The home-built pulse nuclear magnetic resonance spectrometer with digital quadrature detection for 3He research at low temperatures

The home-built pulse nuclear magnetic resonance spectrometer for 3He research is described. The temperature range is 1.5 - 4.2 K, the frequency range is 3 - 20 MHz, the dead time is 10 μs at 10 MHz. The spectrometer software is based on programming language LabVIEW. The advantages of digital technique are described; particularly the implementation of digital quadrature detector. © Kazan Federal University (KFU)

Experimental Setup for Observation the Bose-Einstein Condensation of Magnons in Solid Antiferromagnets CsMnF3 and MnCO3

The Bose-Einstein condensation of magnons was observed in 1984 in superfluid 3He-B. The same phenomena should exist in solid magnetic systems. We describe here a partly digital experimental setup for studying solid antiferromagnets CsMnF3 and MnCO3 by pulse and continuous wave nuclear magnetic resonance. With this equipment, the Bose-Einstein condensation of magnons was observed for the first time in these single crystals. © 2013 Springer-Verlag Wien

Size effect in the (PrF3 nanoparticles-3He) system

Spin kinetics of adsorbed and liquid 3He in contact with crystalline nanopowders of the Van Vleck paramagnet PrF3 at a temperature of 1.5 K has been studied by nuclear magnetic resonance. The correlation between the parameters of the nuclear magnetic relaxation of 3He and the sizes of the sample particles has been found. A qualitative model of the magnetic relaxation of 3He describing the experimental results has been proposed. © 2013 Pleiades Publishing, Ltd

Regulator constants and the parity conjecture

The p-parity conjecture for twists of elliptic curves relates multiplicities of Artin representations in p-infinity Selmer groups to root numbers. In this paper we prove this conjecture for a class of such twists. For example, if E/Q is semistable at 2 and 3, K/Q is abelian and K^\infty is its maximal pro-p extension, then the p-parity conjecture holds for twists of E by all orthogonal Artin representations of Gal(K^\infty/Q). We also give analogous results when K/Q is non-abelian, the base field is not Q and E is replaced by an abelian variety. The heart of the paper is a study of relations between permutation representations of finite groups, their "regulator constants", and compatibility between local root numbers and local Tamagawa numbers of abelian varieties in such relations.Comment: 50 pages; minor corrections; final version, to appear in Invent. Mat

СОВРЕМЕННЫЙ ПОДХОД К ПРОФИЛАКТИКЕ ПАРАЗИТАРНЫХ БОЛЕЗНЕЙ

It is offered sanitary-parasitological and veterinary-sanitary model of preventive maintenance of parasitic diseases of people and animals which approbation has resulted in the high effect expressing in reduction of number of cases of new infections in Bashkirija in 2,1 times.Предложена санитарно-паразитологическая и ветеринарно-санитарная модель профилактики паразитарных болезней человека и животных, апробация которой привела к высокому эффекту, выражающемуся в снижении числа случаев новых заражений в условиях Башкирского Зауралья в 2,1 раза

The home-built pulse nuclear magnetic resonance spectrometer with digital quadrature detection for 3He research at low temperatures

The home-built pulse nuclear magnetic resonance spectrometer for 3He research is described. The temperature range is 1.5 - 4.2 K, the frequency range is 3 - 20 MHz, the dead time is 10 μs at 10 MHz. The spectrometer software is based on programming language LabVIEW. The advantages of digital technique are described; particularly the implementation of digital quadrature detector. © Kazan Federal University (KFU)

The home-built pulse nuclear magnetic resonance spectrometer with digital quadrature detection for 3He research at low temperatures

The home-built pulse nuclear magnetic resonance spectrometer for 3He research is described. The temperature range is 1.5 - 4.2 K, the frequency range is 3 - 20 MHz, the dead time is 10 μs at 10 MHz. The spectrometer software is based on programming language LabVIEW. The advantages of digital technique are described; particularly the implementation of digital quadrature detector. © Kazan Federal University (KFU)