Distribution of fragments by mass in fission of U235. U238 and Pu239 by neutrons of 14.6 Mev energy

A study of the mass distribution of fission fragments provides a better understanding of the fission process for heavy nuclei. In addition, a knowledge of the relative yield of various fragments is necessary in some practical uses of radioactive isotopes.In this paper the method and results of measurements of the relative production of several fragments, formed in the fission of U²³⁵, U²³⁸ and Pu²³⁹ by neutrons with energy of 14.6 Mev, are given. By experimental and reflected points, curves are obtained for the distribution of fragments by masses. Some special features of this distribution are interpreted.     

Oliner models for quasioptical resonator to rectangular waveguide coupling elements

It has been shown that Oliner models, traditionally used for the analysis of microwave integrated circuits, can be applied to the calculation of electrodynamic characteristics of elements for coupling open resonators with rectangular waveguides. The experiments have indicated a high accuracy with the calculation technique developed.<>     

Cisco solutions for Russian Metallurgical Plants

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Cisco solutions for Russian Metallurgical Plants     

Nearshore benthic blooms of filamentous green algae in Lake Baikal

For the first time, species of the genus Spirogyra, non-typical of the open nearshore waters of Lake Baikal, formed algal mats with Ulothrix zonata, Ulothrix tenerrima, and Ulothrix tenuissima near the village of Listvyanka, Russia. Normally widely distributed in the 0- to 1.5-m depth range, the growth of U. zonata was now evident and dominant (63% of the biomass) in the 2- to 5-m depth range. The overgrowth of the lake bottom by filamentous green algae, changes in distributional boundaries, the emergence and mass development of species of the genus Spirogyra, the presence of the eutrophic diatom indicator Fragilaria capucina var. vaucheriae, elevated abundances of coliform bacteria, and elevated levels of nutrients suggest an early stage of cultural eutrophication in the nearshore of Lake Baikal near Listvyanka, a popular tourist destination. The unusual abundance of Fragilaria associated with the filamentous green algae consisted of long-ribbon colonies of F. capucina var. vaucheriae, a eutrophic species, wound around the filamentous green algae, enhancing the dense algae mats. Historically dominant species, such as Didymosphenia geminata, Tetraspora cylindrica var. bullosa, and Draparnaldioides baicalensis typically observed at deeper depths of Lake Baikal, are now subdominants or minor species in the nearshore along the shoreline near Listvyanka.     

Effect of niobium on recrystallization of ultralowcarbon cold-rolled automobile sheet steel

Conclusions  

Study of Features of Phase Precipitation Formation,Structural State,and Properties of Ferritic Class Microalloyed Low-Carbon Steels

Metallurgist - Features of the formation of the structural state, phase precipitates, and properties for rolled product of complex V–Nb–Ti–Mo microalloyed lowcarbon steels of the...