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21.
G. L. Bochek V. K. Voloshin O. S. Deiev N. I. Maslov 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2013,7(2):339-346
The interaction between X-ray radiation and the material of secondary targets is simulated using GEANT4 for two methods of measurements of intense X-ray spectra. In the first case, characteristic X-ray radiation (CXR) from the secondary target to the back hemisphere is detected; in the second case, primary radiation passing through pairs of foils (a Ross filter) is registered. Using Ross filters and the CXR technique, the primary spectra of X-ray radiation are recovered. Two methods for recovery primary radiation spectra are compared. 相似文献
22.
23.
Belyaev B. A. Tyurnev V. V. Voloshin A. S. Leksikov An. A. Galeev R. G. Shabanov V. F. 《Doklady Physics》2020,65(9):343-348
Doklady Physics - The design of a multilayer bandpass filter has been investigated, in which each of the half-wavelength resonators consists of two dielectric layers with outer strip conductor... 相似文献
24.
N. N. Medvedev V. P. Voloshin A. V. Kim A. V. Anikeenko A. Geiger 《Journal of Structural Chemistry》2013,54(2):271-288
This paper is a review of our recent computational studies of volumetric characteristics using computer models of dilute solutions. Partial molar volume (PMV) and its components are calculated for simple and complex molecules in water (methane, noble gases, surfactants, polypeptides). Advantages and disadvantages of various computational methods are discussed. It is proposed to use the Voronoi-Delaunay technique to determine the reasonable boundary between a solute molecule and solvent molecules and to identify the PMV components related to the molecule, the boundary layer, and the solvent. It is noted that the observed increase in PMV with temperature for large molecules is due to an increase in the volume of voids in the boundary layer, i.e., due to the “thermal volume.” In this case, the solvent gives a negative contribution to the PMV. In contrast, for simple molecules (methane), the contribution from the solvent is positive and is the main factor in the increase in the PMV, which is associated with a specific change in water structure around a spherical hydrophobic particle outside the boundary layer. For surfactant molecules, the contribution from the solvent changes sign (from negative to positive) with increasing temperature. 相似文献
25.
A. Akindinov A. Alici P. Antonioli S. Arcelli M. Basile G. Cara Romeo M. Chumakov L. Cifarelli F. Cindolo A. De Caro D. De Gruttola S. De Pasquale M. Fusco Girard C. Guarnaccia D. Hatzifotiadou H.T. Jung W.W. Jung D.W. Kim H.N. Kim J.S. Kim S. Kiselev G. Laurenti K. Lee S.C. Lee E. Lioublev M.L. Luvisetto A. Margotti A. Martemiyanov R. Nania F. Noferini P. Pagano A. Pesci R. Preghenella G. Russo E. Scapparone G. Scioli R. Silvestri Y. Sun I. Vetlitskiy K. Voloshin L. Vorobiev M.C.S. Williams B. Zagreev C. Zampolli A. Zichichi 《The European Physical Journal C - Particles and Fields》2007,50(2):341-352
In this work we explore the possibility to perform “effective energy” studies in very high energy collisions at the CERN large
hadron collider (LHC). In particular, we focus on the possibility to measure in pp collisions the average charged multiplicity
as a function of the effective energy with the ALICE experiment, using its capability to measure the energy of the leading
baryons with the zero degree calorimeters. Analyses of this kind have been done at lower centre-of-mass energies and have
shown that, once the appropriate kinematic variables are chosen, particle production is characterized by universal properties:
no matter the nature of the interacting particles, the final states have identical features. Assuming that this universality
picture can be extended to ion–ion collisions, as suggested by recent results from RHIC experiments, a novel approach based on the scaling hypothesis for limiting
fragmentation has been used to derive the expected charged event multiplicity in AA interactions at LHC. This leads to scenarios
where the multiplicity is significantly lower compared to most of the predictions from the models currently used to describe
high energy AA collisions. A mean charged multiplicity of about 1000–2000 per rapidity unit (at η∼0) is expected for the most
central Pb–Pb collisions at .
In memory of A. Smirnitskiy 相似文献
26.
A. Akindinov A. Alici P. Antonioli S. Arcelli M. Basile F. Bellini D. Caffarri G. Cara Romeo L. Cifarelli F. Cindolo A. De Caro D. De Gruttola S. De Pasquale K. Doroud M. Fusco Girard B. Guerzoni D. Hatzifotiadou W. W. Jung D. W. Kim J. S. Kim S. Kiselev G. Laurenti K. Lee S. C. Lee D. Malkevich A. Margotti R. Nania A. Nedosekin F. Noferini P. Pagano A. Pesci O. Pinazza R. Preghenella M. Ryabinin E. Scapparone G. Scioli J. Seo A. Silenzi K. Voloshin M. C. S. Williams C. Zampolli A. Zichichi 《The European Physical Journal C - Particles and Fields》2010,68(3-4):601-607
The Time-Of-Flight detector (TOF) of the ALICE experiment at the CERN LHC is based on Multi-gap Resistive Plate Chambers (MRPCs). The TOF detector consists of 152928 readout channels covering a total area of 141 m2. In this paper the results of the calibration with cosmic-ray data collected during 2009 are presented. 相似文献
27.
V. A. Antipin A. I. Voloshin S. S. Ostakhov Y. P. Kazakov 《Russian Chemical Bulletin》1996,45(5):1099-1102
Luminescence accompanying an impact mechanical treatment of solid particles of the complex of Eu(fod)3 (fod is 1,1,1,2,2,3,3-heptafluoro-7,7-dimethyloctane-4,6-dione) with dispiro(adamantane-1,2-dioxetane) (1) was discovered and studied. The luminescence has a complex structure, and its spectrum belongs to the excited EuIII ions. The emission of light is observed only in a mechanical mixture of the Eu(fod)3 with dioxetane1 and in their cocrystallized form, but not in the case of the components taken separately. The mechanism by which the impacts cause the luminescence is considered. It was shown that the luminescence is not triboluminescence, but is chemiluminescence induced by the decomposition of compound1.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 1159–1162, May, 1996. 相似文献
28.
A. D. Karavaev A. I. Voloshin V. P. Kazakov 《Theoretical and Experimental Chemistry》1989,25(2):174-179
It has been shown that the red chemiluminescence (CL) in the Belousov-Zhabotinskii system with Mn(II, III) cannot be attributed to the formation of excited oxygen or its dimers during the process. Chemiluminescence has been discovered upon the reduction of Mn(III) by malonic acid, and its spectrum coincides with the spectrum of the CL in the oscillatory system (with a maximum at 680–720 nm) and is found in the same region as the photoluminescence of Mn(II),- which is known from the literature data. It has been concluded that the principal emitter of the oscillatory CL is Mn(II), which is formed in an excited state upon the reduction of Mn(III).Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 25, No. 2, pp. 191–197, March–April, 1989. 相似文献
29.
V. A. Lokshin N. S. Trofimova N. A. Voloshin Yu. V. Revinskii N. E. Shelepin Kh. A. Kurdanov V. I. Minkin 《Chemistry of Heterocyclic Compounds》1980,16(1):38-41
The preparation of 1,3-dithiolanium salts from 1,2-ethanedithiol and carboxylic acid chlorides, the subsequent condensation of which with aromatic o-hydroxy aldehydes leads to spiropyrans of the dithiolane series, is described. The PMR spectra were studied, and the photochromic properties are discussed.See [1] for Communication 9.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 47–50, January, 1980. 相似文献
30.
[reaction: see text] The title technique is a convenient and powerful method for directly monitoring or assaying any reaction mixture or reagent solution. Examples of some common processes (Fischer esterification, lithiation, butyllithium/THF compatibility, olefin metathesis, and a quantification assay), each interrogated in its native solvent, are presented. The spectral data are easy to acquire, and the information content makes a compelling case for routine use of No-D NMR spectroscopy. 相似文献