نتایج جستجو برای: nai tl detectors
تعداد نتایج: 42389 فیلتر نتایج به سال:
The Spherical Neutral Detector (SND) operates at VEPP-2M collider in Novosibirsk studying e + e − annihilation in the energy range up to 1.4 GeV. Detector consists of a fine granulated spherical scintillation calorimeter with 1632 NaI(Tl) crystals, two cylindrical drift chambers with 10 layers of sense wires, and a muon system made of streamer tubes and plastic scintillation counters. The detec...
attached to an external detector system, the thyroid uptake of iodine was measured at 6 and 24 hr. The external detector consisted of a 1Â1⁄4x 1 in. NaI(Tl) scintillation crystal and a flat-field lead collimator. A Lucite extension of the collimator was shaped to fit the neck and assure good geometry with a neck-to crystal distance of 20 cm. A standard neck phantom was used with standard capsul...
Abbreviations 2D, 3D 2-dimensional, 3-dimensional CZT cadmium zinc telluride EKG electric signal from the heart FBP filtered backprojection FOV field-of-view GE General Electric Ge(Li) germanium detector doped with lithium MLEM maximum likelihood expectation maximization NaI(Tl) sodium iodine doped with thallium NM nuclear medicine OSEM ordered subset expectation maximization PET positron emiss...
در این پایان نامه، با استفاده از دو آشکارساز nai(tl) و یک چشمه نوترون am-be، یک ابزار چاه پیمایی با کارایی مناسب پیشنهاد شده است. آشکارسازهایnai(tl) را می توان در اندازه های مختلف به راحتی تهیه کرد. چشمه ی نوترون am-be نیز در و مراکز تحقیقاتی کشور مورد استفاده قرار می گیرد. در مقابل، ابزارهای چاه پیمایی مرسوم آشکارسازهای نوترون (3bf، 3he و نظایر آن) استفاده می کنند که آشکارسازهای گران و شمول تح...
The NAIAD experiment (NaI Advanced Detector) for WIMP dark matter searches at the Boulby Underground Laboratory (North Yorkshire, UK) ran from 2000 until 2003. A total of 44.9 kg × years of data collected with 2 encapsulated and 4 unencapsulated NaI(Tl) crystals with high light yield were included in the analysis. We present final results of this analysis carried out using pulse shape discrimin...
A large number of the presently running neutrino and dark-matter experiments use thallium-doped cesium-iodide CsI[Tl] crystals, sodium-doped CsI[Na] or sodium-iodide NaI[Tl] crystals. In present paper we calculate elastic inelastic cross sections for neutral-current supernova-neutrino scattering off $^{127}\mathrm{I}$ $^{133}\mathrm{Cs}$, relevant using CsI[Tl], CsI[Na], We study also folded wi...
Slow coincidence circuits for the anti-coincidence measurements have been considered for use in Compton suppression technique. The simplified version of the slow circuit has been found to be fast enough, satisfactory and allows an easy system setup, particularly with the advantage of the automatic threshold setting of the low level discrimination. A well-type NaI detector as the main detector s...
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