32 research outputs found
Structural heterogeneity and diffuse scattering in morphotropic lead zirconate-titanate single crystals
Complementary diffuse and inelastic synchrotron X-ray scattering measurements
of lead zirconate-titanate single crystals with composition near the
morphotropic phase boundary (x=0.475) are reported. In the temperature range
293 K < T < 400 K a highly anisotropic quasielastic diffuse scattering is
observed. Above 400 K this scattering disappears. Its main features can be
reproduced by model of inhomogeneous lattice deformations caused by inclusions
of a tetragonal phase into a rhombohedral or monoclinic phase. This observation
supports the idea that PZT at its morphotropic phase boundary is essentially
structurally inhomogeneous.Comment: 4 pages, 4 figure
Search for the Cryptoexotic Member of the Baryon Antidecuplet 1/2+ in the Reactions pi- p --> pi- p and pi- p --> K L
The main goal of this proposal is the search for a narrow cryptoexotic
nucleon resonance by scanning of the pi- p system invariant mass in the region
(1610-1770) MeV with the detection of pi- p and K Lambda decays. The scan is
supposed to be done by the variation of the incident pi- momentum and its
measurement with the accuracy of up to +-0.1% (better than 1 MeV in terms of
the invariant mass in the whole energy range) with a set of proportional
chambers located in the first focus of the magnetooptical channel. High
sensitivity of the method to the resonance under search is shown. The secondary
particles scattered from a liquid hydrogen target are detected by sets of the
wire drift chambers equipped with modern electronics. The time scale of the
project is about 3 years. The budget estimate including manpower, the apparatus
and operation cost, is about 40 million rubles. The beam time required is (4-6)
two week runs on "high" (10 GeV/c) flattop of the ITEP proton synchrotron.Comment: 16 pages, 10 figures. v2: an acknowledge adde
The PHENIX Experiment at RHIC
The physics emphases of the PHENIX collaboration and the design and current
status of the PHENIX detector are discussed. The plan of the collaboration for
making the most effective use of the available luminosity in the first years of
RHIC operation is also presented.Comment: 5 pages, 1 figure. Further details of the PHENIX physics program
available at http://www.rhic.bnl.gov/phenix
Морфофункциональная характеристика печени после гемостаза неравновесной плазмой на отдаленные сроки в условиях эксперимента
Research of morphofunctional properties that indicate intensity of liver injury when performing cold plasma hemostasis. The operation is an atypical resection of liver left lobe with cold plasma hemostasis. It is performed on white rats. There are a biochemical blood analysis, histological study and MRI-scanning in late period. Morphofunctional changes on the 90th and 180th day are described in the issue.Изучены морфофункциональные параметры, отражающие выраженность повреждений печени при гемостазе неравновесной плазмой. Оперативное вмешательство заключалось в атипичной резекции левой доли печени с гемостазом холодной плазмой и выполнялось на белых крысах. В отдаленные сроки проводили биохимическое исследование крови, гистологическое исследование и магнитно-резонансную томографию. В результате описаны морфофункциональные изменения на 90-е и 180-е сут
Update on the Combined Analysis of Muon Measurements from Nine Air Shower Experiments
Over the last two decades, various experiments have measured muon densities in extensive air showers over several orders of magnitude in primary energy. While some experiments observed differences in the muon densities between simulated and experimentally measured air showers, others reported no discrepancies. We will present an update of the meta-analysis of muon measurements from nine air shower experiments, covering shower energies between a few PeV and tens of EeV and muon threshold energies from a few 100 MeV to about 10GeV. In order to compare measurements from different experiments, their energy scale was cross-calibrated and the experimental data has been compared using a universal reference scale based on air shower simulations. Above 10 PeV, we find a muon excess with respect to simulations for all hadronic interaction models, which is increasing with shower energy. For EPOS-LHC and QGSJet-II.04 the significance of the slope of the increase is analyzed in detail under different assumptions of the individual experimental uncertainties