Background Suppression Using Pulse Shape Analysis with a BEGe Detector for Neutrinoless Double Beta Decay Search with GERDA

2009 ◽  
Author(s):  
Dušan Budjáš ◽  
Oleg Chkvorets ◽  
Stefan Schönert ◽  
Marvin L. Marshak
Keyword(s):  
Beta Decay ◽  
Shape Analysis ◽  
Pulse Shape ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Background Suppression ◽  
Pulse Shape Analysis

APPLICATION OF MODERN STRUCTURAL MATERIALS, METHODS AND DETECTORS FOR LOW-BACKGROUND EXPERIMENTS

2020 ◽  
pp. 29-35
Author(s):  
N.S. Rumyantseva ◽  
K.N. Gusev
Keyword(s):  
Beta Decay ◽  
Background Level ◽  
Structural Materials ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Background Suppression ◽  
Accelerator Physics ◽  
Low Background ◽  
Structural Parts ◽  
New Generation

Good examples of the key tasks of modern non-accelerator physics are the searches for dark matter and neutrinoless double beta decay. The essential requirement for such an experiment is the requirement of a minimal background level. The ways to reduce it are quite obvious and widely used in the ongoing experiments. So, the experiments are located in the underground laboratories, a careful selection of structural materials is carried out, and various techniques for active background suppression are used. However, in order to advance in new generation projects in addition to a serious increase in the detector mass, the significant reduction of the background level (which is already pretty low) is required. Very important irremovable background sources are the structural materials close to the detector(s). In this regard, it is extremely important not only to constantly search for new low-background materials, but also to ensure that radioactive contaminants cannot be introduced at the stage of the required parts production. In this article the results of the successful using of structural parts produced by modern methods from novel low-background materials during the preparation of the new generation ultra-low-background experiment searching for neutrinoless double beta decay are presented.

scholarly journals RESULTS ON NEUTRINOLESS DOUBLE-BETA DECAY FROM GERDA PHASE I

2014 ◽  
Vol 29 (01) ◽  
pp. 1430001 ◽  
Author(s):  
CARLA MACOLINO ◽  
Keyword(s):  
Energy Spectrum ◽  
Phase I ◽  
Beta Decay ◽  
Half Life ◽  
Pulse Shape ◽  
Germanium Detector ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Recent Claim ◽  
Detection Principle

The GERmanium Detector Array, GERDA, is designed to search for neutrinoless double-beta (0νββ) decay of 76 Ge and it is installed in the Laboratori Nazionali del Gran Sasso (LNGS) of INFN, Italy. In this review, the detection principle and detector setup of GERDA are described. Also, the main physics results by GERDA Phase I, are discussed. They include the measurement of the half-life of 2νββ decay, the background decomposition of the energy spectrum and the techniques for the discrimination of the background, based on the pulse shape of the signal. In the last part of this review, the estimation of a limit on the half-life of 0νββ ([Formula: see text] at 90% C.L.) and the comparison with previous results are discussed. GERDA data from Phase I strongly disfavor the recent claim of 0νββ discovery, based on data from the Heidelberg–Moscow experiment.

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