نتایج جستجو برای: nai tl detectors
تعداد نتایج: 42389 فیلتر نتایج به سال:
The nuclear reaction Ne(p, γ)Na has been investigated in the astrophysical interesting energy region from Ep = 600 keV to Ep = 1400 keV. Furthermore several resonances of the reaction Al(p, γ)Si have been measured in an energy range of Ep = 400 keV to Ep = 1400 keV to determine the calibration and efficiency of the detector setup. The experiments and corresponding measurements have been perform...
One of the scientific objectives of NASA’s Fermi Gamma-ray Space Telescope is the study of Gamma-Ray Bursts (GRBs). The Fermi Gamma-Ray Burst Monitor (GBM) was designed to detect and localize bursts for the Fermi mission. By means of an array of 12 NaI(Tl) (8 keV to 1 MeV) and two BGO (0.2 to 40 MeV) scintillation detectors, GBM extends the energy range (20 MeV to > 300 GeV) of Fermi’s main ins...
Testing the DAMA/LIBRA annual modulation result independently of dark matter particle and halo models has been a challenge for twenty years. Using same target material, NaI(Tl), is required presently two experiments, ANAIS-112 COSINE-100, are running such goal. A precise knowledge detector response to nuclear recoils mandatory because this most likely channel find signal. The light produced by ...
Scintillation characteristics of a thallium doped sodium iodide (NaI(Tl)) crystal with dimension 0.6 x 2 cm3 are studied by attaching silicon photomultiplier (SiPM) direct to the over temperature range from 93 300 K. The scintillation light output and decay time measured irradiating 59.54 keV gamma-rays 241Am source. We observed approximately 20% increase in yield at 230K compared that room tem...
We describe an experimental setup for making precision measurements of relative β-decay rates of (22)Na, (36)Cl, (54)Mn, (60)Co, (90)Sr, (133)Ba, (137)Cs, (152)Eu, and (154)Eu. The radioactive samples are mounted in two automated sample changers that sequentially position the samples with high spatial precision in front of sets of detectors. The set of detectors for one sample changer consists ...
COSINE-100 is a direct detection dark matter experiment that aims to test DAMA/LIBRA's claim of discovery by searching for matter-induced annual modulation signal with NaI(Tl) detectors. We present new constraints on the from dataset 2.82 yr livetime utilizing an active mass 61.3 kg, total exposure 173 kg$\cdot$yr. This result features improved event selection allows both lowering energy thresh...
This study aims to investigate the potential use of LaBr3:Ce and LaCl3:Ce materials in SPECT imaging. GATE Monte Carlo simulations of single-head gamma camera and a Tc point source were performed to evaluate the energy spectra, modulation transfer function (MTF) and detection efficiency. A range of Ce concentrations (0.5, 5, 10 and 15)% of LaBr3:Ce and LaCl3:Ce crystals was simulated in conjunc...
The delta-ray theory of track structure, applied earlier to such 1-or-more hit detection systems as the inactivation of dry enzymes and viruses, the NaI(Tl) scintillation counter, and nuclear emulsion, is extended to the silver activated phosphate glass dosimeter, the LiF thermoluminescent dosimeter, the creation of free radicals in solid biological substances, solid and liquid organic scintill...
The amounts of radioactivity in the igneous rocks have been investigated; samples were collected from the total of eight basalt rock types in the northeastern of Kurdistan region/Iraq. The activity concentration of Ra (U) series, Ac (Th) series, K and Cs were measured using Planar HPGe and NaI(Tl) detectors. Along the study area the radium equivalent activities Raeq in Bq/Kg of samples under in...
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