Characterization and modeling of a low background HPGe detector

Abstract

A high efficiency, low background counting setup has been made at TIFR consisting of a special HPGe detector ($\sim$ 70%) surrounded by a low activity copper+lead shield. Detailed measurements are performed with point and extended geometry sources to obtain a complete response of the detector. An effective model of the detector has been made with GEANT4 based Monte Carlo simulations which agrees with experimental data within 5%. This setup will be used for qualification and selection of radio-pure materials to be used in a cryogenic bolometer for the study of Neutrinoless Double Beta Decay in ${}^{124}$Sn as well as for other rare event studies. Using this setup, radio-impurities in the rock sample from India-based Neutrino Observatory (INO) site have been estimated.

23 pages, 13 figures, re-submitted to NIM A (minor changes in text, figures and table)

References in corpus (6)

• Results on neutrinoless double beta decay of 76Ge from GERDA Phase I
• Search for Neutrinoless Double-Beta Decay in ${}^{136}$Xe with EXO-200
• Systematic study of trace radioactive impurities in candidate construction materials for EXO-200
• Search for ${\beta }^{+}$EC and ECEC processes in ${}^{112}$Sn and ${\beta }^{-}{\beta }^{-}$ decay of ${}^{124}$Sn to the excited states of ${}^{124}$Te
• Measurement of the background in the NEMO 3 double beta decay experiment
• First observation of alpha decay of 190-Pt to the first excited level (E_{exc}=137.2 keV) of 186-Os

Cited by in corpus (8)

• Summing coincidence in rare event gamma-ray measurements under an ultra-low background environment
• High-precision efficiency calibration of a high-purity co-axial germanium detector
• Study of neutron-induced background and its effect on the search of 0$\nu \beta \beta$ decay in ${}^{124}\mathrm{Sn}$
• Required sensitivity to search the neutrinoless double beta decay in ${}^{124}Sn$
• Study of Radioactive Impurities in Neutron Transmutation Doped Germanium
• New limit for the half-life of double beta decay of ${}^{94}$Zr to the first excited state of ${}^{94}$Mo
• Radiopurity studies of a rock sample from the Aut region
• Unified framework for precise background modeling to enhance rare event detection at the Kuo-Sheng nuclear reactor laboratory