نتایج جستجو برای: pn semiconductor detector
تعداد نتایج: 128614 فیلتر نتایج به سال:
The decay rate of 7Be depends on the electron density at the nucleus and therefore may vary with the chemical environments of the Be atom. Using a 100% efficiency high-purity germanium detector, the decay constants of Be in Be2C(OH2)4, Be(OH)2 and BeO have been measured at unprecedented high precision (of š0.01%), resulting in T1=2 D 53.69 d, 53.42 d, and 54.23 d, respectively. The observed dif...
The p-n Junction The p-n junction is a homojunction between a p-type and an n-type semiconductor. It acts as a diode, which can serve in electronics as a rectifier, logic gate, voltage regulator (Zener diode), switching or tuner (varactor diode); and in optoelectronics as a light-emitting diode (LED), laser diode, photodetector, or solar cell. In a relatively simplified view of semiconductor ma...
A first study of neutron tagging is conducted in Super–Kamiokande, a 50,000-ton water Cherenkov detector. The tagging efficiencies of thermal neutrons are evaluated in a 0.2 % GdCl3-water solution and pure water. They are determined to be, respectively, 66.7 % for events above 3 MeV and 20 % with corresponding background probabilities of 2 × 10 and 3 × 10. This newly developed technique may ena...
The potential of GENIUS as a dark matter detector is discussed. A study was performed to demonstrate the good behaviour of the proposed detector design of naked HPGe-crystals in liquid nitrogen. The expected background components were simulated and are discussed in some detail.With the obtained background GENIUS could cover a large part of the favoured MSSM parameter-space.
We compute the scattering rates for the lightest neutralino χ1 in the forthcoming germanium (73Ge+76Ge) detector and a proposed lead detector (207Pb), within the framework of SU(5) × U(1) supergravity. We find that in only a small portion (<∼ 10%) of the parameter spaces of this class of models, are the rates in the germanium detector above the expected initial experimental sensitivity of 0.1 e...
دی آمین ها به عنوان لیگاند در سنتز نامتقارن کاربردهای فراوانی دارند، همچنین می توانند به عنوان کی لیت یا لیگاندهای پل ساز کوئوردینه شوند و نیز به علت داشتن گروه هایnh2 قادرند در پیوندهای هیدروژنی شرکت کنند. کمپلکس هایی که از طریق واکنش دی آمین ها با فلزات واسطه تشکیل شده اند بسیار مورد استفاده قرار می گیرند. استفاده از آمین هایی که دارای حداقل دو نیتروژن می باشند به دلیل تولید کمپلکس های پایدار...
<p>In this research, we present a low phase noise (PN) and wide tuning range 175 GHz inductors capacitors (LC) voltage-controlled oscillator (VCO) based on differential Colpitts that was designed using 0.13 μm bipolar complementary metal oxide semiconductor (BiCMOS) simulated. The square of the tank Q-factor oscillation amplitude were both maximized to reduce PN. With an extensive examina...
A drift-diiusion model with density-dependent diiusion coee-cients for the ow of electrons and holes in a semiconductor crystal is considered. It contains a new class of models for recombination-generation eeects as well as boundary conditions modelling Ohmic contacts. Existence of steady state solutions is proven. For a planar pn-diode the qualitative properties of steady state solutions in de...
Cryogenic detectors operated at temperatures below 1 K offer an order of magnitude higher energy resolution than conventional semiconductor-based energy-dispersive detectors, and orders of magnitude higher efficiency that grating spectrometers. Initially developed for astrophysics applications, these detectors are increasingly used in synchrotron-based research, both for detector characterizati...
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