Hyperfine anomaly in Be isotopes in the cluster model and the neutron spatial distribution

The study of the hyperfine anomaly of neutron rich nuclei, in particular, neutron halo nuclei, can give a very specific and unique way to measure their neutron distribution and confirm a halo structure. The hyperfine structure anomaly in Be+ ions is calculated with a realistic electronic wave function, obtained as a solution of the Dirac equation. In the calculations, the Coulomb potential modified by the charge distribution of the clustered nucleus and three electrons in the 1s^2 2s configuration is used. The nuclear wave function is obtained in the core+nucleon model of 9,11Be. The aim of this study is to test whether the hyperfine structure anomaly reflects a halo structure in 11Be.Comment: 8 pages, 1 figur

Theoretical study of one-proton removal from 15O

One-proton removal from 15O at intermediate energies (56 A MeV) is studied in the eikonal approximation of the Glauber model. The production of the 14N core fragment in the ground and excited states is regarded. The calculated proton removal cross section, the 15O interaction cross section, and the longitudinal momentum distribution of the 14N fragments are compared to recent experimental data [1]. [1] H. Jeppesen, R. Kanungo, B. Abu-Ibrahim it et al, Nucl. Phys. A 739, 57 (2004)

Proximity effect as a probe of electronic correlations and exchange field in dirty ferromagnet/superconductor nanostructures

We investigate the interplay between the BCS and 2D Larkin-Ovchinnikov- Fulde-Ferrell (LOFF) states in the dirty thin ferromagnetic metal/superconductor (FM/S) nanostructures. For the FM/S bilayers we have derived the dependencies of critical temperature on the FM layer exchange field, electronic correlations and thickness. Moreover, in the corresponding FM/S/FM trilayers we predict two new n phase superconducting states with electron-electron repulsion in the FM layers. The 2D modulated LOFF states are possible in such trilayers only in presence of a weak magnetic field and at suitable parameters of the FM and S layers. On this base we originally propose the method of proximity effect probe the magnitude and sign of the electronic correlations, the order parameter symmetry and exchange fields in various FM layers

Proximity effect as a probe of electronic correlations and exchange field in dirty ferromagnet/superconductor nanostructures

© (2009) Trans Tech Publications, Switzerland. We investigate the interplay between the BCS and 2D Larkin-Ovchinnikov-Fulde-Ferrell (LOFF) states in the dirty thin ferromagnetic metal/superconductor (FM/S) nanostructures. For the FM/S bilayers we have derived the dependencies of critical temperature on the FM layer exchange field, electronic correlations and thickness. Moreover, in the corresponding FM/S/FM trilayers we predict two new π phase superconducting states with electron-electron repulsion in the FM layers. The 2D modulated LOFF states are possible in such trilayers only in presence of a weak magnetic field and at suitable parameters of the FM and S layers. On this base we originally propose the method of proximity effect probe the magnitude and sign of the electronic correlations, the order parameter symmetry and exchange fields in various FM layers

Physical and Mechanical Characteristics of Asphalt Concrete with Roofing Bitumen Chips

Секция I АРХИТЕКТУРА И СТРОИТЕЛЬСТВОУстановлено влияние кровельной битумной крошки на физико-механические свойства асфальтобетонов марки ПДг-III/2,0 и ЩМБг 20-III/2,0. Определено оптимальное соотношение битумной крошки в комплексном вяжущем на основе битума БНД 70/100. Показано, что асфальтобетон ПДг–III/2,0 с кровельной битумной крошкой в составе битумного вяжущего имеет показатель водонасыщения ниже на 0,21%, предел прочности при сдвиге выше на 5,1 %, предел прочности при сжатии выше на 18,4% по сравнению с показателями физико-механических свойств асфальтобетона марки ПДг-ΙIΙ/2,0 на битумном вяжущем.=The effect of roofing bitumen chips on the physical and mechanical properties of asphalt con-crete of PDg-III/2,0 and SHMBg 20-III/2,0 has been established. The optimal ratio of bitumen chips in a complex binder based on BND 70/100 bitumen has been determined. It is shown that asphalt concrete PDg-III/2,0 with roofing bitumen chips as part of a bituminous binder has a water saturation index lower by 0,21%, shear strength is higher by 5,1%, compressive strength is higher by 18,4% compared with the indicators of physical and mechanical proper-ties of asphalt concrete grade PDg-III/2,0 on a bitumen binder

Exposure of Nuclear Track Emulsion to a Mixed Beam of Relativistic 12^{12}N, 10^{10}C, and 7^7Be Nuclei

A nuclear track emulsion was exposed to a mixed beam of relativistic $^{12}$N, $^{10}$C, and $^7$Be nuclei having a momentum of 2 GeV/$c$ per nucleon. The beam was formed upon charge exchange processes involving $^{12}$C primary nuclei and their fragmentation. An analysis indicates that $^{10}$C nuclei are dominant in the beam and that $^{12}$N nuclei are present in it. The charge topology of relativistic fragments in the coherent dissociation of these nuclei is presented.Comment: ISSN 1063-7788, Pleiades Publishing, Ltd., 201

МЕТОДИЧЕСКИЙ ПОДХОД К ФОРМИРОВАНИЮ РУБРИКАТОРОВ-ПЕРЕХОДНИКОВ ДЛЯ АНАЛИЗА НАПРАВЛЕНИЙ WEB OF SCIENCE И SCOPUS В РАЗРЕЗЕ ПРИОРИТЕТОВ СТРАТЕГИИ НАУЧНО-ТЕХНОЛОГИЧЕСКОГО РАЗВИТИЯ РФ

The article describes a methodical approach to the development of Web of Science and Scopus rubricators-adapter in the system of priorities of the Strategy of scientific and technological development of the Russian Federation. The relevance of this problem is due to the need for statistical and dynamic retrospective, prospective and bidirectional studies. The article presents the description of the hierarchical Web of Science and Scopus categories structures and their classification codes. Revealed the difficulty of categories correlating among themselves and in the system of priorities SSTD. The principles of categories-adapters formation in the priorities SSTD context. Article is presented the algorithm of rubricators-adapters Web of Science and Scopus formation in the system of SSTD priorities. The algorithm of number scientific articles distribution on scientific categories in system of SNTR priorities by grouping method is presented. A comparative analysis of Russian Federation scientific categories and the world in the number of scientific articles indexed in the Web of Science or Scopus, in the system of SSTD priorities.В статье описывается методический подход к разработке рубрикаторов-переходников Web of Science и Scopus в системе приоритетов Стратегии научно-технологического развития Российской Федерации. Актуальность данной задачи обусловлена необходимостью проведения статистических и динамических ретроспективных, проспективных и двунаправленных исследований. В статье дано описание иерархических структур рубрикаторов Web of Science и Scopus и их классификационных кодов. Выявлены сложности соотнесения рубрикаторов между собой и в системе приоритетов СНТР. Определены принципы формирования рубрикаторов-переходников в разрезе приоритетов СНТР. Представлен алгоритм формирования рубрикаторов-переходников Web of Science и Scopus в системе приоритетов СНТР. Представлен алгоритм распределения числа научных статей по научным категориям в системе приоритетов СНТР методом группировки. Проведен сравнительный анализ научных категорий Российской Федерации и в мире по числу научных статей, индексируемых в Web of Science и Scopus, в системе приоритетов СНТР

The 6^{6}H states studied in the d(8He,α)d(^8\text{He},\alpha) reaction and evidence of extremely correlated character of the 5^{5}H ground state

The extremely neutron-rich system $^{6}$H was studied in the direct $^2\text{H}(^8\text{He},{^4\text{He}})^{6}$H transfer reaction with a 26 $A$ MeV secondary $^{8}$He beam. The measured missing mass spectrum shows a resonant state in $^{6}$H at $6.8(3)$ MeV relative to the $^3$H+$3n$ threshold. The population cross section of the presumably $p$-wave states in the energy range from 4 to 8 MeV is $d\sigma/d\Omega_{\text{c.m.}} \simeq 190(40)$ $\mu$b/sr in the angular range $5^{\circ}<\theta_{\text{c.m.}}<16^{\circ}$. The obtained missing mass spectrum is free of the $^{6}$H events below 3.5 MeV ($d\sigma/d\Omega_{\text{c.m.}} \lesssim 3$ $\mu$b/sr in the same angular range). The steep rise of the $^{6}$H missing mass spectrum at 3 MeV allows to show that $4.5(3)$ MeV is the lower limit for the possible resonant state energy in $^{6}$H tolerated by our data. According to paring energy estimates, such a $4.5(3)$ MeV resonance is a realistic candidate for the $^{6}$H ground state (g.s.). The obtained results confirm that the decay mechanism of the $^{7}$H g.s.\ (located at 2.2 MeV above the $^{3}$H+$4n$ threshold) is the ``true'' (or simultaneous) $4n$ emission. The resonance energy profiles and the momentum distributions of the sequential $^{6}$H \,\rightarrow \, ^5H(g.s.)+n\, \rightarrow \, ^3H+$3n$ decay fragments were analyzed by the theoretically-updated direct four-body-decay and sequential-emission mechanisms. The measured momentum distributions of the $^{3}$H fragments in the $^{6}$H rest frame indicate very strong ``dineutron-type'' correlations in the $^{5}$H ground state decay.Comment: 9 pages, 11 figure

Coulomb breakup of 17Ne from the viewpoint of nuclear astrophysics

By the Coulomb breakup of 17Ne, the time-reversed reaction 15O(2p,γ)17Ne has been studied. This reaction might play an important role in the rp process, as a break-out reaction of the hot CNO cycle. The secondary 17Ne ion beam with an energy of 500 MeV/nucleon has been dissociated in a Pb target. The reaction products have been detected with the LAND-R3B experimental setup at GSI. The preliminary differential and integral Coulomb dissociation cross section sCoul has been determined, which then will be converted into a photo-absorption cross section sphoto, and a two-proton radiative capture cross section σcap. Additionally, information about the structure of the 17Ne, a potential two-proton halo nucleus, will be received. The analysis is in progress. \ua9 Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence

Regulation of Cyclooxygenase-2 Expression by Heat: A Novel Aspect of Heat Shock Factor 1 Function in Human Cells

The heat-shock response, a fundamental defense mechanism against proteotoxic stress, is regulated by a family of heat-shock transcription factors (HSF). In humans HSF1 is considered the central regulator of heat-induced transcriptional responses. The main targets for HSF1 are specific promoter elements (HSE) located upstream of heat-shock genes encoding cytoprotective heat-shock proteins (HSP) with chaperone function. In addition to its cytoprotective function, HSF1 was recently hypothesized to play a more complex role, regulating the expression of non-HSP genes; however, the non-canonical role of HSF1 is still poorly understood. Herein we report that heat-stress promotes the expression of cyclooxygenase-2 (COX-2), a key regulator of inflammation controlling prostanoid and thromboxane synthesis, resulting in the production of high levels of prostaglandin-E2 in human cells. We show that heat-induced COX-2 expression is regulated at the transcriptional level via HSF1-mediated signaling and identify, by in-vitro reporter gene activity assay and deletion-mutant constructs analysis, the COX-2 heat-responsive promoter region and a new distal cis-acting HSE located at position −2495 from the transcription start site. As shown by ChIP analysis, HSF1 is recruited to the COX-2 promoter rapidly after heat treatment; by using shRNA-mediated HSF1 suppression and HSE-deletion from the COX-2 promoter, we demonstrate that HSF1 plays a central role in the transcriptional control of COX-2 by heat. Finally, COX-2 transcription is also induced at febrile temperatures in endothelial cells, suggesting that HSF1-dependent COX-2 expression could contribute to increasing blood prostaglandin levels during fever. The results identify COX-2 as a human non-classical heat-responsive gene, unveiling a new aspect of HSF1 function