Quasi-free scattering in 7(p,pd)5He and 12C(p,pd)10B reactions at 670 MeV

The reactions ⁷Li(p, pd)⁵He and ¹²C(p, pd)¹⁰ were investigated at 670 MeV in quasi-free scattering geometry at large angles. In transitions to low-lying as well as to highly excited states of the residual nuclei the energy distributions of the scattered protons are in agreement with the mechanism of quasi-free scattering on quasi-deuterons in the p- and s-shells of ⁷Li and ¹²C.     

Evolution of properties in composite carbon films under thermal conditions and in the presence of a catalyst

The characteristics of composite carbon films are experimentally studied. The films are synthesized under concurrent conditions of the magnetron and plasmatron sputtering of molybdenum disilicide and polyphenyl methylsiloxane (PPMS 2/5). Automodulation of the elemental and phase composition is found and studied in the direction of film deposition onto the substrate. The stability of the automodulation parameters to subsequent high-temperature annealing is examined.     

Investigating Thunderstorm Activity in Moscow Region Via Methods of Muonography

Physics of Atomic Nuclei - Using muon flux characteristics obtained by the URAGAN muon hodoscope, 235 thunderstorm event candidates were identified in 2014–2020, 211 of them were accompanied...     

Natural Deduction for Fitting’s Four-Valued Generalizations of Kleene’s Logics

In this paper, we present sound and complete natural deduction systems for Fitting’s four-valued generalizations of Kleene’s three-valued regular logics.     

A general treatment of solubility. 2. QSPR prediction of free energies of solvation of specified solutes in ranges of solvents

As part of our general QSPR treatment of solubility (started in the preceding paper), we now present quantitative relationships between solvent structures and the solvation free energies of individual solutes. Solvation free energies of 80 diverse organic solutes are each modeled in a range from 15 to 82 solvents using our CODESSA PRO software. Significant correlations (in terms of squared correlation coefficient) are found for all the 80 solutes: the best fit is obtained for n-propylamine (R(2) = 0.996); the lowest R(2) corresponds to toluene (0.604).     

EPR spectroscopic study of the spin-labeled chelating reagent-solvent-neutral electron-donor compound system

Conclusions Dimerization of spin-labeled hydroxamic acid (I) in aprotic solvents was demonstrated, and the dimerization constants in heptane, toluene, and chloroform were calculated. There is an indirect exchange reaction between the radicals at the bonds in the molecule of the dimer. The effect of the nature of the solvent on the HFI constants of nitroxyl radicals, imidazoline and imidazolidine derivatives, was studied. The distance between the unpaired electrons in the molecule of the dimer in a glassy toluene solution of the reagent was determined. Addition of neutral electron-donor compounds inhibits the dimerization of (I). The constants for the formation of molecular complexes of the reagent with triethylamine, piperidine, triphenylphosphine oxide, tri-n-butyl phosphate, dimethylsulfoxide, ethanol, and acetone were estimated. An increase in the basicity of the additive compounds results in an increase in the constants for the formation of molecular complexes.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 64–70, January, 1985.     

Investigating the energy, angular, and temporal characteristics of forbush effects registered by the URAGAN muon hodoscope

The results from analyzing variations in the flux of cosmic ray muons during Forbush effects (FEs) registered by the URAGAN muon hodoscope over the period 2005–2009 are presented. The dependences of the amplitudes for reductions in the intensity of the cosmic ray muon flux on the energy of primary particles in energy ranges higher than 10 GeV were obtained. Their changes upon different phases of Forbush effect development were investigated. The local anisotropy vectors were calculated on the basis of spatial-angular variations in the muon flux. Correlations between the parameters of physical properties in the near heloiosphere related to the Forbush effects and the characteristics of muon flux variations were analyzed.     

Investigation of geoeffective and non-geoeffective CMEs according to data from the URAGAN muon hodoscope

Coronal mass ejections are the brightest manifestations of solar activity. Dozens of coronal mass ejections are observed daily during periods of higher solar activity. They directly affect cosmic ray fluxes that carry information on plasma clouds, including clouds moving toward the Earth. Several aspects of geoeffective and non-geoeffective coronal mass ejections, observed with the ground-based URAGAN muon hodoscope operated as part of the NEVOD experimental complex at MEPhI, are discussed. The anisotropy of cosmic ray muon fluxes recorded during coronal mass ejections in 2014 and 2015 is investigated.     

Forbush decreases recorded by the URAGAN muon hodoscope in 2006–2011

Variations in the cosmic ray muon flux on Earth’s surface during Forbush decreases (FD) recorded by the URAGAN muon hodoscope in 2006–2011 are investigated. The dependence of the rate of amplitude reduction on the primary particle energy in a range above 10 GeV at different phases of FD development is studied by analyzing the variations in the cosmic ray muon flux recorded with the hodoscope. Analytical data on the spatial and angular dynamics of the muon flux are used to estimate variations in the spatial anisotropy of the muon flux during FDs.     

Energy spectrum of cosmic ray muons above 10 TeV according to BUST data

The energy spectrum of cosmic ray muons in the range of several TeV to PeV obtained through the analysis of multiple interactions of muons (the pair meter technique) in the Baksan Underground Scintillation Telescope (BUST) is presented. Results are compared with prior BUST data on the muon energy spectrum measurements and data of other experiments, along with calculations for different muon spectrum models.