A high efficiency, low background counting setup has been made at TIFR consisting of a special HPGe detector (∼ 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 124Sn 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.
@article{arxiv.1311.4779,
title = {Characterization and modeling of a low background HPGe detector},
author = {N. Dokania and V. Singh and S. Mathimalar and V. Nanal and S. Pal and R. G. Pillay},
journal= {arXiv preprint arXiv:1311.4779},
year = {2014}
}
Comments
23 pages, 13 figures, re-submitted to NIM A (minor changes in text, figures and table)