skip to main content

SciTech ConnectSciTech Connect

Title: Development of an underground HPGe array facility for ultra low radioactivity measurements

Low Level Counting techniques using low background facilities are continuously under development to increase the possible sensitivity needed for rare physics events experiments. The CUP (Center for Underground Physics) group of IBS is developing, in collaboration with Canberra, a ultra low background instrument composed of two arrays facing each other with 7 HPGe detectors each. The low radioactive background of each detector has been evaluated and improved by the material selection of the detector components. Samples of all the building materials have been provided by the manufacturer and the contaminations had been measured using an optimized low background 100% HPGe with a dedicated shielding. The evaluation of the intrinsic background has been performed using MonteCarlo simulations and considering the contribution of each material with the measured contamination. To further reduce the background, the instrument will be placed in the new underground laboratory at YangYang exploiting the 700m mountain coverage and radon-free air supplying system. The array has been designed to perform various Ultra Low background measurements; the sensitivity we are expecting will allow not only low level measurements of Ra and Th contaminations in Copper or other usually pure materials, but also the search for rare decays. In particular somemore » possible candidates and configurations to detect the 0╬ŻECEC (for example {sup 106}Cd and {sup 156}Dy) and rare ╬▓ decays ({sup 96}Zr, {sup 180m}Ta , etc ) are under study.« less
Authors:
; ; ; ;  [1] ; ; ;  [2]
  1. Center for Underground Physics - Institute for Basic Science, Daejeon (Korea, Republic of)
  2. Ewha Womans University, Physics Department, Seoul (Korea, Republic of)
Publication Date:
OSTI Identifier:
22488723
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1672; Journal Issue: 1; Conference: LRT 2015: 5. international workshop in low radioactivity techniques, Seattle, WA (United States), 18-20 Mar 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BUILDING MATERIALS; CADMIUM 106; CONTAMINATION; COPPER; DESIGN; DYSPROSIUM 156; HIGH-PURITY GE DETECTORS; LOW LEVEL COUNTING; MONTE CARLO METHOD; RADIOACTIVITY; RADON; SENSITIVITY; SHIELDING; UNDERGROUND; ZIRCONIUM 96