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61.
R.I. Dzhelyadin S.V. Golovkin M.V. Gritsuk D.B. Kakauridze V.A. Kachanov A.K. Konoplyannikov A.S. Konstantinov V.F. Konstantinov V.P. Kubarovski A.V. Kulik L.G. Landsberg V.M. Leontiev V.A. Mukhin V.F. Obraztsov T.I. Petrunina N.S. Pokrovski Yu.D. Prokoshkin V.A. Victorov A.M. Zaitsev 《Physics letters. [Part B]》1979,84(1):143-144
The results of studying the mass spectrum of μ+μ?γγ systems produced in π?p collisions at 25 and 33 GeV/c presented. The wide-aperture magnetic spectrometer with a hodoscope γ-detector was used to identify muon pairs and photons. There is a clear peak in the mass spectrum which corresponds to the decay ω → π0μ+μ? previously not observed. The branching ratio for the decay is estimated to be 9 × 10?5 with a systematic error of 50%. 相似文献
62.
R.I. Dzhelyadin S.V. Golovkin V.F. Konstantinov V.P. Kubarovski L.G. Landsberg V.M. Leontiev V.A. Mukhin V.F. Obraztsov T.I. Petrunina N.S. Pokrovski A.M. Zaitsev 《Nuclear Physics B》1981,179(2):189-214
Experimental results on the investigation of inclusive production of muon pairs and vector mesons (J/ψ, ?0(ω)) in π?N collisions at 27 and 40 GeV/c momenta are presented. 相似文献
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64.
Yu. F. Popov A. M. Kadomtseva G. P. Vorob’ev A. A. Mukhin V. Yu. Ivanov K. I. Kamilov Ya. S. Shtofich A. M. Balbashov 《Physics of the Solid State》2004,46(7):1252-1254
By studying the magnetic and magnetoelastic properties, it is established that, as the temperature is lowered, Sm1?xSrxMnO3 single crystals (x=0.5, 0.55) undergo spontaneous phase transitions from the paramagnetic to a local charge-ordered state at Tco=220 K and to an A-type antiferromagnetic state at TN=175 K. It is shown that strong magnetic fields (Hcr ~ 200 kOe) break up the antiferromagnetic order and charge ordering and drive a phase transition to a conducting ferromagnetic state. H-T phase diagrams are constructed for single crystals with x=0.5 and 0.55. 相似文献
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In the relativistic σ-ω model, the influences of the parameters b, c, d in the potential U(σ) = (1/2!)bo2 - -(1/3!)cσ3 (1/4!)dσ4 to the incompressibility, effective mass and binding energy of the nuclear matter are studied in detail.The calculation of equation of state of nuclear matter shows that the values of b, c, d depend on the renormalization condition, we also find that a soft equation of state of nuclear matter can be obtained in a suitable renormalization condition, and the experimental incompressibility coefficient can be reproduced. These results are also used to study the thermal properties of hot A-resonant nuclear matter.self-interaction of σ meson, renormalization, hot and dense hadronic matter `` 相似文献
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J. Laverdière S. Jandl A. A. Mukhin V. Yu. Ivanov 《The European Physical Journal B - Condensed Matter and Complex Systems》2006,54(1):67-72
We have studied RMnO3 manganites (R = Pr, Sm, Eu, Tb, Y) Raman excitations in the 200–2800 cm-1 range as a function of temperature. Combinations of phonon energies are observed up to the fourth order, indicating the presence
of electron-phonon coupling. In comparison to Γ-point phonon combinations, double phonon excitations appear to be blue shifted
in large size rare earth ion compounds. The phonon combination intensities decrease rapidly with their increasing order, confirming
other studies which conclude that the electron-phonon coupling is not as strong as supposed in the localized limit. Moreover,
different intensity order dependences are observed between the phonon combination and the so-called Jahn-Teller mode. These
effects are better described in the orbiton-phonon coupling scheme. 相似文献
70.