Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/130398
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Characterization of SABRE crystal NaI-33 with direct underground counting |
Author: | Antonello, M. Arnquist, I.J. Barberio, E. Baroncelli, T. Benziger, J. Bignell, L.J. Bolognino, I. Calaprice, F. Copello, S. Dafinei, I. D’Angelo, D. D’Imperio, G. D’Incecco, M. Di Carlo, G. Diemoz, M. Di Giacinto, A. Di Ludovico, A. Dix, W. Duffy, A.R. Hoppe, E. et al. |
Citation: | European Physical Journal C: Particles and Fields, 2021; 81(4):299-1-299-11 |
Publisher: | Springer |
Issue Date: | 2021 |
ISSN: | 1434-6044 1434-6052 |
Statement of Responsibility: | M. Antonello ... I. Bolognino ... A. G. Williams ... et al. |
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. We evaluated the activities of ²²⁶Ra and ²²⁸Th inside the crystal to be 5.9±0.6 μBq/kg and 1.6±0.3 μBq/kg, respectively, which would indicate a contamination from ²³⁸U and ²³²Th at part-per-trillion level. We measured an activity of 0.51 ± 0.02 mBq/kg due to ²¹⁰Pb out of equilibrium and a α quenching factor of 0.63 ± 0.01 at 5304 keV. We illustrate the analyses techniques developed to reject electronic noise in the lower part of the energy spectrum. A cut-based strategy and a multivariate approach indicated a rate, attributed to the intrinsic radioactivity of the crystal, of ∼1 count/day/kg/keV in the [5–20] keV region. |
Description: | Published online: 09 April 2021 |
Rights: | © The Author(s) 2021. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License,which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecomm ons.org/licenses/by/4.0/. Funded by SCOAP3. |
DOI: | 10.1140/epjc/s10052-021-09098-5 |
Grant ID: | http://purl.org/au-research/grants/arc/LE170100162 http://purl.org/au-research/grants/arc/LE16010080 http://purl.org/au-research/grants/arc/DP170101675 http://purl.org/au-research/grants/arc/LP150100705 http://purl.org/au-research/grants/arc/CE200100008 http://purl.org/au-research/grants/arc/LE190100196 |
Published version: | http://dx.doi.org/10.1140/epjc/s10052-021-09098-5 |
Appears in Collections: | Aurora harvest 4 Special Research Centre for the Subatomic Structure of Matter publications |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
hdl_130398.pdf | Published version | 3.87 MB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.