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1.
在对类氟等电子系列MgⅣ-TiⅩⅣ离子奇宇称激发态及其间的组态相互作用详细分析的基础上,利用组态相互作用的半经验方法,精确预言了pⅦ离子2P~43p组态的所有精细结构能级以及2p~43P—2p~43s,3d跃迁的谱线波长和振子强度。
关键词: 相似文献
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利用基于全相对论框架下的多组态Dirac-Fock理论方法发展起来的程序包GRASP92和新发展的处理辐射跃迁过程的程序REOS99,计算了类镍等电子系列离子(Z=45-95)的基组态3s23p63d10 1S0以及低激发组态3s23p63d94l,3s23p53d104l和3s3p63d104 l(l=s,p,d,f)的能级及其向基态的M1,M2,E2禁戒跃迁概率.通过分析高离化类镍离子在特定的原子序数范围内由于存在能级交叉而产生的强组态相互作用,解释了高离化类镍离子禁戒跃迁概率的反常变化现象,探讨了禁戒跃迁概率受强组态相互作用影响而变化的一般规律. 相似文献
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利用基于全相对论框架下的多组态Dirac-Fock理论方法发展起来的程序包GRASP92和新发展的处理辐射跃迁过程的程序REOS99,计算了类镍等电子系列离子(Z=45—95)的基组态3s23p63d101S0以及低激发组态3s23p63d94l,3s23p53d104l和3s3p63d104l(l=s,p,d,f)的能级及其向基态的M1,M2,E2禁戒跃迁概率.通过分析高离化类镍离子在特定的原子序数范围内由于存在能级交叉而产生的强组态相互作用,解释了高离化类镍离子禁戒跃迁概率的反常变化现象,探讨了禁戒跃迁概率受强组态相互作用影响而变化的一般规律. 相似文献
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利用基于多组态Dirac-Hartree-Fock(MCDHF) 理论方法的相对论原子结构计算程序包GRASP2K, 细致计算了中性锂原子、类锂Be+, C3+, O5+, Ne7+, Ar15+, Fe23+, Mo39+, W71+及U89 + 离子基组态及较低的激发组态1s2nl (n = 2---4, l =s,p,d,f) 的精细结构能级, 以及各能级间发生电偶极(E1) 自发辐射跃迁的能量、概率及振子强度. 同时, 在非相对论极限下, 计算了其相关原子参数. 通过对相对论及非相对论计算结果的比较, 系统研究了相对论效应对类锂等电子系列离子能级结构及E1跃迁性质的影响, 揭示了随原子核电荷数Z变化时, 跃迁能、振子强度强烈依赖于量子数n, l, j变化的规律; 同时, 目前的计算结果与其他已有的理论计算及实验测量结果进行了比较. 相似文献
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使用全相对论组态相互作用方法, 能级-能级细致计算了0.1 EI ≤ kTe≤ 10 EI (EI是类钠离子基态的第一电离能) 温度范围内类氖离子基态双电子复合(DR)速率系数, 双激发自电离能级考虑了(2s2p)73ln'l', (2s2p)74l4l' 以及(2s2p)74l5l'组态. 对于(2s2p)73ln'l'双激发自电离组态, 轨道角量子数l' >8 的(2s2p)73ln'l'双激发自电离态对双电子复合速率系数的贡献可以忽略不计; (2s2p)73ln'l'双激发自电离组态的高里德堡态对双电子复合速率系数的贡献满足 n'-3组态-组态外推法, 并且核电荷数越大, 趋于n'-3标度的n'值越小; 对细致能级计算得到的类氖离子基态的总DR速率系数进行了拟合, 得到类氖离子基态的总DR速率系数随核电荷数 Z和电子温度变化的经验公式, 该拟合公式与细致计算结果的偏差在2%以内, 能较准确的计算任意核电荷数Z的类氖离子在0.1EI ≤ kTe ≤ 10EI电子温度范围的DR速率系数. Burgess-Merts(BM)近似公式不适用于估算低温(kTe<0.3 EI)类氖离子的DR速率系数, 在高温(kTe>2EI)时, 类氖离子的DR速率系数可以用BM近似公式表示. 相似文献
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E. Biemont 《Journal of Quantitative Spectroscopy & Radiative Transfer》1975,15(6):531-542
Hartree-Fock wavefunctions for 1s22s22p6nl (nl = 3,4,5s; 3,4,5p; 3,4,5d and 6f) configurations of the sodium isoelectronic sequence have been calculated up to Z = 26. Oscillator strengths for electric dipole transitions have been computed with the dipole length form of the transition matrix element. The study of systematic trends of these oscillator strengths along the isoelectronic sequence has allowed us to obtain new f-values and to improve some previous results. 相似文献
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采用相对论量子力学GRASP2程序,扩展平均能级EAL模型,有限核模型,考虑Breit和QED的高阶微扰修正,系统地研究了类硼等电子序列磁偶极M11s22s22p2P3/2—2P1/2(Z=10~100)光谱跃迁的精细能级结构间隔,跃迁概率和振子强度,所得结果和最近的实验数据及理论计算值进行了比较。计算结果表明:在ICF高温高密度激光等离子体中磁偶极矩M1跃迁几率过程不容被忽视。 相似文献
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S. N. Tiwary 《International Journal of Theoretical Physics》1993,32(11):2047-2051
We report the general trend of the nonrelativistic Hartree-Fock relativistic Hartree-Fock, nonrelativistic configuration-interaction, and relativistic configuration-interaction length form of the oscillator strengths for the resonance excitation 1s
22s
22p63s
2
S
J
e
1s
22s
22p
53s
2
2
P
J
o
. transition, which leads to autoionization (Auger transition), in Na, Mg1+, Al2+, Si3+, P4+, S5+, Cl6+, Ar7+, K8+, Ca9+, Sc10+, Ti11+, Fe15+, Cu18+, Zn19+, Br24+, and Kr25+ ions of the sodium isoelectronic sequence. 相似文献
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Discrepancies between theoretical and experimental estimates of the oscillator strengths of the sodium isoelectronic sequence resonance transition are considered in the light of recent multi-configuration Hartree-Fock results. Possible experimental difficulties in the cascading analysis arising from a peculiar pattern of excited-state lifetimes are examined using computer simulations of decay curves. 相似文献
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D.K. Datta S.K. Ghoshal S. Sengupta 《Journal of Quantitative Spectroscopy & Radiative Transfer》1976,16(1):49-52
Oscillator strengths for 11S?n1P transitions for some members of the helium isoelectronic sequence have been calculated by utilizing the dipole length, velocity and acceleration forms of the transition matrix element with coupled H.F. wave functions. Good agreement has been obtained between the values of the oscillator strengths. The quantities and decrease slowly with nuclear charge Z, whereas first increase to a maximum value and then decreases slowly. 相似文献
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简要地研究了高电离态硫原子的某能级跃迁振子强度f值,并对利用能级寿命确定出的振子强度结果做了简要讨论. 相似文献
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RbⅧ—NbⅪ离子n=4complex跃迁谱线、波长和振子强度 总被引:4,自引:0,他引:4
用HXR方法计算了类锌等电子序列RbⅧ-NbⅫ离子n=4complex组态能级,通过对各能级值沿等电子序列的变化规律分析,找出了ⅦE随Zc变化的一种新的拟合公式,运用此公式和我们自己设计的FOR-TRAN程序对上述组态各能级值进行了系统的拟合计算,给出了4s^2-4s4p,4s4p-4s4d跃迁谱线波长和相应的振子强度。 相似文献
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类铍离子N3+激发态的能量、振子强度和跃迁几率 总被引:2,自引:1,他引:1
利用多组态相互作用方法及Rayleigh-Ritz变分法,计算了类铍N3+ 基态(1s22s21S)和三个激发态(1s22s2p1P0, 1s22s2p3 P0, 1s22p23P)的能量,运用截断变分方法得到能量的改进量,包括了相对论能量和质量极化效应.计算了相关态的振子强度和辐射跃迁率.计算结果与其它理论和实验结果符合得很好. 相似文献
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Gültekin Çelik ?ule Ate? Selma Özarslan Mehmet Ta?er 《Journal of Quantitative Spectroscopy & Radiative Transfer》2011,112(14):2330-2334
The electric dipole transition probabilities, oscillator strengths and lifetimes have been calculated using the weakest bound electron potential model theory (WBEPMT) for singly ionized magnesium. In the calculations both multiplet and fine structure transitions are studied. We have employed both the numerical Coulomb approximation (NCA) method and numerical non-relativistic Hartree-Fock (NRHF) wave functions for expectation values of radii. The calculated oscillator strengths and lifetimes have been compared with MCHF results given by Fischer et al. (2006). A good agreement has been obtained with the MCHF results. Moreover, some new transition probabilities, oscillator strengths and lifetime values, not existing in the data bases for highly excited levels in singly ionized magnesium, have been obtained using this method. 相似文献
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Line strengthsS for the dipole allowed transitions within then=2 complex of the oxygen isoelectronic sequence have been fitted in the formZ
2
S=A+B/(Z −C), whereZ is the nuclear charge of a particular ion. The constantsA, B andC are determined by using a non-linear least square method. The data forS are taken from the configuration interaction calculations which included internal, semi-internal and all external type correlations
for ions in the rangeZ=8 − 25. It is shown that the values ofA obtained from the fit for all the transitions are in excellent accord with the ab-initio values obtained in the hydrogenic
limitZ → ∞ provided near degeneracy effects are included in the ground state multiplet 1s22s22p4
1S. 相似文献