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991.
Karel Míšek 《Czechoslovak Journal of Physics》1959,9(3):411-412
992.
A. Peršin V. Henč-Bartolić D. Soldo 《Journal of Quantitative Spectroscopy & Radiative Transfer》1975,15(6):423-427
The atomic-state populations of the 5s[1]° metastable level of Kr and of the 5s2P resonant level of Br in a Kr-Br2 mixture have been determined as functions of current strength. Occurrence of energy transfer from the Kr-level to the Br-level has been verified. 相似文献
993.
994.
Pontecorvo neutrino oscillations are discussed in the case of Dirac as well as Majorana neutrino mass terms. We prove that none of the possible experiments on neutrino oscillations including those on CP nonconservation, can distinguish between these two possibilities. Oscillations of neutrinos having both Dirac and Majorana mass terms also considered. 相似文献
995.
The direct and the coincidence spectra of gamma-rays from the131Sb decay have been measured by means of different Ge(Li) detectors. The Sb sources have been prepared from mixture of235U thermal neutron fission products. The proposed level scheme of the131Te nuclei is based on the coincidence measurements, the analysis of the energy sums and the reaction data. The 49 of the total number of 64 gamma-rays observed have been placed in the present decay scheme. Properties of the some levels in131Te are compared with those observed in other oddmass Te isotopes. A probable structure of some of the excited states in131Te is discussed. 相似文献
996.
The longitudinal magnetoresistance of polycrystalline platinum wires has been measured in magnetic fields up to 45 kOe at liquid helium temperatures. The deviations from Kohler's rule found depend on the concentration of quenched-in vacancies, and are interpreted as due to the contribution of single vacancies in platinum to the small angle scattering of electrons. The small-angle scattering may also be responsible for the linear magnetoresistance of platinum in high magnetic fields. 相似文献
997.
998.
A convenient, 40% overall yield synthesis of 2,3,17β-triacetoxy-1,3,5(10)-estratriene is described, which involves epoxidation of 19-nortestosterone and subsequent acetylation, lead tetra-acetate acetoxylation of the so-formed 17β-acetoxy-4β,5-epoxy-5β-estran-3-one, and aromatization of ring A, by means of acidic alumina, of the resulting 2α and 2β epimers of 2,17β-diacetoxy-4β,5-epoxy-5β-estran-3-one. 相似文献
999.
1000.
M. Chvojka V. Hermoch B. Králiková J. Krása L. Láska K. Mašek J. Musil S. Polák K. Rohlena J. Schmiedberger J. Skála J. Sulek 《Czechoslovak Journal of Physics》1988,38(12):1337-1356
The photodissociation iodine laser system PERUN I is described. The laser generates and amplifies the subnanosecond pulse with the energy about 80 J of the fundamental wavelength 1·315 μm and beam diameter 10 cm. The physical principles of this type of the high power laser are briefly explained and the laser system and its characteristics are described from the physical and technical point of view. Special attention is paid to the realization of such system with the slow optical pumping (≈300 μs). 相似文献