2005/11/28 by I. Barabanov, И. Р. Барабанов, S. Belogurov +7 · 50 citations
Chemistry · Physics and Astronomy · #Chemistry #Cosmic ray #Detector #Double beta decay #Environmental science #Geology #Germanium #Isotope #Isotopes of germanium #Materials science #Metallurgy #Neutrino #Neutrino Physics Research #Nuclear engineering #Nuclear physics #Optics #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #Physics #Radiochemistry #Reduction (mathematics) #Semiconductor detector #Shield #Silicon #nucl-ex
paper · pdf · doi:10.1016/j.nimb.2006.05.011
published in Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms 251(1), 115-120 (Elsevier BV) · 10 pages, 3 tables, 6 figures
arxiv created 2005/11/28 · openalex publication_date 2006/07/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Production of 60Co and 68Ge from stable isotopes of Germanium by nuclear active component of cosmic rays is a principal background source for a new generation of 76Ge double beta decay experiments like GERDA and Majorana. The biggest amount of cosmogenic activity is expected to be produced during transportation of either enriched material or already grown crystal. In this letter properties and feasibility of a movable iron shield are discussed. Activation reduction factor of about 10 is predicted by simulations with SHIELD code for a simple cylindrical configuration. It is sufficient for GERDA Phase II background requirements. Possibility of further increase of reduction factor and physical limitations are considered. Importance of activation reduction during Germanium purification and detector manufacturing is emphasized.