نتایج جستجو برای: nai tl detectors
تعداد نتایج: 42389 فیلتر نتایج به سال:
Apariţia de noi tipuri de detectori cu scintilatori anorganici LaBr3(Ce) şi LaCl3(Ce), a generat necesitatea testării lor pentru diferite aplicaţii. Ca o alternativă a detectorului NaI(Tl), utilizat, în mod tradiţional, în sistemele gama de monitorizare a I-131, în tiroidă, a fost considerat pentru caracterizare, un detector LaBr3(Ce), de dimensiuni 1.5“ x 1.5”. Rezultatele au fost evaluate, ur...
Monte Carlo simulations were performed using the GEANT4 code for the investigation of gamma-ray absorption in water in different spherical geometries and of the efficiency of a NaI(Tl) detector for different radionuclides in the aquatic environment. In order to test the reliability of these simulations, experimental values of the NaI(Tl) detector efficiency were deduced and seem to be in good a...
Abstract We implemented a didactic experiment to study the angular correlation between two gamma rays emitted in typical 60 Co radioactive decays. used NaI(Tl) scintillators, already available our laboratory, and low-activity source. The detectors were mounted on rails, with source at their center. first rail was fixed, while second could be rotated around performed several measurements by chan...
پدیده رادیولومینسانس ناشی از اندرکنش تابشهای یونیزه کننده با مواد فسفری است که آگاهی از اثرات آن با کشف اشعه ایکس در سال 1895 توسط ویلهلم کنراد رونتگن آغاز شد و تاکنون پژوهش های گسترده ای در این موضوع صورت گرفته است. این پدیده کاربردهای متعددی از جمله ساخت لامپ های کوچک، بدون مولد الکتریکی و دارای عمر طولانی، که از اهداف اصلی این بررسی می باشد، دارد. به منظور بررسی میزان نوردهی ناشی از تحت تابش...
The ≃ 100 kg highly radiopure NaI(Tl) setup of the DAMA project (DAMA/NaI) took data over seven annual cycles up to July 2002 and has achieved results on various rare processes. Its main aim has actually been the exploitation of the model independent WIMP annual modulation signature. After this conference the total exposure, collected during the seven annual cycles, was released. This cumulativ...
The ≃ 250 kg highly radiopure NaI(Tl) DAMA/LIBRA apparatus, running at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N., is described.
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