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Title: Rejection of Alpha Surface Background in Non-scintillating Bolometric Detectors: The ABSuRD Project

Due to their excellent energy resolution values and the vast choice of possible materials, bolometric detectors are currently widely used in the physics of rare events. A limiting aspect for bolometers rises from their inability to discriminate among radiation types or surface from bulk events. It has been demonstrated that the main limitation to sensitivity for purely bolometric detectors is represented by surface alpha contaminations, causing a continuous background that cannot be discriminated. A new scintillation based technique for the rejection of surface alpha background in non- scintillating bolometric experiments is proposed in this work. The idea is to combine a scintillating and a high sensitivity photon detector with a non- scintillating absorber. Finally, we present results showing the possibility to reject events due to alpha decay at or nearby the surface of the crystal.
Authors:
 [1] ;  [1] ;  [2] ;  [2] ;  [3] ;  [2] ;  [1] ;  [4]
  1. Istituto Nazionale di Fisica Nucleare (INFN), Milano (Italy)
  2. Istituto Nazionale di Fisica Nucleare (INFN), Assergi, L'aquila (Italy). Lab. Nazionali del Gran Sasso (INFN-LNGS)
  3. Istituto Nazionale di Fisica Nucleare (INFN), Assergi, L'aquila (Italy). Lab. Nazionali del Gran Sasso (INFN-LNGS); Univ. of L'Aquila, L'Aquila (Italy). Dept. of Physical and Chemical Sciences
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Report Number(s):
BNL-113261-2016-JA
Journal ID: ISSN 0022-2291; R&D Project: CO001; KB0401022
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
Journal of Low Temperature Physics
Additional Journal Information:
Journal Volume: 184; Journal Issue: 3-4; Journal ID: ISSN 0022-2291
Publisher:
Plenum Press
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Thermal detectors; Scintillation; Surface background
OSTI Identifier:
1336229