Issue 4, 2013
Nuclear spectroscopy of Cd isotopes
Nuclear spectroscopy of Cd isotopes
B.S. Ishkhanov, A.A. Kostyukov
The structure of the ground and low excited states of the cadmium isotopes. The results of experimental studies on the measurement of Cd isotopes spectroscopic factors in stripping and pickup reactions were analized. The structure of the nuclear levels of Cd isotopes obtained from experimental data on spectroscopic factors in the shell model were compared with the data calculated in the boson-fermion and the quasiparticle-phonon models.
Show AbstractInfluence of dielectric matrix on the dissipative tunnel transfer in semiconductive quantum dots
Influence of dielectric matrix on the dissipative tunnel transfer in semiconductive quantum dots
V.Ch. Zhukovsky, V.D. Krevchik, M.B. Semenov, R.V. Zaitsev, I.A. Egorov, P.V. Krevchik, A.K. Aringazin, К. Yamamoto
A model of 1D - dissipative tunneling to interpret the features of tunneling current-voltage characteristics obtained in the experiment for the visualization of the local density of states in quantum dots InAs / GaAs by a combined AFM / STM has been supposed. It was found that the influence of two local modes of the wide-band matrix on the probability of 1D - dissipative tunneling leads to the appearance of several randomly spaced peaks in the relevant field dependence. It is shown that the theoretical dependence for the tunnel probability agrees qualitatively with the experimental current-voltage characteristics of contact AFM probe to the surface of the InAs QDs.
Show AbstractA software package with an interactive interface for the study of acoustic fields of multi-element arrays for ultrasonic surgery
A software package with an interactive interface for the study of acoustic fields of multi-element arrays for ultrasonic surgery
Rosnitskiy Pavel Borisovich, Ilyn Sergey Andreevich, Sapozhnikov Oleg Anatolevich, Khokhlova Vera Aleksandrovna
We study the acoustic field of a powerful phased array at different positions of the focus by using an analytical method. Due to the fact that the speed of the analytical calculation is much higher than the rate of the numerical one, the distributions of the pressure amplitude in different planes and in a wide spatial area were obtained. Three-dimensional fields generated by arrays are quite difficult to interpret. For the convenience of the application of the analytical method, a software package that creates a graphical interface for the calculation of the array field and visualization of the results were developed. In the data analysis we determined a region of focusing space, in which strong side effects do not appear.
Show AbstractCharacteristics of the resonant measuring converter with below-cutoff part and moisture sensor
Characteristics of the resonant measuring converter with below-cutoff part and moisture sensor
D.A. Polietaiev
In work the numerical model of the coaxial resonator with below-cutoff part for microwave moisture metering was suggested. Determined it sensitivity for different operating wavelengths. Established the most important properties of the resonator with below-cutoff part and proposed moisture sensor based on it.
Show AbstractShock waves and cavitation bubbles dynamics dependence on the intense femtosecond laser radiation energy in distilled water and acetone.
Shock waves and cavitation bubbles dynamics dependence on the intense femtosecond laser radiation energy in distilled water and acetone.
Potemkin Fedor Viktorovich Mareev Evgeniy Igorevich
For the first time using the two-dimensional shadowgraphy map (time-laser energy) of energy transfer dynamics on the nanosecond time scale under tightly focused intense femtosecond laser radiation in the volume of strongly absorbing dielectric liquid (acetone, distilled water) was carried out. The energy of the resulting shock wave is proportional to the energy of the incident femtosecond pulse. The dependence of the initial shock wave velocity and the pressure from the laser pulse energy was investigated. The maximum velocity, and accordingly, the pressure observed at the maximum energy was about 4400 ± 400 m / s and 5.9 ± 1.3 GPa in acetone 7200 ± 300 m / s and 26 ± 3GPa in water. Saturation of the shock wave diameter as a function of laser pulse energy and reverse cubic growth to it was obtained. It is shown that the radius of the cavitation bubble was inverse cubic on the laser radiation energy.
Show AbstractExperimental verification of extended theories of gravity
Experimental verification of extended theories of gravity
K.A. Rannu, P.I. Dyadina
Parameterized post-Newtonian formalism is one of methods for experimental verification of gravity theories and imposing additional limits on their parameters' values. The Gauss-Bonnet model with scalar field is studied using the PPN-formalism in the present work. The scenario with 7 noncompact extra dimensions namely the Randall-Sundrum II model is considered as the alternative to geometrical approach to GR extension.
Show AbstractLARGE-SCALE STRUCTURE OF THE TAIL CURRENT BY THEMIS DATA DURING EXTREMELY LOW SOLAR ACTIVITY
LARGE-SCALE STRUCTURE OF THE TAIL CURRENT BY THEMIS DATA DURING EXTREMELY LOW SOLAR ACTIVITY
I.S. Nazarkov, V.V. Kalegaev
On the base of simultaneous measurements from the THEMIS satellites, the radial profile of the magnetic field and the position of the inner edge of the magnetospheric tail were determined during selected events in 2009. The magnetic field of the currents other than the tail current was subtracted from measurements. It was found that during quiet times the inner edge of the tail current sheet is located in the night side magnetosphere, at distances of about 12 RE. In the vicinity of the inner edge of the tail current the magnetic field Bx and Bz components were about -20 nT, while in the distant tail, at XGSM -30 RЕ, these values were about -10 nT. During geomagnetic disturbances the inner edge of the tail current sheet shifted towards the Earth to a distance of about 7 RE. At the same time strong currents in the magnetotail were detected. During the disturbance of February 14, 2009 (min Dst -35 nT), the Bx component of the magnetic field near the inner edge of the tail current sheet was about 70 nT, and the Bz component was about -50 nT. Solar wind conditions on 14.02.2009 were consistent with those during moderate magnetic storms with minimum Dst of about -100 nT. However, strong currents, measured in the geomagnetic tail cause the insignificant Dst-effect. Actually, during the 2009 extremely quiet epoch, the magnetospheric current systems (magnetopause and cross-tail currents) were located at larger geocentric distances than typical and produce small disturbance on the Earth's surface.
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