RbⅧ—NbⅪ离子n=4complex跃迁谱线、波长和振子强度

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。     

RbⅧ-NbⅫ离子n＝4 complex跃迁谱线、波长和振子强度

用HXR方法计算了类锌等电子序列RbⅧ-NbⅫ离子n＝4 complex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ΔE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FORTRAN程序对上述组态各能级值进行了系统的拟合计算.给出了4s2-4s4p,4s4p-4s4d跃迁谱线波长和相应的振子强度.     

CsLiSO4/NH4LiSO4 system investigated by EPR

The single crystals of CsLiSO₄ and the solid solutions Cs _x (NH₄)_{(1? x )}LiSO₄ have been investigated using the EPR technique. Two kinds of vanadyl doped samples were considered – as-grown from the aqueous solutions of appropriate compounds and after a thermal treatment. It has been established that in as-grown crystals the EPR spectra of vanadyl ions were very complex due to the presence of more than one paramagnetic site in the lattice. At least two such sites were identified and spin Hamiltonian parameters were calculated for all the sites. After annealing the crystals at about 400?K, a significant decrease in the intensities of the EPR lines of VO²⁺ complexes was observed. In well-annealed samples the complexity of the EPR spectra has been found to disappear. Additionally, the third kind of vanadyl complexes were created during this treatment. It has also been shown that the EPR spectra of Cr³⁺ ions in CsLiSO₄ could be observed without any additional sample treatment reported in literature like an irradiation or thermal decomposition. It was established that the VO²⁺ and Cr³⁺, being sensitive to structural phase transition in the CsLiSO₄, can be used as a probe for the structural changes in the CsLiSO₄/NH₄LiSO₄ system.     

TcⅪ离子的4s~24p~3—4s4p~4跃迁

通过对KrⅣ—MoⅩ离子4s4p~4组态能级结构的组态相互作用理论分析,找出了其沿等电子系列变化的规律性。在此基础上预言了TcⅪ离子的4s4p~4组态能级。结合前人对4s~24p~3组态的研究结果,进一步计算了4s~24p~3—4s4p~4跃迁的谱线波长和振子强度。     

Coxeter groups A4, B4 and D4 for two-qubit systems

The Coxeter–Weyl groups W(A₄), W(B₄), and W(D₄) have proven very useful for two-qubit systems in quantum information theory. A simple technique is employed to construct the unitary matrix representations of the groups, based on quaternionic transformation of the usual reflection matrices. The von Neumann entropy of each reduced density matrix is calculated. It is shown that these unitary matrix representations are naturally related to various universal quantum gates and they lead to entangled states. Canonical decomposition of generators in terms of fundamental gate representations is given to construct the quantum circuits.     

Rotationsstruktur von4 Σ→4 II-Banden

Zeitschrift für Physik A Hadrons and nuclei - Zwecks Aufstellung von Richtlinien für die Rotationsanalyse der O 2 + - Quartettbanden werden unter Mitberücksichtigung der...     

类镓等电子序列ZrX—RhXV离子的4s^24p—4s^24d,4s^24p—4s4p^2,4s^24 …

本文对类镓等电子序列ＧａＩ－ＸｅＸＸＩＶ离子４ｓ＾２４ｐ、４ｓ＾２４ｐ、４ｓ＾２４ｄ、４ｓ４ｐ＾２、４ｐ＾３和４ｓ＾２５ｓ组态组级结果和组态相互作用了理论分析，找出沿等电子序列的变化规律。     

Superconducting anisotropy and vortex pinning in CaKFe_4As_4 and KCa_2Fe_4As_4F_2

The vortex pinning determining the current carrying capacity of a superconductor is an important property to the applications of superconducting materials.For layered superconductors,the vortex pinning can be enhanced by a strong interlayer interaction in accompany with a suppression of superconducting anisotropy,which remains to be investigated in iron based superconductors(FeSCs)with the layered structure.Here,based on the transport and magnetic torque measurements,we experimentally investigate the vortex pinning in two bilayer FeSCs,CaKFe₄As₄(Fe1144)and KCa₂Fe₄As4F₂(Fe12442),and compare their superconducting anisotropyγ.While the anisotropyγ≈3 for Fe1144 is much smaller thanγ≈15 in Fe12442 around Tc,a higher flux pinning energy as evidenced by a higher critical current density is found in Fe1144,as compared with the case of Fe12442.In combination with the literature data of Ba_0.72K_0.28Fe2As₂ and Nd Fe As_O0.82F_0.18,we reveal an anti-correlation between the pinning energy and the superconducting anisotropy in these Fe SCs.Our results thus suggest that the interlayer interaction can not be neglected when considering the vortex pinning in Fe SCs.     

Gedämpfter Laserverstärker und Phasenunschärfe

Damped Laser Amplifier and Phase Uncertainty In extension of a paper about the possibility to measure the phase of a microscopic field by linear amplification the damping is introduced in the linear amplifier. For this end the Fokker-Planck equation is solved and a quasiprobability distribution is obtained for an arbitrary initial state. With the help of this distribution the phase uncertainty for the largely amplified field is calculated. It is shown that appreciable damping destroys the result which was obtained for a lossless laser amplifier.     

Laser Microprobe Mass Analysis of NH4 ReO4, AgReO4 and Al (ReO4)3

The laser microprobe mass analyzer (LAMMA) is a recently developed mass spectroscopic technique for both organic and inorganic microanalysis. LAMMA analysis involves laser ionization of the sample material followed by mass separation in a time of flight (TOF) mass spectrometer. The present application of LAMMA illustrates the characterization of three inorganic perrhenates: NH₄ReO₄, AgReO₄ and Al(ReO₄)₃. Results clearly show the value of LAMMA for inorganic mass spectrometry, in this study the most useful data originated in the negative-ion mass spectra.     

The 4s~24p~3—4s4p~4 transition in Cd ⅩⅥ

The available experimental energies for the 4s~24p~3 and 4s~4p~4 configurations in As Ⅰ—like Sr Ⅵ—Ag Ⅹ Ⅴions are compared with the values calculated using the Hartree—Fock method including configuration interaction and relativistic corrections. Some energy values of the 4s~24p~3 configuration in Rh Ⅹ Ⅲ、Pd Ⅹ Ⅳ and Ag Ⅹ Ⅴ ions are improved and all the energies、wavelengths and transition probabilities of the 4s~24p~3—4s4p~4 transition array in Cd Ⅹ Ⅵ are presented.     

Chemical exchange in KHSeO4 and NH4HSeO4 studied by two-dimensional NMR

The microscopic mechanism of proton transport in partially deuterated potassium hydrogen selenate (KHSe) and in partially deuterated ammonium hydrogen selenate (AHSe) were studied by means of one-dimensional Fourier transform²H nuclear magnetic resonance (NMR), two-dimensional²H NMR and dielectric measurements over a wide temperature range. In both systems, KHSe and AHSe, the slow chemical exchange processes of deuterons between different hydrogen bridges occur. It was established that the rates of exchange between deuteron sites, which are involved in infinite chains of hydrogen bonds, are approximately the same for both crystals. The rates of exchange between these positions and the deuterons in the dimer groups of KHSe are approximately hundred times more slowly. On the basis of our findings, we discuss the models of the microscopic mechanism of hydrogen transport for both substances.     

Incommensurability and metastability problems in NH4HSeO4 and ND4DSeO4: A reinvestigation of phase diagrams

Abstract

X-ray and neutron diffraction results on NH₄HSeO₄ and ND₄DSeO₄ are reported. Direct evidence of an incommensurate phase sandwiched between the monoclinic high-temperature phase (space group B2) and the low-temperature ferroelectric lock-in phase k = ? (space group P1) has been obtained in NH₄HSeO₄. The phase situation is more complicated in ND₄DSeO₄, where an incommensurate phase is found sandwiched between the B2 phase and a lock-in phase k = ¼ and where a phase in which several modulations coexist has been discovered in between the two lock-in phases k = ¼ and k = ?. The non-equilibrium processes, also present in ND₄DSeO₄, have been identified. All these results have clarified the situation about the phase diagram.