Characterization of SABRE crystal NaI-33 with direct underground counting

M Antonello; IJ Arnquist; E Barberio; T Baroncelli; J Benziger; LJ Bignell; I Bolognino; F Calaprice; S Copello; I Dafinei; D D’Angelo; G D’Imperio; M D’Incecco; G Di Carlo; M Diemoz; A Di Giacinto; A Di Ludovico; W Dix; AR Duffy; E Hoppe; A Ianni; M Iannone; L Ioannucci; S Krishnan; GJ Lane; I Mahmood; A Mariani; S Milana; J Mould; F Nuti; D Orlandi; V Pettinacci; L Pietrofaccia; S Rahatlou; F Scutti; M Souza; AE Stuchbery; B Suerfu; C Tomei; P Urquijo; C Vignoli; A Wallner; M Wada; AG Williams; A Zani; M Zurowski

Journal article

Characterization of SABRE crystal NaI-33 with direct underground counting

M Antonello, IJ Arnquist, E Barberio, T Baroncelli, J Benziger, LJ Bignell, I Bolognino, F Calaprice, S Copello, I Dafinei, D D’Angelo, G D’Imperio, M D’Incecco, G Di Carlo, M Diemoz, A Di Giacinto, A Di Ludovico, W Dix, AR Duffy, E Hoppe Show all

European Physical Journal C | SPRINGER | Published : 2021

DOI: 10.1140/epjc/s10052-021-09098-5

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Abstract

Ultra-pure NaI(Tl) crystals are the key element for a model-independent verification of the long standing DAMA result and a powerful means to search for the annual modulation signature of dark matter interactions. The SABRE collaboration has been developing cutting-edge techniques for the reduction of intrinsic backgrounds over several years. In this paper we report the first characterization of a 3.4 kg crystal, named NaI-33, performed in an underground passive shielding setup at LNGS. NaI-33 has a record low 39K contamination of 4.3 ± 0.2 ppb as determined by mass spectrometry. We measured a light yield of 11.1 ± 0.2 photoelectrons/keV and an energy resolution of 13.2% (FWHM/E) at 59.5 keV..

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University of Melbourne Researchers

Elisabetta Barberio Author

Federico Scutti Author

Phillip Urquijo Author

Anthony Williams Author

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FULL SCALE DETECTOR SYSTEM FOR THE FIRST AUSTRALIAN DARK MATTER EXPERIMENT

This project aims to complete a detector system to detect dark matter via nuclear recoil in the Stawell Underground Physics Laboratory (SUPL..

STAWELL UNDERGROUND PHYSICS LABORATORY: DARK MATTER DETECTOR DEVELOPMENT

This project aims to develop ultra-sensitive detector technology essential for SABRE, a Northern and Southern Hemisphere dual-detector exper..

Grants

Awarded by National Science Foundation

Funding Acknowledgements

The SABRE program is supported by funding from INFN (Italy), NSF (USA), and ARC (Australia Grants: LE170100162, LE16010080, DP170101675, LP150100075, CE200100008). We thank the Director and staff of the Laboratori Nazionali del Gran Sasso for their support, in particular Dr. Matthias Laubenstein. We thank Sergio Parmeggiano from INFN Milano.