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.

Low background study of the neutrinoless double beta decay of 76-GE and upper limit for neutrino mass

1984 ◽  
Vol 138 (4) ◽  
pp. 301-303 ◽  
Author(s):  
A. Forster ◽  
H. Kwon ◽  
J.K. Markey ◽  
F. Boehm ◽  
H.E. Henrikson
Keyword(s):  
Beta Decay ◽  
Neutrino Mass ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Low Background ◽  
Upper Limit

scholarly journals The MAJORANA experiment: an ultra-low background search for neutrinoless double-beta decay

2012 ◽  
Vol 381 ◽  
pp. 012044 ◽  
Author(s):  
D G Phillips ◽  
E Aguayo ◽  
F T Avignone ◽  
H O Back ◽  
A S Barabash ◽  
...  
Keyword(s):  
Beta Decay ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Low Background

scholarly journals Low background measurement in CANDLES-III for studying the neutrinoless double beta decay of Ca48

2021 ◽  
Vol 103 (9) ◽  
Author(s):  
S. Ajimura ◽  
W. M. Chan ◽  
K. Ichimura ◽  
T. Ishikawa ◽  
K. Kanagawa ◽  
...  
Keyword(s):  
Beta Decay ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Low Background ◽  
Background Measurement

NEUTRINOLESS DOUBLE BETA DECAY EXPERIMENTS

2019 ◽  
pp. 32-39
Author(s):  
N.S. Rumyantseva ◽  
K.N. Gusev
Keyword(s):  
Standard Model ◽  
Beta Decay ◽  
Electroweak Interaction ◽  
Neutrinoless Double Beta Decay ◽  
New Physics ◽  
Lepton Number ◽  
Double Beta Decay ◽  
The Standard Model ◽  
New Generation ◽  
Lepton Number Violating

Neutrinoless double beta decay is a lepton number violating process which is not allowed in the Standard Model (SM) of the electroweak interaction. The discovery of this process will be an unambiguous confirmation of the existence of New Physics outside the SM. At this moment many experiments are being conducted aimed at searching for neutrinoless double beta decay on various isotopes (76Ge, 136Xe, 130Te, 100Mo, etc.). The paper presents a brief overview of the results of some current projects, such as GERDA, MAJORANA, KamLAND-Zen, EXO-200, CUORE and SuperNEMO, and plans for creating a new generation experiments.

scholarly journals Fabrication, characterization and analysis of a prototype high purity germanium detector for $$^{76}$$Ge-based neutrinoless double beta decay experiments

2021 ◽  
Vol 81 (1) ◽  
Author(s):  
A. Jany ◽  
M. Misiaszek ◽  
T. Mroz ◽  
K. Panas ◽  
G. Zuzel ◽  
...  
Keyword(s):  
Beta Decay ◽  
Pulse Shape ◽  
Germanium Detector ◽  
Background Level ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Pulse Shape Discrimination ◽  
Discovery Potential ◽  
Excellent Energy Resolution ◽  
Prototype Detector

AbstractExperiments searching for the neutrinoless double beta decay in $$^{76}$$ 76 Ge are currently achieving the lowest background level and, in connection with the excellent energy resolution of germanium detectors, they exhibit the best discovery potential for the decay. Expansion to a ton scale of the active target mass is presently considered – in this case on-site production of the detectors may be an option. In this paper we describe the fabrication and characterization procedures of a prototype detector with a small p+ contact, which enhances the abilities of the pulse shape discrimination – one of the most important tools for background reduction. Simulations of the shapes of pulses from the detector were carried out and tuned, taking the advantage of the fact that all the parameters of the Ge crystal, cryostat and of the spectroscopic chain were known. As a result, the pulse shape analyses performed on the simulated and measured data agree very well. The worked out method allows to optimize geometry and crystal parameters in terms of pulse shape analysis efficiency, before the actual production of the detectors.

scholarly journals Neutrinoless double beta decay experiments

2014 ◽  
Vol 31 ◽  
pp. 1460286 ◽  
Author(s):  
Alberto Garfagnini
Keyword(s):  
Beta Decay ◽  
Rare Decay ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Present Contribution ◽  
Intrinsic Nature ◽  
The Past ◽  
To Come ◽  
New Generation ◽  
Near Future

Neutrinoles double beta decay is the only process known so far able to test the neutrino intrinsic nature: its experimental observation would imply that the lepton number is violated by two units and prove that neutrinos have a Majorana mass components, being their own anti-particle. While several experiments searching for such a rare decay have been performed in the past, a new generation of experiments using different isotopes and techniques have recently released their results or are raking data and will provide new limits, should no signal be observed, in the next few years to come. The present contribution reviews the latest public results on double beta decay searches and gives an overview on the expected sensitivities of the experiments in construction which will be able to set stronger limits in the near future.

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