Cr~(21+)离子1s~23d-1s~2nf的跃迁能和偶极振子强度(英文)

用全实加关联方法计算了类锂Cr21+离子1s23d-1s2nf(4≤n≤9)的跃迁能和1s2nf(n≤9)态的精细结构.在类氢近似下估算了对能量的高阶相对论修正.依据量子亏损理论,确定了Rydberg系列1s2nf的量子数亏损.据此可以实现对任意高激发态(n≥10)的能量的可靠预言.计算了Cr21+离子1s23d-1s2nf(4≤n≤9)跃迁的振子强度.与量子亏损理论相结合,得到该离子从1s23d态到电离阈附近高激发束缚态间的偶极跃迁振子强度以及到相应连续态跃迁的振子强度密度,从而将Cr21+离子的这一重     

Sc+18离子1s23d-1s2nf的跃迁能和偶极振子强度

用全实加关联方法计算了类锂Sc+18离子1s23d-1s2nf(4≤n≤9)的跃迁能和1s2nf(n≤9)态的精细结构. 依据量子亏损理论确定了该Rydberg系列的量子数亏损,用这些作为能量的缓变函数的量子亏损,可以实现对任意高激发态(n≥10)的能量可靠的预言. 利用在计算能量过程中确定的波函数,计算了Sc+18离子1s23d-1s2nf的偶极跃迁在三种规范下振子强度;将这些分立态振子强度与量子亏损理论相结合,得到在电离阈附近束缚态-束缚态跃迁振子强度以及束缚态-连续态跃迁振子强度密度,从而将Sc+18离子的这一重要光谱特性的理论预言外推到整个能域.     

Sc+18离子1s23d-1s2nf的跃迁能和偶极振子强度

用全实加关联方法计算了类锂Sc 18离子1s23d-1s2nf(4≤n≤9)的跃迁能和1s2nf(n≤9)态的精细结构。依据量子亏损理论确定了该Rydberg系列的量子数亏损,用这些作为能量的缓变函数的量子亏损,可以实现对任意高激发态(n≥10)的能量可靠的预言。利用在计算能量过程中确定的波函数,计算了Sc 18离子1s23d-1s2nf的偶极跃迁在三种规范下振子强度;将这些分立态振子强度与量子亏损理论相结合,得到在电离阈附近束缚态-束缚态跃迁振子强度以及束缚态-连续态跃迁振子强度密度,从而将Sc 18离子的这一重要光谱特性的理论预言外推到整个能域。     

Ti19+离子1s23d-1s2nf的跃迁能和振子强度

用全实加关联方法计算了类锂Ti19 离子1s23d-1s2nf(4≤n≤9)的跃迁能、振子强度及1s2nf(n≤9)态的精细结构劈裂.依据单通道量子亏损理论,确定了该Rydberg系列的量子数亏损.用这些作为能量的缓变函数的量子亏损,可以实现对任意高激发态(n≥10)的能量的可靠预言.将这些分立态振子强度与单通道量子亏损理论相结合,得到在电离阈附近束缚态间的偶极跃迁振子强度以及束缚态-连续态跃迁的振子强度密度,从而实现了Ti19 离子量子跃迁特性的全能域理论预言.     

Ti19+离子1s23d-1s2nf的跃迁能和振子强度

用全实加关联方法计算了类锂Ti19+离子1s23d～1s2nf(4≤n≤9)的跃迁能、振子强度及1s2nf(n≤9)态的精细结构劈裂.通过确定该Rydberg系列的量子数亏损,进而实现对任意高激发态(n≥10)的能量的可靠预言.将上述分立态振子强度与单通道量子亏损理论相结合,得到在电离阈附近束缚态间的跃迁振子强度与束缚态-连续态跃迁的振子强度密度,从而实现了Ti19+离子量子跃迁特性的全能域理论预言.     

Sc^＋18离子1s^23d-1s^2nf的跃迁能和偶极振子强度

用全实加关联方法计算了类锂Sc^＋18离子1s^23d-1s^2nf（4≤n≤9）的跃迁能和1s^2nf（n≤9）态的精细结构，依据量子亏损理论确定了该Rydberg系列的量子数亏损，用这些作为能量的缓变函数的量子亏损。可以实现对任意高激发态（n≥10）的能量可靠的预言，利用在计算能量过程中确定的波函数，计算了Sc^＋18离子1s^23d-1s^2nf的偶极跃迁在三种规范下振子强度；将这些分立态振子强度与量子亏损理论相结合，得到在电离阚附近束缚态，束缚态跃迁振子强度以及束缚态．连续态跌迁振子强度密度，从而将Sc^＋18离子的这一重要光谱特性的理论预言外推到整个能域。     

Fe23+离子1s22s-1s2np的跃迁能和偶极振子强度

用全实加关联方法计算了类锂Fe23 离子1s22s-1s2np(2≤n≤9)的跃迁能和1s2np(n≤9)态的精细结构.依据单通道量子亏损理论,确定了Rydberg系列1s2np的量子数亏损.用这些作为能量的缓变函数的量子亏损,可以实现对任意高激发态(n≥10)的能量的可靠预言.用在计算能量过程中确定的波函数,计算了Fe23 离子1s22s-1s2np(2≤n≤9)跃迁的振子强度.将这些分立态振子强度与单通道量子亏损理论相结合,得到该离子从基态到电离阈附近高激发束缚态间的偶极跃迁振子强度以及束缚态-连续态跃迁的振子强度密度,从而将Fe23 离子的这一重要光谱特性的理论预言外推到整个能域.     

V20+离子1s23d-1s2nf的跃迁能和振子强度

用全实加关联方法计算了类锂V20 离子1s23d-1s2nf的跃迁能和偶极振子强度.依据量子亏损理论,确定了1s2nf系列的量子数亏损,用这些作为能量的缓变函数的量子亏损,实现对该Rydberg系列任意高激发态(n≥10)的能量的可靠预言.将这些分立态振子强度与量子亏损理论相结合,得到在电离域附近束缚态间的偶极跃迁振子强度以及束缚态-连续态跃迁的振子强度密度,从而将V20 离子的这一重要光谱特性的理论预言外推到整个能域.     

V20+离子1s23d-1s2nf的跃迁能和振子强度

用全实加关联方法计算了类锂V20+离子1s23d-1s2nf的跃迁能和偶极振子强度.依据量子亏损理论, 确定了1s2nf系列的量子数亏损,用这些作为能量的缓变函数的量子亏损,实现对该Rydberg系列任意高激发态(n≥10)的能量的可靠预言.将这些分立态振子强度与量子亏损理论相结合,得到在电离域附近束缚态间的偶极跃迁振子强度以及束缚态-连续态跃迁的振子强度密度,从而将V20+离子的这一重要光谱特性的理论预言外推到整个能域.     

Mn22+离子1s23d1s2nf的跃迁能和振子强度

用全实加关联方法计算了类锂Mn22 离子1s23d-1s2nf(4≤n≤9)的跃迁能和1s2nf(n≤9)态的精细结构,在类氢近似下估算了对能量的高阶相对论修正.依据量子亏损理论,确定了Rydberg系列1s2nf的量子数亏损,据此可以实现对任意高激发态(n≥10)的能量的可靠预言.计算了Mn22 离子1s23d-1s2nf(4≤n≤9)偶极跃迁的振子强度.     

类锂离子(Z=11～20)1s~22s-1s~23p的跃迁能和振子强度

用全实加关联方法计算类锂离子 (Z =11～ 2 0 )偶极跃迁 1s2 2s 2 S - 1s2 3p 2 P , 的跃迁能。非相对论能量用Rayleigh -Ritz变分法确定 ,相对论修正和质量极化效应用微扰论计算 ,还估算了来自量子电动力学效应的修正。得到的计算结果与现有的实验数据符合得很好 ,我们关于氯的类锂离子 (Z =17) 1s2 3p态的精细结构劈裂的计算结果揭示 ,相应的实验数据明显偏离等电子序列的物理规律。还算了 1s2 2s -1s2 3p偶极跃迁的振子强度     

碳原子1s~22s~22pns~3P态的能量和波函数

提出了构造碳原子1s~22s~22pns~3P态波函数的新方法,以Rayleigh-Ritz变分法为基础开发了一套计算碳原子1s~22s2~2pns~3P态波函数和能量的Mathemtica程序,具体计算了碳原子1s~22s~22pns~3P(n=3～6)态的波函数和非相对论能量及其相对论修正值(包括质量修正、单体达尔文修正、双体达尔文修正、自旋-自旋接触相互作用修正),计算结果与实验值非常接近.     

s~(1/2)=355GeV附近的R值测量

利用北京谱仪 (BES)在s=3.5 5GeV附近获取的总积分亮度约为 5 pb-1的实验数据 ,测量了e e-湮没强子产生截面与 μ子对产生截面的比值 (即R值 ) .其测量误差比其它实验组已发表的此能区的测量误差减小约 5 0 % .     

碳原子1s~22s~22pns~3P态精细结构的理论计算

提出了构造碳原子1s~22s~22pns ~3P态波函数的新方法,以多电子原子精细结构哈密顿的球张量形式和不可约张量理论为基础,开发了一套计算碳原子1s~22s~22pns ~3P态精细结构的Mathemtica程序,具体计算了碳原子1s~22s~22pns ~3P(n=3～6)态的精细结构(包括自旋-轨道相互作用、自旋-其它轨道相互作用和自旋-自旋相互作用),计算结果与实验值非常接近.     

A numerical Hartree self-consistent field calculation of an autoionization resonance parameters for a doubly excited 2s~2, 3s~2, and 4s~2 states of He atom with a complex absorbing potential

The self-consistent Hartree-Fock equation for the He atom is solved using the pseudospectral method. The Feshbachtype autoionization resonance parameters for doubly excited 2s~2, 3s~2, and 4s~2 ~1S states of He have been determined by adding a complex absorbing potential to the Hamiltonian. The Riss–Meyer iterative and Pad′e extrapolation methods are applied to obtain reliable values for the autoionization resonance parameters, which are compared to previous results in the literature.     

The impact of ATLAS and CMS single differential top-quark pair measurements at s~(1/2)= 8 TeV on CTEQ-TEA PDFs

By applying the Error PDF Updating Method,we analyze the impact of the absolute and normalized single differential cross-sections for top-quark pair production data from the ATLAS and CMS experiments at the Large Hadron Collider,at a center-of-mass energy of s~(1/2)=8 TeV,on the CT14HERA2 PDFs.We find that the top quark pair single differential distributions provide minor constraints on the CT14HERA2 gluon PDF when the nominal CT14HERA2 inclusive jet production data are included in the fit.Larger constraints on the gluon distribution are present when the jet data are removed(CT14HERA2mJ) and/or when increased weights are given to the top data in the CT14HERA2 fits.The weighted tt data provide significant constraints on the CT14HERA2mJ gluon PDF,which are comparable to those obtained from inclusive jet production data.Furthermore,we examine the top quark mass sensitivity of the top-quark pair single differential distributions.     

Large angle radiation effect on jet measurement in pp collisions at s~(1/2)=7 TeV at the LHC

Jet measurement is an ideal probe to explore the properties of the hot dense matter created in ultrarelativistic heavy-ion collisions. Recent results at the LHC show that large angle radiation is non-negligible, but the mechanisms and phenomenology of large angle radiation are still unclear and hotly debated. Considering the coexistence and competition of different physics mechanisms qualitatively, it is assumed that the radiation angle is enhanced randomly over a wide range based on the collinear approximation. Its effects on di-jet momentum imbalance, jet fragmentation function and jet shape are studied in pp collisions at 7 TeV. The results show that di-jet asymmetry is insensitive to large angle radiation, while jet shape and jet fragmentation functions are more sensitive and could explain experimental data well. We conclude that de-collimated radiation cannot be ignored for soft jets,and there is a contribution from large angle radiation(φ 0.7) of about 8%, which is significant for jet intrinsic structure measurement at p T,jet 80 GeV/c.     

Comparative study of the forward and backward methods for calculating jet properties in pp collisions at s~(1/2)=7 TeV

We propose a forward method based on PYTHIA6.4 to study the jet properties in ultra-relativistic pp collisions.In the forward method,the partonic initial states are first generated with PYTHIA6.4 and then hadronized in the Lund string fragmentation model,and finally the hadronic jets are constructed from the created hadrons.Jet properties calculated with the forward method for pp collisions at √s=7 TeV are comparable to those calculated with the usual anti-kt algorithm(backward method)in PYTHIA6.4.The comparison between the backward and forward methods may contribute to the understanding of the partonic origin of jets in the backward method.     

类锂离子C^3＋激发态（1s^2 2p）^2P光电离的计算

文中首次运用R—矩阵方法，在三态密耦近似下计算了类锂离子C^3 激发态(1s^2 2p)^2P光电离截面，主要给出了不同过程和不同分波的光电离截面。计算结果显示了光电离过程中非常丰富的Rydberg系列共振结构。