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51.
The ordering of the Sc3+ and Ta5+ ions in Pb (Sc0.5Ta0.5) O3 can be varied by proper heat treatments (1000–1500°C). The ferroelectric → paraelectric transition is strongly influenced by this ordering. With decreasing order parameter Ω the phase transition becomes more diffuse and a number of properties show strong changes. 相似文献
52.
A procedure is explained to determined the amount of several pairs of diametrical loads applied to the outside boundary of
a ring when stresses at selected points of the inside or outside boundaries are known. Coefficients of influence are used,
following an approach similar to the one presented in a previous paper. Examples of application are given and the possible
increase in precision is shown when the number of points of measurements is larger than the number of loads to be determined. 相似文献
53.
O. Scholten K. Heyde P. van Isacker J. Jolie J. Moreau M. Waroquier J. Sau 《Nuclear Physics A》1985,438(1):41-77
States of mixed proton-neutron symmetry are investigated in different dynamical symmetries of the interacting boson model. We discuss in each of the limits the energy spectrum, the wave functions and the B(M1; 01+ → 1 1+) values. We also study three classes of transitional nuclei namely the Pd nuclei [U(5) → O(6)], the Sm nuclei [U(5) → SU(3)] and the Pt nuclei [O(6) → SU(3)] with respect to the energy of the lowest non-symmetric Jπ = 1+, 3+ levels as well as the M1 and M3 strengths for exciting these levels from the ground state. For 98Pd we compare this calculation with a shell-model calculation. Finally, we adress the problem of the mixing of the non-symmetric Jπ = 1+ state with nearby hexadecapole (g-boson) configurations. 相似文献
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55.
O. Scholten H. C. Wu A. E. L. Dieperink 《Zeitschrift für Physik A Hadrons and Nuclei》1989,332(1):1-7
The results of a calculation in the generalized seniority scheme for the odd-oddN=83 isotones is presented. Results are compared with data and with a calculation in the framework of the IBA model. From the latter estimates for parameters in the bosonfermion interaction have been obtained. 相似文献
56.
57.
J. P. Scholten H. J. Van Der Ploeg 《Journal of polymer science. Part A, Polymer chemistry》1973,11(12):3205-3213
The kinetics and mechanisms of propadiene polymerization under the influence of [Rh(CO)2Cl]2, Rh(CO)2P(C6H5)3Cl, Rh(CO)3Cl are reported. The reaction rates are first-order in Rh(CO)2P(C6H5)3Cl and Rh(CO)3Cl and half-order in [Rh(CO)2Cl]2. They are second-order in the substrate for Rh(CO)3Cl and [Rh(CO)2Cl]2 and first-order for Rh(CO)2P(C6H5)3Cl. The data are interpreted in terms of a common intermediate mechanism. The formation of this common intermediate is the rate-determining step. A solvent effect is also discussed. 相似文献
58.
Jürgen Heck P. Maurice J. A. Hermans Alex B. Scholten W. P. J. H. Bosman Gerd Meyer Thomas Staffel Rainer Stürmer Martin Wünsch 《无机化学与普通化学杂志》1992,611(5):35-42
The synfacial heterodinuclear μ-Cot complexes (Cot = cyclooctatetraene) [(CpCr) (CpM)]μ-Cot (Cp = cyclopentadienyl; M ? Fe, 3 ; M ? Co, 4 ) are formed in a thermal reaction of the mononuclear mixed sandwich compound CpCr(n6-Cot) and CpMLn [M ? Fe, Ln = benzene (Bz); M ? Co, Ln = (C2H4)2]. 3 possesses two unpaired electrons whereas 4 has only one unpaired electron and is ESR active. From the molecular structure of 3 and from the ESR data of 4 it can be deduced that the unpaired electrons are localized at the Cr centers predominantly forcing a close electronical relation between the heterodinuclear compounds 3 and 4 and the mononuclear sandwich complexes chromocene and CpCrBz, respectively. 相似文献
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