نتایج جستجو برای: electron spin polarisation
تعداد نتایج: 416786 فیلتر نتایج به سال:
Polarisation sensitive emission spectroscopy measurements are reported for a petawatt laser-solid target interaction at intensities up to 5 10 W cm . These measurements were single-shot and used pairs of highly-orientated graphite spectrometers to resolve the sulphur Ly-a doublet. The sulphur Ly-a1 component shows a large positive polarisation indicative of a low energy electron beam in the pla...
Atomic bremsstrahlung-polarisation correlation between incoming electrons and outgoing photons may allow to design a polarimeter capable of measuring all components of beam polarisation simultaneously. This device can be called a vector polarimeter. It might allow to test theoretical predictions of correlation coefficients between 1 and 3.5 MeV as well as work as a beam diagnostics device. As a...
in a typical solitonic distribution, the soliton density is distributed over the entire moleculeand the present work shows how its density can be decomposed into solitonic and antisolitoniccomponents. it is found that there exists a unique electron as soliton over the anionicnanoconductor, while there are many other solitons and antisolitons. the solitonic states are furtherdecomposed to the ca...
چکیده ندارد.
Precise knowledge of all beam parameters is crucial to fully exploit the physics potential of the International Linear Collider (ILC). A sufficiently accurate measurement of the beam polarisation can only be achieved using dedicated high energy Compton polarimeters combined with well-designed Cherenkov detectors. The requirements have been evaluated and a suitable Cherenkov detector prototype h...
M&a&--The V, centre in halide crystals is often described in terms of an X2molecule ion, Recent moteeuiaf calculations for the haiogen molecule negative ions have enabled a detailed comparison to be made between the theoretical anion and the resuhs from optical and spin resonance studies on the crystals. The optical absorption line widths are naturally dependant on the host lattice, but the exc...
It is a common knowledge that the formation of electron pairs is a necessary ingredient of any theoretical work describing superconductivity. Thus, finding the mechanism of the formation of the electron pairs is of utmost importance. There are some experiments on high transition temperature superconductors which support the electron-phonon (e-ph) interactions as the pairing mechanism (ARPES),...
در این رساله با استفاده از نرم¬افزار espresso در ابتدا خواص انبوهه¬ی بلور crse در هر دو ساختار nias و بلندروی به تفصیل مورد مطالعه قرار گرفته است. در ادامه خواص الکترونی، مغناطیسی و ناپیوستگی نواری مرز مشترک crse/znse را با ساخت ابریاخته¬های با ضخامت¬های مختلف (16، 20 و 24 لایه¬ای) استخراج کردیم. محاسبات نشان دادند که خاصیت نیم¬فلزی در مرزمشترک cr/se حفظ شده و اندازه¬ی گاف نیم¬فلزی برابر 1.9 ال...
Results on elastic vector meson production at HERA are presented in the framework of perturbative QCD. The energy dependence of the cross section for J/ψ photoproduction and for ρ electroproduction is studied. A full polarisation analysis, including the measurement of the 15 elements of the spin density matrix and of R = σL/σT , is presented for ρ electroproduction. Finally heavier vector meson...
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