. The rest seven transitions are predicted without other ROWB calculations. There are several detailed considerations in our procedures, so the present results should be reliable and accurate. 相似文献
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M. Ismail A. Farraga H. A. Abdusalam Th. El-Sherbini 《International Journal of Theoretical Physics》2004,43(1):111-125
The scattering of electrons by atomic copper has been studied using Born approximation and the concept of the generalized oscillator strength (GOS). Differential and total cross-sections for the excitation of the 3d10 4p2 P state are calculated at incident energies of 100 eV and are compared with other available experimental and theoretical data. The agreement between our calculation for the differential cross-section and the available experimental results is fairly good at the forward angles, while the agreement at large angles is poor. The calculated total cross-sections are compared with the experimental data and those predicted by several theories. It is found that our calculation for the total cross-sections are in a good agreement with the close coupling calculation of Msezane and Henry (1986a, Physical Review A
33, 1631) for incident energies greater than 20 eV. The integrated cross-section measurements of Ismail and Teubner (1995, Journal of Physics B: Atomic, Molecular and Optical Physics
28, 4164) are in good agreement with the present calculation. 相似文献