Импульсное приближение в теории рассеяния нескольких заряженных частиц
Импульсное приближение в теории рассеяния нескольких заряженных частиц
В.В.Комаров$^1$, А.М. Попова$^1$, И.И. Назарьев$^2$, В.Л. Шаблов$^2$, Ю.Ю. Шитков$^2$
Предложено высокоэнергетическое приближение для описания процессов рассеяния нескольких заряженных частиц. Исходной моделью является импульсное приближение для волновой функции, которое в случае короткодействующих потенциалов эквивалентно симметричному эйкональному. Как пример, на основе полученных формул для дифференциального сечения процесса распада дейтрона в поле ядра рассчитаны энергетические распределения протонов из реакций взаимодействия дейтронов, имеющих энергию 56 МэВ, с ядрами $^{12}C$, $^{51}V$, $^{118}Sn$.
Show AbstractElectromagnetic radiation absorption and reaction rates in partially ionized plasma
Electromagnetic radiation absorption and reaction rates in partially ionized plasma
M.A. Drofa, L.S. Kuzmenkov, S.G. Maximov
The balance equations of particle number and momentum for systems with ionization and recombination of particles have been obtained. In the limit of low temperatures, for a hydrogen-like four-component system in an ionizing radiation field the dispersion relations have been found, which prove the existence of electromagnetic radiation absorption regions whose boundaries depend on the degree of ionization and elementary processes rates. Experimental determination of these boundaries may provide data on elementary processes rates.
Show AbstractA model for describing cross sections of photoneutron reactions on heavy weakly deformed nuclei
A model for describing cross sections of photoneutron reactions on heavy weakly deformed nuclei
S.S. Borodina, B.S. Ishkhanov, V.I. Mokeev
A method for describing cross sections of photo-neutron reactions on nuclei with mass numbers A > 80 has been developed. This method can be employed for solving problems of radioactive isotopes transmutation, as well as for numerous applied and fundamental studies, where the description of photoneutron cross sections is needed and no experimental data are available.
Show AbstractSlow induction of fluorescence of bean leaves on their treatment with $КН_{2} РО_{4}$ solutions
Slow induction of fluorescence of bean leaves on their treatment with $КН_{2} РО_{4}$ solutions
S.A. Dovyd'kov, V.A. Karavaev
The effect of $КН_2Р0_4$ solutions on the induction changes in bean leaf fluorescence has been studied using different methods of plant treatment: via the root system or by introducing the solutions into the leaf vein. It has been shown that irrespective of the method of treatment, the maximal changes in fluorescence induction occurred at a $10^{-5}- 10^{-4} М$ concentration of the $КН_2Р0_4$ solution. The dependence of the parameters of slow induction of fluorescence on time after phosphate treatment of the leaf has been studied. A positive correlation between relative fluorescence quenching in the course of slow induction and the stationary rate of photosynthesis has been established.
Show AbstractAbout possible origin of continual emission bands recorded in spectra of a plasma containing heavy inert gases doped with sulfur trioxide
About possible origin of continual emission bands recorded in spectra of a plasma containing heavy inert gases doped with sulfur trioxide
I.S. Lakoba$^1$, S.P. Chernov$^2$, P.B. Essel'bakh$^2$
Spectral continua with peaks of intensity near 350 and 248 nm, found in the radiation of plasma mixtures containing $SO_3 +Хе$ and $SO_3 + Kr$, respectively, are presumably attributed to transitions of exciplexes $XeSO_4^*$ and $KrSO_4^*$ from the lower Coulomb state to the ground state. Proceeding from this assumption, the electron affinity energy of the radical $SO_4$ is estimated to be $ЕА_{SO_4}\approx 4,5$ eV.
Show AbstractTemperature and concentration dependences of $Gd_{1-x}Zr_xCo_2$ exchange and zone magnetostriction
Temperature and concentration dependences of $Gd_{1-x}Zr_xCo_2$ exchange and zone magnetostriction
S.A. Nikitin, A.K. Kupriyanov, Z.S. Umhaeva
The results of an investigation into the magnetostriction properties of $Gd_{1-x}Zr_xCo_2$ intermetallic compounds as a function of zirconium concentration have been presented for magnetic fields strength of 13 kOe and in the temperature range from 77 to 360 K. Volume magnetostriction is shown to comprise the exchange and zone contributions. The temperature and concentration dependences of these contributions have been found. It has been shown that the obtained dependences of magnetostriction can be justified by significant changes in the d-zone structure.
Show AbstractThe role of protons in charging the semiconductor surface
The role of protons in charging the semiconductor surface
V.B. Zaitsev, V.F. Kiselev, D.I. Ol'shanskii, G.S. Plotnikov
Recharging exchange of surface states in the structures of $Ge-GeO_2$-adsorbed molecules of weak organic photoacids (naphthols) - was studied. As a result of adsorption or lighting, naphthol molecules can give away their protons and become anion-radicals. Naphthols manifested a strong influence on the parameters of all groups of slow surface states.
Show AbstractPhotoinduced effects in $\alpha Si:H$ films at elevated temperatures
Photoinduced effects in $\alpha Si:H$ films at elevated temperatures
I.A. Kurova, N.N. Ormont, D.V. Senashenko
The kinetics of dark conduction $(\sigma_d)$ in high-resistance $\alpha Si:H$ films during and after illumination at elevated temperatures (T > 120°C ) has been studied. It has been established that the $\sigma_d(t)$ value changes nonmonotonically: during illumination, it first decreases and then increases; after illumination, it first increases to a value larger than the equilibrium one and then slowly decreases to the equilibrium value. It has been shown that the time dependences of $\sigma_d(t)$ relaxation can be described by the sum of two extended exponents with different parameters $\tau$ and $\beta$. The nature of nonmonotone changes in $\sigma_d(t)$ is discussed.
Show AbstractAscending diffusion in hydrogen-saturated palladium-samarium alloys
Ascending diffusion in hydrogen-saturated palladium-samarium alloys
G.P. Revkevich, M.K. Mitkova, A.A. Katsnel'son
Changes in the X-ray diffraction for a Pd-4.5 at.% Sm hydrogen-saturated alloy have been studied. Ascending diffusion in samarium atoms has been observed, which is caused by a chemical affinity stronger for hydrogen than for palladium.
Show AbstractInteraction of wind waves with the atmosphere and the field of surface heterogeneities in the coastal zone
Interaction of wind waves with the atmosphere and the field of surface heterogeneities in the coastal zone
E.P. Anisimova, V.L. Lebedev, K.V. Pokazeev, A.A. Speranskaya
The influence of some physico-chemical heterogeneities of the sea surface (the presence of surfactants, drift currents, and stratification of the air layer adjacent to water) on the characteristics of the wind-wave interaction has been studied.
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