49 research outputs found
Singlet-to-triplet ratio in the deuteron breakup reaction at 585 MeV
Available experimental data on the exclusive reaction at 585 MeV
show a narrow peak in the proton-neutron final-state interaction region. It was
supposed previously, on the basis of a phenomenological analysis of the shape
of this peak, that the final spin-singlet state provided about one third
of the observed cross section. By comparing the absolute value of the measured
cross section with that of elastic scattering using the F\"aldt-Wilkin
extrapolation theorem, it is shown here that the data can be
explained mainly by the spin-triplet final state with a singlet admixture of a
few percent. The smallness of the singlet contribution is compatible with
existing data and the one-pion exchange mechanism of the reaction.Comment: 10 pages, Latex, 2 Postscript figure
The reaction at high momentum transfer and short-range NN properties
A recent cross section measurement of the deuteron breakup reaction , in the GeV region in a kinematics similar to
backward elastic scattering, strongly contradicts predictions of a model based on the one-nucleon exchange, single pN scattering and
excitation mechanisms, and on the wave functions of the Reid soft core and
Paris potentials. We show within the same model that for the CD Bonn
potential there is qualitative agreement with the data. It is attributed to a
reduction of the one-nucleon exchange at energies above 1 GeV and an increase
of the -isobar contribution, both related to the short-range
properties of the wave functions generated by this potential.Comment: 14 pages, Latex, 4 modified figure
The Effect of Gamma-Radiation on the Physicomechanical Properties of Glass-Fibre-Reinforced Plastics Based on Thermoplastic Matrices
Investigating the Effect of Polymeric Finishing Agents on the Physicomechanical Properties of Glass-Fibre-Reinforced Plastics Based on Thermoplastic Matrices
Evidences of existence of serotoninergic nerves, enhancing duodenal motility
The review is devoted to the mechanism of duodenal motility activation caused by sympathetic nerves. The authors have found that stimulation of the sympathetic trunk in the thoracic cavity in dogs in most cases provide not inhibitory but excitatory motor responses of the duodenum. Excitatory effects were eliminated during 5HT-receptors blockade by promedol and lysergol. Analysis of publications showed that sympathetic trunk contains serotoninergic fibers, providing excitatory motor responses of the duodenum to electrical nerve stimulation. According to histochemical and physiological studies, amount of serotonergic fibers in the sympathetic trunk is several times more than the adrenergic. This means that the body has sertoninergic nerves. Serotoninergic nerve as well as the sympathetic is a collective notion. There are: sympathetic trunks, their ramifications and branches that innervate the internal organs. Since promedol blocks serotonergic nerves, this is plausible cause of constipation in patients after surgical treatment along with the application of this drug
A search for neutrino–antineutrino mass inequality by means of sterile neutrino oscillometry
The investigation of the oscillation pattern induced by the sterile neutrinos might determine the oscillation
parameters, and at the same time, allow to probe CPT symmetry in the leptonic sector through neutrino–
antineutrino mass inequality. We propose to use a large scintillation detector like JUNO or LENA to detect
electron neutrinos and electron antineutrinos from MCi electron capture or beta decay sources. Our calculations
indicate that such an experiment is realistic and could be performed in parallel to the current research
plans for JUNO and RENO. Requiring at least 5σ confidence level and assuming the values of the oscillation
parameters indicated by the current global fit, we would be able to detect neutrino–antineutrino mass
inequality of the order of 0.5% or larger, which would imply a signal of CPT anomalies.peerReviewe
Evidences of existence of serotoninergic nerves, enhancing duodenal motility
The review is devoted to the mechanism of duodenal motility activation caused by sympathetic nerves. The authors have found that stimulation of the sympathetic trunk in the thoracic cavity in dogs in most cases provide not inhibitory but excitatory motor responses of the duodenum. Excitatory effects were eliminated during 5HT-receptors blockade by promedol and lysergol. Analysis of publications showed that sympathetic trunk contains serotoninergic fibers, providing excitatory motor responses of the duodenum to electrical nerve stimulation. According to histochemical and physiological studies, amount of serotonergic fibers in the sympathetic trunk is several times more than the adrenergic. This means that the body has sertoninergic nerves. Serotoninergic nerve as well as the sympathetic is a collective notion. There are: sympathetic trunks, their ramifications and branches that innervate the internal organs. Since promedol blocks serotonergic nerves, this is plausible cause of constipation in patients after surgical treatment along with the application of this drug
OD ESR signals of excess electrons in liquid hydrocarbons depending on the geminate recombination parameters, theory and experiment
The intensity of optically detected ESR (OD ESR) signals from radical-ion pairs in solution under ionizing irradiation has been investigated experimentally and theoretically as a function of the microwave power, the geminate recombination parameters, the diffusion coefficient, the distance distribution function of pairs, and the spin-lattice relaxation time. In line with theoritical predictions, the temperature dependence of an OD ESR signal has been shown to have a maximum depending on the microwave power. The experimental dependence has been measured for the system e- + triethylamine+ (TEA) in 3-methylpentane. Agreement between the theoretical and experimental dependences is discussed. © 1985