Abstract
The GERmanium Detector Array, GERDA, will search for neutrinoless double beta decay of 76Ge by operating bare high-purity germanium detectors, enriched in 76Ge, in liquid argon. To reduce the background to the required level below 10−3 cts/(keV·kg·y), it is necessary to employ active background-suppression techniques. Detectors based on the design of commercially available Broad-Energy Germanium (BEGe) detector are one of the two technologies included in research and development for the second phase of GERDA. BEGe detectors feature an enhanced capability to distinguish between an interaction of an electron from beta-decay and an interaction of a multiple-scattered photon inside the detector, via pulse-shape analysis. A GERDA Phase II prototype BEGe detector mounted in a low-mass holder was operated bare for the first time in liquid argon. The detector showed stable performance over more than one month, with an energy resolution of 1.9 keV (FWHM) at 1.3 MeV, and a low leakage current of ⩽ 20 pA. Periodic pulse-shape analysis checks were performed and the results are equal to those obtained with the same detector in a vacuum cryostat.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
