/ Experiment-Nucl


ICP MS selection of radiopure materials for the GERDA experiment


di Vacri, M.L. (L'Aquila U.) ; Nisi, S. (Gran Sasso) ; Cattadori, C. (INFN, Milan Bicocca) ; Janicsko, J. (TUM-IAS, Munich) ; Lubashevskiy, A. (Dubna, JINR) ; Smolnikov, A. (Heidelberg, Max Planck Inst.) ; Walter, M. (Zurich U.)

Published in: AIP Conf.Proc.
Year: 2015
Vol.: 1672
Page No: 150001
Year: 2015-08-17 published

Abstract: The GERDA (GERmaniumDetector Array)experiment, located in the Gran Sasso Underground Laboratory (LNGS, Italy) aims to search for neutrinoless double beta (0νββ) decay of the 76Geisotope. Both an ultra-low radioactivity background environment and active techniques to abate the residual background are required to reach the background index (of 10−3 counts/keV kg y) at the Qββ. In order to veto and suppress those events that partially deposit energy in Gedetectors, the readout of liquidargon (LAr) scintillation light (SL) has been implemented for the second GERDA experimental Phase. A double veto system has been designed and constructed using highly radiopure materials (scintillating fibers, wavelength shifters, polymeric foils, reflective foils). This work describes the study of lead, thorium and uranium ultra-trace content, performed at the LNGS Chemistry Laboratory by High Resolution Mass Spectrometry (HR ICP MS), for the selection of all materials involved in the construction of the veto system

Keyword(s): Germanium ; Inductively coupled plasma ; Laboratory procedures ; Detector arrays ; Isotopes

Total numbers of views: 470
Numbers of unique views: 156
DOI: 10.1063/1.4928024
 Record created 2015-08-31, last modified 2015-08-31



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