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121.
A. V. Dobkin T. V. Loseva I. V. Nemchinov I. A. Trubetskaya V. V. Shuvalov 《Journal of Applied Mechanics and Technical Physics》1993,34(6):775-783
Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, No. 6, pp. 35–45, November–December, 1993. 相似文献
122.
G.?N.?Dudkin S.?I.?KuznetsovEmail author M.?I.?Lomaev B.?A.?Nechaev V.?N.?Padalko D.?A.?Sorokin V.?F.?Tarasenko E.?N.?Shuvalov S.?V.?Bondarenko 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2016,10(2):375-380
The results of experiments on neutron generation caused by nanosecond discharges in a deuterium medium are presented. The experiments are performed using two types of potential electrodes (anodes). One of them is fabricated from steel foil, and the other is composed of tungsten wires with split ends. In both cases, a deuterium-saturated zirconium plate is employed as a flat grounded cathode. With a tungsten anode, deuterium ions generated by field ionization are demonstrated to constitute the determining part of ions involved in the acceleration process and the neutron yield arising from the reaction 2H(d, n)3He is about four times greater than that inherent to the steel-foil anode. In this case, the maximum neutron yield is 1.2 × 104 neutron/ shot, and the duration of neutron emission from the cathode is 1.5 ns. 相似文献
123.
The kinetics of 1,1-dimethylpropyl peroxy radicals recombination in polar solvents—water, methanol, and their mixtures—was studied by EPR spectroscopy in combination with the stopped-flow method, and the rate constants of this reaction were determined. Peroxyl radicals were generated by mixing solutions of Ce4+ sulfate and 1,1-dimethylpropyl hydroperoxide. The observed EPR signal of the peroxyl radical is a singlet with a g-factor of 2.015 ± 0.001, and a line width of ΔH = (1.36 ± 0.02) × 10?3 T for methanol and ΔH = (9.7 ± 0.2) × 10?4 T for water. The measured rate constants of (CH3)2C(O2·)CH2CH3 radical recombination at 298 K are 2kt = (3.9 ± 0.4) × 104 L mol?1 s?1 for water and 2kt = (5.2 ± 0.5) × 103 L mol?1 s?1 for methanol. A linear relationship between ln(2kt) and the Kirkwood function (ε?1)/(2ε + 1), where e is the dielectric constant of the medium, has been established, indicating an important role of nonspecific solvation in the recombination of tertiary peroxyl radicals. 相似文献
124.
The arrangement of an experiment to detect the P?odd and P, T?odd polarized part of the Mössbauer (+3/2– +1/2) gamma transition of a deformed 169Tm nucleus with an energy of 8.4 keV by Compton polarimetry is discussed. Tm 2O3 single crystal with a quadrupolarly split Mössbauer spectrum is proposed as a resonance polarizer. A Be-scatterer-based Compton polarimeter and a synchronously detecting system will be used to measure the P-odd circular polarization PCand P, T-odd linear polarization PL.The expected accuracy of measuring the relative magnitude of the P, T-odd contribution is about 1% of the magnitude of usual weak nucleon–nucleon interaction. 相似文献
125.
Calculation of the effective quasistatic shear speed c in 2D solid phononic crystals is analyzed. The plane-wave expansion (PWE) and the monodromy-matrix (MM) methods are considered. For each method, the stepwise sequence of upper and lower bounds is obtained which monotonically converges to the exact value of c. It is proved that the two-sided MM bounds of c are tighter and their convergence to c is uniformly faster than that of the PWE bounds. Examples of the PWE and MM bounds of effective speed versus concentration of high-contrast inclusions are demonstrated. 相似文献
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127.
N. P. Reznichenko V. A. Shuvalov 《Journal of Applied Mechanics and Technical Physics》1989,30(6):840-847
Translated from Zhurnal Prikladnoi Mekhaniki i Tekhnicheskoi Fiziki, Vol. 30, No. 6, pp. 11–19, November–December, 1989. 相似文献
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