原子激发态的二体电子关联变分计算

本文将Wilets等人提出并由作者加以改进的二体电子关联变分方法推广到多电子原子一般激发态结构的计算。对He原子及其等电子系列(1s)(nl)电子组态的激发单重态n¹L、三重态n³L,Be原子及其等电子系列(1s)²(2s)(nl)³L和B原子(1s)²(2s)²(nl)²L等激发态进行了计算,结果表明:这种方法的波函数结构简单,便于应用,不仅计算量小, 关键词：     

n+-Si与p-Si衬底上含纳米硅的SiO2膜电致发光

对于Au/富Si-SiO₂/p-Si和Au/富Si-SiO₂／n⁺-Si这两种结构，研究并比较了它们的电致发光特性．对于前者，当正向偏压大于4V时发射红光，而加反向偏压时不发光；对于后者，加正向偏压不发光，而当反向偏压大于3.5V时发射红光．着重讨论了Au/富Si-SiO₂/n⁺-Si的电致发光机制 关键词：     

高激发态钠原子的量子拍实验的某些分析

本文推导了一个量子拍实验中观察量的解析表式,与实验对比可得n²D态钠原子的精细裂距,其它特征也与实验符合。同时还讨论了上述高激发态钠原子在弱电场中的能态变化特性,指出了观察此特性的可能实验方法。 关键词：     

Au原子高Rydberg态场致电离的实验研究

利用电热法将含金物质加热,产生Au原子束,再以两束UV脉冲激光垂直照射,将处于基态的Au原子共振激发至高Rydberg态。滞后于激光脉冲200ns的高压脉冲电场(6500V/cm)加到反应区,使处于Rydberg态的Au原子电离。激光波长在一定范围内扫描,共测出了Au原子的n²D_3/2(n=18—38)和n²S_1/2(n=21—34;36—38)两通道的38条能级的位置。用参数拟合得到²D_3/2和²S_1/2两系列的极限分别为:E_D=74409.8(3)cm^-1,E_S=74410.0(2)cm^-1,计算了每条能级的量子亏损。我们的实验还证明了场电离是一种十分有效的电离手段,比用通常的激光光电离效率要高得多。这在共振电离谱学(RIS)的研究中是一种很有效的方法。 关键词：     

Variation of dielectronic satellite intensity factors with n for dielectronic recombination processes in selected lithium—like ions

Satellite intensity factors F^*₂(s→f) have been calculated for the 1s²2s+εl→(1s²3l′nl″)^*→1s²2sml''+hν dielectronic recombination processes of lithium-like V, Cu, Se, Ag and Ba ions. The relevant atomic parameters have been calculated explicitly for all intermediate resonance states |s〉≡|1s²3l′nl″SLJ〉 with n=3－9 in the intermediate coupling scheme. The 1/n³ scaling, which has often been used in extrapolating F^*(s→f) for n≥4, is tested against these values of F^*₂(s→f).     

稀土化合物RX的晶场参数分析

本文对NaCl型结构的稀土化合物RX(X=N,P,As,Sb,Bi)的晶场参数B₄⁰的实验值进行了分析。在此基础上我们提出一个新的利用简单点电荷模型计算RX晶场参数B₄⁰值的关系式:B₄⁰=k₃(B₄⁰)_p+c₃。用此关系式我们确定了一系列RX的晶场参数B₄⁰值,结果与实验值符合很好。对关系式的含义本文也作了充分讨论。 关键词：     

低对称性晶场中3d5离子零场劈裂常数的计算

作为文献[4]的自然推广,本文讨论了低对称性(C_4v或D_4h,C_3v或D_3h)晶场中3d⁵离子零场劈裂常数D值的计算。给出D值依赖于Racah参数、晶场参数和自旋-轨道耦合常数ξ的表示式。用于α-Al₂O₃晶体中Fe³⁺,离子D值的计算,结果与实验值能够较好地符合。 关键词：     

(φ4As) CuCl3晶体中Cu2+-Cu2+离子对的EPR研究

本文在晶场理论的基础上,考虑了Cu²⁺-Cu²⁺离子间的交换作用后,得到了(φ₄As) CuCl₃晶体中Cu^2--Cu^2-离子对的跃迁能级,g-因子和零场分裂,计算结果与实验符合较好。     

PECVD分层结构对提高氢化非晶硅TFT迁移率的影响

为了进一步提高氢化非晶硅薄膜晶体管 (a-Si:H TFT) 的场效应电子迁移率, 研究了批量生产条件下对欧姆接触层和栅极绝缘层进行多层 制备, 不同的工艺参数对a-Si:H TFT场效应电子迁移率的影响. 研究表明随着对欧姆接触层 (n⁺层) 分层数的增加, 以及低速生长的栅极绝缘层 (GL层) 和高速生长的栅极绝缘层 (GH 层) 厚度比值提高, a-Si:H TFT的场效应迁移率得到提升. 当n⁺层分层数达到 3层, GL层和GH层厚度比值为4:11 时, 器件的场效应电子迁移率达到0.66 cm²/V·s, 比传统工艺提高了约一倍, 显著改善了a-Si:H TFT 的电学特性, 并在量产线上得到了验证. 关键词： 非晶硅薄膜晶体管 电子迁移率 欧姆接触层 栅极绝缘层     

γ辐照室温短波HgCdTe光伏器件的导纳谱研究

利用变频导纳谱研究了γ辐照前后Hg_1－xCd_xTe(x=0.6)n⁺-on-p结中的深能级缺陷．辐照前其缺陷能级位置在价带上0.15 eV,俘获截面σ_p＝2.9×10^-18cm²,缺陷密度N_t＝6.5×10¹⁵cm^-3,初步认为是Hg空位或与其相关的复合缺陷;经过10⁴Gy的γ辐照后其能级变得更深,在价带上0.19 eV,同时其俘获截面增加了近一个数量级,而缺陷密度基本上没有变化．γ辐照引入的这种能级变化最终使器件的性能(探测率)下降了1/2以上． 关键词：     

Modular bootstrap in Liouville field theory

The modular matrix for the generic 1-point conformal blocks on the torus is expressed in terms of the fusion matrix for the 4-point blocks on the sphere. The modular invariance of the toric 1-point functions in the Liouville field theory with DOZZ structure constants is proved.     

Nonperturbative weak-coupling analysis of the quantum Liouville field theory

Two independent weak-coupling expansions are developed for the Liouville quantum field theory on a circle. In the first, the coupling of the nonzero modes is treated as a perturbation on the exact solution to the zero-mode problem (quantum mechanics with an exponential potential). The second approach is a weak-coupling approximation to an explicit operator solution which expresses various Liouville operators as functions of a free massless field using a Bäcklund transformation. It is shown that the free state space associated with the latter solution must be restricted to the sector which is odd with respect to a type of “parity.” Various matrix elements are computed to order g¹⁰ using both approaches, yielding identical results.     

An exact operator solution of the quantum Liouville field theory

Exact, closed form results are given expressing the quantum Liouville field theory in terms of a canonical free pseudoscalar field. The classical conformal transformation properties and a Bäcklund transformation of the Liouville model are briefly reviewed and then developed into explicit operator statements for the quantum theory. This development leads to exact expressions for the basic operator functions of the Liouville field: ?_μΦ, and e^nΦ. An operator product analysis is then used to construct the Liouville energy-momentum tensor operator, which is shown to be equal to that of a free pseudoscalar field. Dynamical consequences of this equivalence are discussed, including the relation between the Liouville and free field energy eigenstates. Liouville correlation functions are partially analyzed, and remaining open questions are discussed.     

An average-magnetization analysis of R 1ρ relaxation outside of the fast exchange limit

Approximate expressions for the NMR spin relaxation rate constant in the rotating frame of reference R _1ρ are derived for two-site chemical exchange by consideration of the evolution of the average density operator using the stochastic Liouville equation. R _1ρ is obtained as a linearized approximation to the largest (least negative) eigenvalue of the matrix describing the evolution of the average density operator in the long-term limit. The expressions obtained are more accurate than existing expressions when exchange is not fast and the populations of the exchanging sites are close to equal. The new expressions for R _1ρ facilitate the interpretation of chemical exchange phenomena in proteins and other biological macromolecules.     

Construction of exponential Liouville field operators for closed string models

Operators for arbitrary exponentials exp(λφ) of a periodic Liouville field φ(τ,σ) are represented iteratively by an infinite power series in terms of a periodic scalar free field. Necessary quantum corrections of the Liouville operators with respect to their classical expressions are fixed by conformal covariance and locality. Canonical commutation relations for the Liouville field quantities are valid when the canonical quantization of the scalar free field is imposed. A quantum correction of the energy momentum tensor can be avoided thus preserving the conformal invariance of the Liouville theory.     

Multi-matrix models and genus one amplitudes

The genus one correlation numbers in the matrix models and the minimal Liouville gravity have been studied. The torus partition function for the matrix models, as well as the one- and two-point correlation numbers of the (3, p) matrix models and (3, p) minimal Liouville gravity, has been calculated.     

The Quantum R-Matrix via Canonical Quantization in the Liouville Theory

Starting from the classical Liouville theory, we study its quantum theory through canonical quantization. We find that if the Poisson bracket relations between two vectors are,dominated by the classical r-matrix in the classical case, their quantum analogue is replaced by the exchange relations dominated by the quantum R-matrix. The quantum group structure in the quantum LiouviUe theory is studied and the central charge of the quantum Liouville theory is also obtained.     

Integrability of Liouville System on High Genus Riemann Surface.Ⅰ. Classical Case

By using the theory of uniformization of Riemann surfaces,we study properties of the Liouville equation and its general solution on a Riemann surface of genus g>1.After obtaining Hamiltonian formalism in terms of free fields and calculating classical exchange matrices,we prove the classical integrability of Liouville system on high genus Riemann surface.     

Dynamical Lie algebra and conditional operators for many fermion Green functions

A method is introduced to calculate thermodynamic Green functions. A powerful theorem by Masson is the motivation for expressing the Fourier-time transform of the Green function as a super space matrix element of the resolvent of the Liouville operator. The eigenvalues of the Liouville operator are then expressed in a form first suggested by Judd for atomic systems and which are shown to be members of a Lie group.     

Generalized liouville equation,entropy, and dynamic systems containing limit cycles

The relation between the generalized Liouville equation, entropy production rates and autonomous systems of differential equations containing limit cycles is investigated. Moreover, the connection between the generalized Liouville equation and the Lie derivative of a differential form with respect to a vector field is discussed.