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41.
42.
M. I. Adamovich N. P. Andreeva E. S. Basova V. Bradnová V. I. Bubnov M. M. Chernyavsky A. S. Gaitinov K. G. Gulamov M. Haiduc D. Hasegan L. Just E. K. Kanygina S. P. Kharlamov A. D. Kovalenko S. A. Krasnov A. Kravcčáková V. G. Larionova I. A. Lebedev O. V. Levitskaya N. S. Lukicheva A. K. Musaeva S. Z. Nasyrov V. S. Navotny G. I. Orlova N. G. Peresadko L. N. Philippova V. A. Plyushchev V. V. Rusakova N. Saidkhanov N. A. Salmanova A. M. Seitimbetov M. I. Tretyakova T. P. Trofimova S. Vokál J. Vrláková P. I. Zarubin S. I. Zhokhova 《Physics of Atomic Nuclei》2004,67(2):273-280
Various flow phenomena observed by a unique emulsion method are reviewed. The experimental data of the emission of projectile and target fragments and relativistic particles in collisions of 1–160 A GeV/c 16O, 22Ne, 28Si, 32S, 84Kr, 197Au, and 208Pb nuclei with 108Ag (80Br) targets are investigated. The transverse-momentum approach, the flow-angle analysis using principal vectors, the azimuthal correlation functions, the method of azimuthal correlations between charged secondaries, and the method of Fourier expansion of the azimuthal angle distributions are applied. Evidence of the directed flow of spectators has been obtained in the medium-impact nuclear interactions. In azimuthal distributions, with respect to the reaction plane, the signal of the elliptic flow of participants has been observed. 相似文献
43.
R. R. Kattabekov K. Z. Mamatkulov D. A. Artemenkov V. Bradnova S. Vokál D. M. Zhomurodov P. I. Zarubin I. G. Zarubina Z. A. Igamkulov N. V. Kondratieva N. K. Kornegrutsa D. O. Krivenkov A. I. Malakhov G. I. Orlova N. G. Peresadko N. G. Polukhina P. A. Rukoyatkin V. V. Rusakova R. Stanoeva M. Haiduc S. P. Kharlamov 《Physics of Atomic Nuclei》2010,73(12):2110-2115
A nuclear track emulsion was exposed to a mixed beam of relativistic 12N, 10C, and 7Be nuclei having a momentum of 2 GeV/c per nucleon. The beam was formed upon charge exchange processes involving 12C primary nuclei and their fragmentation. An analysis indicates that 10C nuclei are dominant in the beam and that 12N nuclei are present in it. The charge topology of relativistic fragments in the coherent dissociation of these nuclei is presented. 相似文献
44.
D. A. Artemenkov V. Bradnova M. M. Chernyavsky L. A. Goncharova M. Haiduc N. A. Kachalova S. P. Kharlamov A. D. Kovalenko A. I. Malakhov A. A. Moiseenko G. I. Orlova N. G. Peresadko N. G. Polukhina P. A. Rukoyatkin V. V. Rusakova V. R. Sarkisyan R. Stanoeva T. V. Shchedrina S. Vokál A. Vokálová P. I. Zarubin I. G. Zarubina 《Physics of Atomic Nuclei》2008,71(9):1565-1571
The technique of nuclear track emulsions is used to explore the fragmentation of light relativistic nuclei down to the most
peripheral interactions: nuclear “white” stars. A complete pattern of the relativistic dissociation of a 8B nucleus with target
fragment accompaniment is presented. Relativistic dissociation 9Be → 2α is explored using significant statistics, and a relative contribution of 8Be decays from 0+ and 2+ states is established. Target fragment accompaniments are shown for relativistic fragmentation 14N → 3He +H and 22Ne → 5He. The leading role of the electromagnetic dissociation on heavy nuclei with respect to breakups on target protons
is demonstrated in all these cases. It is possible to conclude that the peripheral dissociation of relativistic nuclei in
nuclear track emulsion is a unique tool to study many-body systems composed of the lightest nuclei and nucleons in the energy
scale relevant for nuclear astrophysics.
The text was submitted by the authors in English. 相似文献
45.
Martin N. Gibbons D. Bryan Sowerby Christian Silvestru Ionel Haiduc 《Polyhedron》1996,15(24):4573-4578
Reactions between three diorganodithiophosphinates and diphenylantimony(V) bromide oxide (SbPh2OBr)2, led to antimony reduction while dithiophosphinate oxidation followed a complex path varying in detail with the nature of the organic groups on dithiophosphinate. Antimony(III) dithiophosphinates, SbPh2(S2PR2) where R = Me, Et and Ph, have been isolated and characterised and an X-ray structure determination for the methyl derivative shows weakly associated dimers in the solid state, intermediate between those in (SbPh2S2PPh2)2 and [Sb(4-MeC6H4)2S2PEt]2. 相似文献
46.
The paper reports a new, nonconventional method for the preparation of oxygen-containing niobium compounds, based upon coprecipitation. The coprecipitation product of niobic acid with lead oxalate was used as precursor. Lead metaniobate was obtained by proper thermal treatment of the coprecipitate. The coprecipitate mechanism was studied and the optimal conditions for quantitative precipitation of niobium and lead were established. The mechanism of thermal decomposition of the coprecipitate was investigated by differential thermal analysis and X-ray powder diagrams. The final product of thermal decomposition, lead metaniobate, is formed at 850°C. 相似文献
47.
Ionel Haiduc 《Journal of Coordination Chemistry》2019,72(1):35-52
This review is a follow up to a previous article [I. Haiduc J. Coord. Chem. (2018) doi:10.1080/00958972.2018.1515429.] which illustrated the concept of inverse coordination with structures in which the coordination center is nitrogen alone (mono- and poly-nitrogen moieties). Here the open and cyclic heteroatom molecules with inorganic skeletons and nitrogen donor sites are presented. Organic nitrogen heterocycles will be treated in a further review.
48.
The extraction of uranium(VI) with di-2-ethylhexyldithiophosphoric acid (HEhdtp) in benzene from aqueous solutions containing nitrate, chloride, sulfate and phosphate anions was investigated. The data obtained show hat the mechanism of extraction is similar to that established for perchlorate media. The inorganic anions present in the aqueous phase do not participate in the extraction process but affect the magnitude of the distribution ratio by the complexation phenomena which occur in the aqueous phase. In benzene the extracted species is a 12 complex of uranium(VI) with HEhdtp. 相似文献
49.
The paper presents a new, nonconventional method, based upon coprecipitation, for the synthesis of niobium oxidic compounds. The coprecipitation product of niobic acid with calcium oxalate was used as precursor. Calcium metaniobate was obtained by appropriate thermal treatment of the coprecipitate. The coprecipitation mechanism was studied and the optimal conditions for quantitative precipitation of niobium and calcium were established. The mechanism of thermal decomposition of the coprecipitate was investigated by means of differential thermal analysis and X-ray powder diagrams. The final product of thermal decomposition, calcium metaniobate, is formed at 730°C. 相似文献
50.
Munshi G Mustafa Sudhir Raniwala T Awes B Rai RS Bhalerao JG Contreras RV Gavai SK Ghosh P Jaikumar GC Mishra AP Mishra H Mishra B Mohanty J Nayak J-Y Ollitrault SC Phatak L Ramello R Ray PK Sahu AM Srivastava DK Srivastava VK Tiwari 《Pramana》2006,67(5):961-981
This is the report of Heavy Ion Physics and Quark-Gluon Plasma at WHEPP-09 which was part of Working Group-4. Discussion and
work on some aspects of quark-gluon plasma believed to have created in heavy-ion collisions and in early Universe are reported. 相似文献