نتایج جستجو برای: nai tl
تعداد نتایج: 9441 فیلتر نتایج به سال:
The surface $^{210}$Pb is one of the main background sources for dark-matter-search experiments using NaI(Tl) crystals, and its spectral features associated with beta-decay events energies less than 60 keV depends on depth distribution in an crystal. Therefore, we must understand profile to precisely model measurement low-energy region low-background experiment crystals. We estimate contaminati...
A search of neutrino magnetic moment was carried out at the Kuo-Sheng Nuclear Power Station at a distance of 28 m from the 2.9 GW reactor core. With a high purity germanium detector of mass 1.06 kg surrounded by scintillating NaI(Tl) and CsI(Tl) crystals as anti-Compton detectors, a detection threshold of 5 keV and a background level of 1 kg(-1) keV(-1) day(-1) at 12-60 keV were achieved. Based...
Article history: Received October 22, 2012 Received in revised form February 28, 2013 Accepted Accepted date Available on line On-line date
There has been a growing interest in ultra-high purity, low-background NaI(Tl) crystals for dark matter direct searches. Past research indicates that zone refining is an efficient and scalable way to purify NaI. In particular, K Rb -- two elements with radioisotopes can cause scintillation backgrounds be efficiently removed by refining. However, never demonstrated purity NaI which became commer...
A car-borne NaI(Tl) spectrometric system was used together with a 137Cs source to obtain realistic data in the search for unshielded and semi-shielded orphan sources. The potassium-stripped counts (PSC) method was used to estimate the influence by the shielding on the detection ability. A reduction of about 5% in the critical distance was obtained for the semi-shielded source. A curve fitting m...
In environmental radiation monitoring, the time-variable natural gamma radiation background complicates the nuclide identification and analysis of a gamma spectrum. A full spectrum analysis based on the noise adjusted singular value decomposition method for the description of the time-variable background and adjustment calculations is a possible analysis method, which may provide advantages com...
ANAIS (annual modulation with NaI scintillators) is a dark matter direct detection experiment consisting of 112.5 kg NaI(Tl) detectors in operation at the Canfranc Underground Laboratory (LSC), Spain, since August 2017. ANAIS’ goal to confirm or refute model independent way DAMA/LIBRA positive result: an annual low-energy rate having all features expected for signal induced by particles standar...
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