排序方式: 共有67条查询结果,搜索用时 15 毫秒
41.
Ch. Berger W. Lackas F. Raupach W. Wagner G. Alexander J. Bürger L. Criegee H. C. Dehne R. Devenish G. Flügge G. Franke Ch. Gerke E. Hackmack P. Harms G. Horlitz Th. Kahl G. Knies E. Lehmann B. Neumann B. Stella R. L. Thompson U. Timm P. Waloschek G. G. Winter S. Wolff W. Zimmermann O. Achterberg V. Blobel L. Boesten H. Daumann A. F. Garfinkel H. Kapitza B. Koppitz W. Lührsen R. Maschuw H. Spitzer R. van Staa G. Wetjen A. Bäcker K. Derikum C. Grupen H. J. Meyer G. Zech H. J. Daum H. Meyer O. Meyer M. Rössler K. Wacker PLUTO Collaboration 《Zeitschrift fur Physik C Particles and Fields》1979,1(4):343-347
The electronic width Γ ee and the muonic branching ratioB μμ =Γ μμ /Γtot of the Γ(9.46) have been measured as Γ ee =(1.33±0.14) andB μμ=(2.2±2.0)%. From these values a lower limit of Γtot<23keV for the total width of the Γ(9.46) is obtained. 相似文献
42.
43.
44.
45.
Alves GA Amato S Anjos JC Appel JA Bracker SB Cremaldi LM Darling CL Dixon RL Errede D Fenker HC Gay C Green DR Jedicke R Kaplan D Karchin PE Kwan S Leedom I Lueking LH Luste GJ Mantsch PM de Mello Neto JR Metheny J Milburn RH de Miranda JM da Motta Filho H Napier A d'Olivera AB Rafatian A dos Reis AC Reucroft S Ross WR Santoro AF Sheaff M Souza MH Spalding WJ Stoughton C Streetman ME Summers DJ Takach SF Wu Z 《Physical review letters》1992,69(22):3147-3150
46.
47.
48.
Ch. Berger W. Lackas F. Raupach G. Alexander J. Bürger L. Criegee H. C. Dehne R. Devenish G. Flügge G. Franke Ch. Gerke G. Knies E. Lehmann B. Stella U. Timm W. Wagner Waloschek G. G. Winter W. Zimmermann O. Achterberg V. Blobel L. Boesten H. Kapitza B. Koppitz W. Lührsen H. Spitzer R. van Staa A. Bäcker S. Brandt K. Derikum C. Grupen H. J. Meyer B. Neumann G. Zech H. J. Daum H. Meyer O. Meyer M. Rössler K. Wacker PLUTO Collaboration 《Zeitschrift fur Physik C Particles and Fields》1981,8(2):101-114
Multihadron events resulting frome + e ? annihilation at the Υ-resonance are analysed with respect to lowest order QCD which predicts a dominant Υ decay into three vector gluons. Smearing effects due to the gluon fragmentation are so large, however, that no clear 3-jet structure or flatness is expected in the hadron final state. Instead, Monte Carlo simulations predict event structures with thrust and triplicity distributions distinctly different from those of two quark-jet and of phase space like decay mechanisms. The data are in perfect agreement with the 3-vector gluon decay as predicted by QCD and exclude dominantly phase space like or 2-quark jet decays. Also, the decay into scalar gluons is excluded by the data. An upper limit for the Υ-decay into one photon and two gluons is obtained. 相似文献
49.
de Farias RF de Souza JM de Melo JV Airoldi C 《Journal of colloid and interface science》2000,227(1):147-151
Polyaniline deposited on As(2)O(3) surface resulted in a new material, which was characterized by infrared spectoscopy, thermogravimetry, differential scanning calorimetry, scanning electron microscopy, X-ray diffraction, and cyclic voltammetry. The mass percentage of polymer deposited on oxide surface is approximately 13%. The scanning electron microscopy images as well as the X-ray diffraction patterns provided conclusive evidence that the oxide surface is coated by the polymer. The cyclic voltammograms of the polyaniline adsorbed on As(2)O(3) surface showed that the adsorbate exerts remarkable effects on redox processes on this oxide. The pure oxide exhibited two oxidation/reduction peaks at 0.25/-0.06 and 0.47/-0.25 V attributed tentatively to the processes As(2)O(3)(s)+6H(+)+6e(-)=2As(s)+3H(2)O and As(s)+3H(+)+3e(-)=AsH(3)(g), respectively. The polyaniline-coated sample exhibited a better-defined voltammogram in which the first oxidation peak of the oxide had its intensity increased about four times. Copyright 2000 Academic Press. 相似文献
50.
Aitala EM Amato S Anjos JC Appel JA Ashery D Banerjee S Bediaga I Blaylock G Bracker SB Burchat PR Burnstein RA Carter T Carvalho HS Costa I Cremaldi LM Darling C Denisenko K Fernandez A Gagnon P Gerzon S Gobel C Gounder K Granite D Halling AM Herrera G Hurvits G James C Kasper PA Kondakis N Kwan S Langs DC Leslie J Lichtenstadt J Lundberg B Manacero A MayTal-Beck S Meadows B de Mello Neto JR Milburn RH de Miranda JM Napier A Nguyen A d'Oliveira AB O'Shaughnessy K Peng KC Perera LP Purohit MV 《Physical review letters》1996,76(3):364-367