Cosmogenic activation of Germanium and its reduction for low background experiments
I. Barabanov, S. Belogurov, L. Bezrukov, A. Denisov, V. Kornoukhov, N. Sobolevsky
Abstract
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.
Create a lesson
Related papers
Direct measurement of the in-medium η mass spectrum through the γγ decay channel
Y. Matsumura, N. Muramatsu, T. A. Hashimoto et al.
STAR Highlights II: Study of Small Systems and the Search for New, Exotic Physics
Jiangyong Jia
Cluster emission and its impact on the r-process nucleosynthesis
Natalia Thomas, Silvia Bara, Thomas Elias Cocolios et al.
Core Breaking at Low Spin in 68Zn from Nuclear Resonance Fluorescence
S. R. Johnson, R. V. F. Janssens, B. A. Brown et al.
Isoscalar Giant Resonances in the even-A Pd Isotopes
J. Arroyo, U. Garg, T. Furuno et al.
Efficient production of 229m,gTh via neutron capture in VUV-transparent crystals
Zhong-yi Chen, Hao-yang Lan, Di Wu et al.