نتایج جستجو برای: bremsstrahlung spect

تعداد نتایج: 13213  

2010
R. Märtin R. Barday J. Enders M. Hegewald

Bremsstrahlung is one of the basic photon-matter processes occurring in collisions of electrons with atoms and ions. Bremsstrahlung in electron-atom collisions has been the object of extensive experimental and theoretical studies [1]. These studies focused on the angular dependence of the intensity distribution of the bremsstrahlung, as well as on its linear polarization [2]. Another production...

Journal: :Physical Review A 1972

Journal: :Physical Review C 1999

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده علوم پایه 1392

برش نگاری رایانه ای گسیل تک فوتون (spect) یک روش تصویربرداری بر اساس تزریق یک رادیوداروی گسیلنده گاما به بدن بیمار است. یک سامانه spect شامل دوربین (یا دوربین های) گاما است که با چرخش حول بدن بیمار و ثبت پرتوهای گامای ساطع شده از آن به جمع آوری اطلاعات در زوایای متفاوت (نگاره) می پردازد. این نگاره ها سپس به کمک الگوریتم های بازسازی، پردازش گشته تا در نهایت یک توزیع سه بعدی از توزیع پرتوزایی در ...

2007
Y. Yamamoto

Bremsstrahlung was measured as a function of stored beam current using the BGO scintillation spectrometer at the compact superconducting storage ring of Ritsumeikan University. Bremsstrahlung is emitted for collision of stored electrons and residual gas on the beam orbit. Yield of bremsstrahlung depend on stored beam current and residual gas density. We tried to determine gas density on the bea...

2008
Andrej B. Arbuzov

One-loop radiative corrections to the leptonic tensor in high energy bremsstrahlung on heavy nuclei are calculated. Virtual and real photon radiation is taken into account. Double bremsstrahlung is simulated by means of Monte Carlo. Numerical results are presented for the case of muon bremsstrahlung in conditions of the COMPASS experiment at CERN.

2014
C Köhn

Thunderstorms emit terrestrial gamma-ray flashes with photon energies of up to tens of MeV and electron-positron beams that are created by photons with energies above 1.022 MeV. These photons are produced through the bremsstrahlung process when energetic electrons collide with air molecules. However, presently used cross sections for bremsstrahlung treat only the interaction of the electrons wi...

Journal: :iranian journal of radiation research 0
i. akkurt suleyman demirel university, science and arts faculty physics department, isparta, turkey k. gunoglu suleyman demirel university, science and arts faculty physics department, isparta, turkey h.o. tekin suleyman demirel university, science and arts faculty physics department, isparta, turkey z.n. demirci suleyman demirel university, science and arts faculty physics department, isparta, turkey g. yegin celal bayar university, science and arts faculty physics department, manisa, turkey d. demir uludag university, science and arts faculty physics department, bursa, turkey

background: as bremsstrahlung photon beam fluence is important parameter to be known in a photonuclear reaction experiment as the number of produced particle is strongly depends on photon fluence. materials and methods: photon production yield from different thickness of aluminum target has been estimated using artificial neural network (ann) model. target thickness and incoming electron energy...

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