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101.
102.
An optical study of a Y0.99Pr0.01PO4 single crystal is presented. Measurements of optical absorption, excitation, and emission by selective excitation into 1D2, 3P0 and 3P1, at different temperatures between 20 and 295 K, are described. A detailed account of the line assignments is given for absorption in the 4300-23 000 cm−1 spectral range, and for emission in the 6400-23 000 cm−1 range. The lifetimes of the emitting levels are determined. Vibronic sidebands accompanying absorption, emission and excitation spectra are reported. The decay processes of the 3P1, 3P0 and 1D2 levels are discussed. The aim of this study is a test of the configuration-interaction-assisted crystal field analysis as well as the accurate experimental determination of the energy level scheme. It was reported previously that the introduction of configuration interaction between the ground 4f2 configuration with the excited 4f6p configuration always resulted in a decrease (≈50-60%) in the standard deviations between the observed and calculated energy levels. In the present work the 4f5d configuration is included as well. The crystal field is analysed in the theoretical D2d site symmetry with and without configuration interaction. The results with 4f2, 4f2+4f5d, 4f2+4f6p and 4f2+4f5d+4f6p are given. The calculation on the basis of the 315 (4f2+4f5d+4f6p) levels gives the best overall standard deviation lowering it by 75% with regard to the calculation on the 91 4f2 levels only. 相似文献
103.
Evdokimov AV Akgun U Alkhazov G Amaro-Reyes J Atamantchouk AG Ayan AS Balatz MY Bondar NF Cooper PS Dauwe LJ Davidenko GV Dersch U Dolgolenko AG Dzyubenko GB Edelstein R Emediato L Endler AM Engelfried J Eschrich I Escobar CO Filimonov IS Garcia FG Gaspero M Giller I Golovtsov VL Gouffon P Gülmez E Kangling H Iori M Jun SY Kaya M Kilmer J Kim VT Kochenda LM Konorov I Kozhevnikov AP Krivshich AG Krüger H Kubantsev MA Kubarovsky VP Kulyavtsev AI Kuropatkin NP Kurshetsov VF Kushnirenko A Kwan S 《Physical review letters》2004,93(24):242001
We report the first observation of a charm-strange meson D(+)(sJ)(2632) at a mass of 2632.5+/-1.7 MeV/c(2) in data from SELEX, the charm hadro-production experiment E781 at Fermilab. This state is seen in two decay modes, D(+)(s)eta and D0K+. In the D(+)(s)eta decay mode we observe a peak with 101 events over a combinatoric background of 54.9 events at a mass of 2635.4+/-3.3 MeV/c(2). There is a corresponding peak of 21 events over a background of 6.9 at 2631.5+/-2.0 MeV/c(2) in the decay mode D0K+. The decay width of this state is <17 MeV/c(2) at 90% confidence level. The relative branching ratio Gamma(D0K+)/Gamma(D(+)(s)eta) is 0.14+/-0.06. The mechanism that keeps this state narrow is unclear. Its decay pattern is also unusual, being dominated by the D(+)(s)eta decay mode. 相似文献
104.
V. M. Edelstein 《JETP Letters》2003,77(4):182-186
The electric field within the double electric layer that occurs when two conductors with different work functions come into contact induces interface spin-orbit coupling. In the case of contact of a conventional, s-wave superconductor with a ferromagnetic metal, the coupling is predicted to give rise to the appearance of triplet superconductivity on both sides of the interface. The form of the triplet component of the condensation amplitude is determined, and the ability of the triplet superconductivity to penetrate into the ferromagnet on the usual coherence length is shown. 相似文献
105.
106.
107.
Farthest points of sets in uniformly convex banach spaces 总被引:4,自引:0,他引:4
Michael Edelstein 《Israel Journal of Mathematics》1966,4(3):171-176
LetS be a closed and bounded set in a uniformly convex Banach spaceX. It is shown that the set of all points inX which have a farthest point inS is dense. Letb(S) denote the set of all farthest points ofS, then a sufficient condition for
to hold is thatX have the following property (I): Every closed and bounded convex set is the intersection of a family of closed balls. 相似文献
108.
M. Edelstein 《Israel Journal of Mathematics》1969,7(1):90-94
LetA be a finite nonempty family of nonempty disjoint closed and bounded sets in a Banach spaceE which is either separable and the conjugate of some Banach spaceX (i.e.E=X*) or, reflexive and locally uniformly convex. IfC denotes the weak*-closed convex hull of ∪ {A:A ∈A} then the set of points inE ∼C through which there is no hyperplane intersecting exactly one member ofA is discrete (or empty).
This research was supported by the National Research Council of Canada, Grant A-3999. 相似文献
109.
110.
Ricardo Couso-Santamaría José D. Edelstein Ricardo Schiappa Marcel Vonk 《Annales Henri Poincare》2016,17(2):331-399
The gauge theoretic large N expansion yields an asymptotic series which requires a nonperturbative completion to be well defined. Recently, within the context of random matrix models, it was shown how to build resurgent transseries solutions encoding the full nonperturbative information beyond the ’t Hooft genus expansion. On the other hand, via large N duality, random matrix models may be holographically described by B-model closed topological strings in local Calabi–Yau geometries. This raises the question of constructing the corresponding holographically dual resurgent transseries, tantamount to nonperturbative topological string theory. This paper addresses this point by showing how to construct resurgent transseries solutions to the holomorphic anomaly equations. These solutions are built upon (generalized) multi-instanton sectors, where the instanton actions are holomorphic. The asymptotic expansions around the multi-instanton sectors have both holomorphic and anti-holomorphic dependence, may allow for resonance, and their structure is completely fixed by the holomorphic anomaly equations in terms of specific polynomials multiplied by exponential factors and up to the holomorphic ambiguities—which generalizes the known perturbative structure to the full transseries. In particular, the anti-holomorphic dependence has a somewhat universal character. Furthermore, in the non-perturbative sectors, holomorphic ambiguities may be fixed at conifold points. This construction shows the nonperturbative integrability of the holomorphic anomaly equations and sets the ground to start addressing large-order analysis and resurgent nonperturbative completions within closed topological string theory. 相似文献