نتایج جستجو برای: π electron cloud
تعداد نتایج: 423554 فیلتر نتایج به سال:
We summarize Session F of the ECLOUD’04 workshop. This session was dedicated to beam instabilities driven by electron cloud. Specifically, we discuss the principal observations of electron-cloud instabilities, analytical models, simulation codes and the next steps that need to be taken to arrive at a predictive theory.
Electron-donor function of methanofullerenes (MFs) in bulk heterojunction systems is demonstrated by the combination of MFs with the electron-transporting π-system that has a much higher electron affinity than MFs.
By fitting the R values between 3.7 and 5.0 GeV measured by the BES collaboration, the upper limit of the electron width of the newly discovered resonance Y (4260) is determined to be 240 eV at 90% C.L., together with the BABAR measurement on Γee · B(Y (4260) → π + π − J/ψ), this implies a large decay width of Y (4260) → π + π − J/ψ final states.
σ L /σ T in the ρ 0-meson diffractive electroproproduction. Abstract The background due to the direct diffractive dissociation of the photon into the π + π −-pair to the " elastic " diffractive ρ 0-meson production in electron-proton collisions is calculated. At large Q 2 the interference between resonant and non-resonant π + π − production changes the σ L /σ T ratio with the mass of the 2π (i....
By fitting the R values between 3.7 and 5.0 GeV measured by the BES collaboration, the upper limit of the electron width of the newly discovered resonance Y (4260) is determined to be 580 eV/c 2 at 90% C.L. Together with the BaBar measurement on Γee·B(Y (4260) → π + π − J/ψ), this implies a large decay width of Y (4260) → π + π − J/ψ final states.
Octacyano-metal-phthalocyanine MPc(CN)8 is a promising n-type stable organic semiconductor material with eight cyano groups, including strong electron-withdrawing group at its molecular terminals. However, thorough investigation of has not yet been conducted. Therefore, we synthesized FePc(CN)8 and investigated crystal structure, chemical electronic states, electrical properties, photocatalytic...
In the SPS the electron cloud is mainly produced in the dipoles. This leads to specific beam instabilities which are * [email protected] quite different in horizontal and vertical plane. The influence geometry of, both the wake field and the electron cloud, are discussed.
Over a few bunch passages photoemission and secondary emission could generate a quasi-stationary electron-cloud in the VLHC beam pipe, giving rise to a multi-bunch instability. In this paper, we report preliminary simulation results of the electron cloud build-up and its response to a beam displacement. The estimated instability rise time is about 3{4 s in both transverse planes.
IN THE TITLE COMPOUND (COMMON NAME: iodiconazole), C(19)H(19)F(2)IN(4)O, there is an intra-molecular O-H⋯N hydrogen bond and mol-ecules are linked by weak inter-actions only, namely C-H⋯N, C-H⋯O and C-H⋯F hydrogen bonds, and π-electron ring-π-electron ring inter-actions between the triazole rings with centroid-centroid distances of 3.725 (3) Å.
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