排序方式: 共有33条查询结果,搜索用时 15 毫秒
1.
N. A. Nechitailo M. A. Dzyubina V. D. Tyurin A. N. Muratov A. Ya. Sideridu A. I. Nekhaev 《Russian Chemical Bulletin》1987,36(3):598-600
Conclusion The thermal decomposition of [FeCp(SR)CO]2 complexes, where B is Et or Ph, leads to ferrocene and a mononuclear complex, FeCpSE(SO)2. Stable polynuclear complexes are not formed.Deceased.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 655–657, March, 1987. 相似文献
2.
E.M. Akulonok V.Ya. Khaimov-Malkov Yu.K. Danileiko A.A. Manenkov V.S. Nechitailo T.P. Lebedeva 《Journal of solid state chemistry》1978,26(1):17-25
A problem of trap diffusion, that is diffusion of point defects in crystals participating in a solid-phase chemical reaction with motionless impurity ions, is solved. Time dependences of the reaction-front displacement, Xf, and its steepness, are determined analytically for N0 ? C0 and numerically for all relations of N0 and C0where C0 and N0 are the initial concentration of impurity and the eqilibrium defect concentration, respectively, D is a diffusion coefficient, and g is a chemical reaction constant. Dependence of Xf vs C0 and t is confirmed for oxygen annealing of corundum crystals doped with titanium which, reacting with the point defects, changes its valency. The data are obtained for dependence of displacement Xf upon partial oxygen pressure and thermotreatment temperature as well as upon the sign of the constant electric field applied to the sample. From these data we conclude that the reaction of titanium impurity, changing from the three-valent to the tetravalent state at the activation energy of 80 ± 8.5 kcal/mole is due to anisotropic diffusion of charged aluminum vacancy and holes in the valence band. The diffusion coefficient for that process at 1500°C is estimated to be larger than 10?5 cm2/sec. Using the trap-diffusion features, the concentration of optical centers of the 0.315-μm absorption band in ruby is also estimated. 相似文献
3.
I. M. Dremin A. V. Leonidov V. A. Nechitailo 《Bulletin of the Lebedev Physics Institute》2011,38(10):287-290
By the example of the asymptotically free theory λϕ
63 with random constant λ, the process of cascade multiplication of particles with random intensity of elementary decay is considered. The dependence
of the characteristics of the cascade particle multiplicity distribution on the parameters of the probabilistic distribution
over the elementary decay intensity is studied. 相似文献
4.
Petrov Al. A. Sergienko S. R. Tsedilina A. L. Sanin P. I. Nikitskaya E. A. Nechitailo N. A. 《Russian Chemical Bulletin》1960,9(10):1718-1726
Russian Chemical Bulletin - 相似文献
5.
Yu. K. Danileiko A. A. Manenkov V. S. Nechitailo 《Journal of Russian Laser Research》1980,1(3):210-247
Laser-induced depth damage to sapphire crystals and to various glasses is investigated. The influence of self-focusing on the laser damage process is studied. The conditions under which self-focusing influences the damage are clarified. The influence of various impurities on the optical endurance of ruby laser crystals is determined. The damage mechanism is initiated by various types of absorbing inclusions and defects; a correlation is found between the light scattering and the damage threshold. A new criterion based on light scattering is introduced for the purity of transparent dielectrics.Translated from Trudy Ordena Lenina Fizicheskogo Instituta im. P. N. Lebedeva, Vol. 101, pp. 31–74, 1978. 相似文献
6.
EP Sheretov VS Gurov MV Dubkov OV Korneeva 《Rapid communications in mass spectrometry : RCM》1999,13(16):1699-1702
In this article we compare the classical monopole mass filter of von Zahn and the monopole mass filter with a hyperbolic V-shaped electrode. The experimental results and those of computer simulation for both mass spectrometers are presented. We show that the replacement of a conventional 90 degrees V-shaped electrode by an electrode with a hyperbolic profile substantially improves the peak shape of any given mass, and increases the mass resolution by a factor of 3-4 and the abundance sensitivity by a factor of 100. The potential of high analytical performance combined with electroforming techniques for electrode manufacture indicate future practical uses of such instruments. Copyright 1999 John Wiley & Sons, Ltd. 相似文献
7.
The discovery of neutron rich isotopes of the lightest elements on the neutron drip line exhibiting a halo structure has opened
up new vistas in research activities. The novel structural features associated with the halo phenomena have been the subject
for extensive theoretical and experimental investigations in recent times. In this talk, I propose to present a broad overview
of the recent developments in this field, bringing out the striking features which show that a large number oflight nuclei
near the neutron drip line are characterized by a clear separation between a ‘normal’ core nucleus and a loosely bound low
density veil of neutrons. Specifically, the two neutron halos offer a natural premises, from a theoretical standpoint, to
employ three body techniques for studying their detailed structural properties. A considerable part of the talk will be devoted
to report and highlight the results on a number of light halo nuclei such as 11Li, 11Be, 19B and 22C on which we have been carrying out investigations employing a simple but realistic three body model. These three body systems
which have been termed as ‘Borromean’ (i.e while three body systems are bound, the corresponding binary subsystems on the
other hand are unbound) are characterized by large spacial extension and very low separation energy of the neutron. They are,
therefore, ideally suited for exploring the possibility of the existence of Efimov states in two neutron halo nuclei. We have
recently carried out the three body analyses to predict the possibility of the occurrence of such states on which experimental
work at various laboratories is underway. 相似文献
8.
Michael Ph. Pyshnyi Svetlana V. Pyshnaya Galina S. Nechitailo Anatoly A. Kuznetsov 《Journal of magnetism and magnetic materials》2009,321(10):1552-1556
We considered applicability of acoustic imaging technology for the detection of magnetic microparticles and nanoparticles inside soft biological tissues. Such particles are widely used for magnetically targeted drug delivery and magnetic hyperthermia. We developed a new method of ultrasonic synchronous tissue Doppler imaging with magnetic modulation for in vitro and in vivo detection and visualization of magnetic ultradisperse objects in soft tissues. Prototype hardware with appropriate software was produced and the method was successfully tested on magnetic microparticles injected into an excised pig liver. 相似文献
9.
10.
A. Capella I.M. Dremin V.A. Nechitailo J. Tran Thanh Van 《Zeitschrift fur Physik C Particles and Fields》1997,75(1):89-94
Moment analysis of global multiplicity distributions previously done for e + e ? and hh processes is applied to hA and AA collisions. Oscillations of cumulants as functions of their rank are found in all processes for which experimental data are available. A similar oscillation pattern is found in the dual parton model and quark-gluon string models but not in the phenomenological fits such as modified negative binomial distributions. The zeros of the truncated generating function move closer and closer to the unity circle in the complex z-plane when the complexity of the collision increases. 相似文献