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31.
Hyperfine Interactions - First off-line tests at the ion trap facility SHIPTRAP took place. The facility is being set up to deliver very clean and cooled beams of singly-charged recoil ions (Rare... 相似文献
32.
We developed a metalloporphyrin-based molecular container capped with a calix[4]arene, and its rigid cavity distinguished the slight structural differences in the aromatic guests. 相似文献
33.
34.
T. Yamaguchi N. Yamamoto M. Inui S. Tsutsui 《Journal of Physics and Chemistry of Solids》2005,66(12):2246-2249
Inelastic X-ray scattering experiments on sub- and supercritical water were performed to investigate collective dynamics of this unique solvent. Analysis within a generalized Langevin formalism shows that the positive dispersion of the sound velocity, as compared to the hydrodynamic value, first decreases (1.0<ρ<0.8 g cm−3) at all measured momentum transfers (1.3-10.7 nm−1), and then increases (0.7<ρ<0.26 g cm−3) again only at higher momentum transfers. We suggest the initial decrease is due to approaching the percolation limit in the number of hydrogen bonds, and the subsequent increase is due to the formation of rigid dimers in sub- and supercritical water. 相似文献
35.
We theoretically examine the momentum dependence of resonant inelastic X-ray scattering (RIXS) spectrum for one-dimensional and two-dimensional cuprates based on the single-band Hubbard model with realistic parameter values. The spectrum is calculated by using the numerical diagonalization technique for finite-size clusters. We focus on excitations across the Mott gap and clarify spectral features coming from the excitations as well as the physics behind them. Good agreement between the theoretical and existing experimental results clearly demonstrates that the RIXS is a potential tool to study the momentum-dependent charge excitations in strongly correlated electron systems. 相似文献
36.
本文介绍高空间位阻的五苯基环戊二烯基氯化镥(包括单取代和双取代)的合成及鉴定。这二化合物要比文献上迄今所报道的其它稀土有机化合物有更高的空气稳定性。 相似文献
37.
Tetsuo Tsutsui Ryuichi Tanaka Takehide Tanaka 《Journal of Polymer Science.Polymer Physics》1976,14(12):2273-2284
Six 6,10-ionenes with different counterions were prepared by ion exchange reactions in aqueous solutions. The counterions were Br, I, CIO4, BF4, SCN, and B(C6H5)4. The dynamic mechanical properties of these polymers were investigated by use of a torsional braid analyser. Three relaxations α (25–140°C), β (?30–0°C), and γ (?140–120°C) were observed at the frequencies of 0.3–0.8 Hz. The temperature of the α and β relaxations were largely dependent on the size of counterions, but those of the γ relaxations had little variation. The effects of electrostatic forces in the polymers on each relaxation was discussed. The influence of absorbed water on the α, β, and γ relaxations was examined. The absorbed water in the polymers greatly depressed the temperature of the α relaxations and this phenomenon was interpreted to be the result of the specific hydration on ionic portions. 相似文献
38.
L. O'Raifeartaigh P. Ruelle I. Tsutsui A. Wipf 《Communications in Mathematical Physics》1992,143(2):333-354
The generalized Toda theories obtained in a previous paper by the conformal reduction of WZNW theories possess a new class ofW-algebras, namely the algebras of gauge-invariant polynomials of the reduced theories. An algorithm for the construction of base-elements for theW-algebras of all such generalized Toda theories is found, and theW-algebras for the maximalSL(N,R) generalized Toda theories are constructed explicitly, the primary field basis being identified. 相似文献
39.
K. Tatsumi M. Tsutsui G.W. Beall D.F. Mullica W.O. Milligan 《Journal of Electron Spectroscopy and Related Phenomena》1979,16(1):113-118
Using the direct CI method perturbation corrections to the Koopmans ionization energies have been obtained up to order 10 for the molecules CN? and H2O. The results are compared with those from the fully converged CI and Bk-type calculations. The convergence of the perturbation series is found to be quite slow although substantial improvement is possible using a variation-perturbation method. 相似文献
40.
The system to be considered in this paper is