Conveners
Session 2: Low background counting techniques
- Tadafumi Kishimoto (Osaka University)
Session 2: Low background counting techniques
- Pia Loaiza (LAL)
Session 2: Low background counting techniques
- Pia Loaiza (LAL)
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Brendan McNally (XIA LLC)24/05/2017, 11:10OralAlpha particle emission – even at extremely low levels – is a significant issue in the search for rare events (e.g., double beta decay, dark matter detection). Traditional measurement techniques require long counting times to measure low sample rates in the presence of much larger instrumental backgrounds. To address this, a commercially available instrument developed by XIA uses pulse shape...Go to contribution page
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Dr Kazuyoshi Kobayashi (ICRR, University of Tokyo)24/05/2017, 11:30Orale have established the new method to measure the Pb210/Po210 contamination in bulk copper using low background alpha counter. We measured the various kinds of copper and found that even oxygen free copper contaminates a few tens mBq/kg of Pb210. By electrolytic refining, most of Pb210 is removed. But small amount of Pb210 remain in the refined coppers. Also we found that Pb210...Go to contribution page
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Dr Elena Sala (CUP - Institute for Basic Science)24/05/2017, 11:50OralThe Center for Underground Physics (CUP) of IBS has developed in collaboration with CANBERRA an ultra low background Array of 14 p-type coaxial HPGe detectors, each having a 70% relative efficiency. This instrument has been designed and constructed with materials selected in radio purity to reach the lowest possible intrinsic background. The contribution to the instrument background due to...Go to contribution page
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Dr Gunther Korschinek (Physik-Department, TU München)24/05/2017, 13:30OralThe sensitivity of experiments in rare event physics like for example dark matter detection crucially depends on the background level. Therefore, all material surrounding the detectors requires low contamination of radionuclides in order not to create additional background. A significant contribution originates from the primordial actinides thorium and uranium and the progenies of their decay...Go to contribution page
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Dr Shintaro Ito (Okayama University)24/05/2017, 13:50OralThe Super-Kamiokande Gadolinium project (SK-Gd) aims to measure Supernova Relic Neutrino by adding Gadolinium Sulfate into the Super-Kamiokande. Before loading, radioactive contamination (e.g. U, Th) in Gadolinium Sulfate should be purified. At present, purification of Gadolinium Sulfate is in progress, however there is no way to measure radioactive contamination in Gadolinium Sulfate with...Go to contribution page
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Ms Ying Yuan (Peking University)24/05/2017, 14:10Oral1. A brief introduction to the trace analysis lab for Low Radioactivity Techniques at Peking University 2. Isotope dilution analysis using radioactive tracers for U and Th Cu Polymethyl Methacrylate (PMMA） Stainless SteelGo to contribution page
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Dr Isaac Arnquist (Pacific Northwest National Laboratory)24/05/2017, 14:30OralThis presentation will discuss two areas of recent research at Pacific Northwest National Laboratory: the determination of K in ultralow background detector materials and the automation of complex sample separations for the ultrasensitive determination of U and Th. Along with the U and Th decay series species, 40K is a naturally-occurring radioactive contaminant that can cause problematic...Go to contribution page
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Dr Wei Min Chan (Research Center for Nuclear Physics, Osaka University)24/05/2017, 15:10OralLow background HPGe detector is commonly used as high energy resolution gamma-ray spectrometer for radioactivity measurement. At Kamioka Underground Observatory (2700 m.w.e.), a HPGe detector system was developed in CANDLES Experimental Hall for material screening, tantalum-180m ($^{180m}$Ta) half-life measurement and multipurpose use. To improve the sensitivity for the detector system,...Go to contribution page
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Dr Andreas Piepke (University of Alabama)24/05/2017, 15:30OralNeutron Activation Analysis (NAA) is an established trace element analysis technique. It has important applications in the determination of very small amounts of natural radioactivity and is routinely used in the preparation of low energy low event rate experiments. In this talk I will introduce NAA and describe its use in the EXO-200 and nEXO projects, putting it into the context of the...Go to contribution page
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Dr Massimiliano Nastasi (INFN Sec. of Milano-Bicocca)24/05/2017, 15:50OralThe radio purity of materials is the essential condition upon which rely the latest experiments in nuclear and particle physics. In fact, from the radio purity of the materials depends the most reduction of the experiment intrinsic background. In cases of observation of neutrino oscillation, double beta and dark matter, the greatest risk is the fact that the common radioactive background -...Go to contribution page