The Gerda experiment for the search of 0νββ decay in 76Ge

Ackermann, K. H.; Agostini, M.; Allardt, M.; Altmann, M.; Andreotti, E.; Bakalyarov, A. M.; Balata, M.; Барабанов, И. Р.; Heider, Marik Barnabé; Barros, N.; Baudis, L.; Bauer, C.; Becerici-Schmidt, N.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode, T.; Brudanin, V.; Brugnera, R.; Budjáš, D.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; Chkvorets, O.; Cossavella, F.; D’Andragora, Alessio; Demidova, É. V.; Denisov, A. N.; Vacri, A. di; Domula, A.; Egorov, V.; Falkenstein, R.; Ferella, A. D.; Freund, K.; Froborg, F.; Frodyma, N.; Gangapshev, A. M.; Garfagnini, A.; Gasparro, Joël; Gazzana, S.; Orduña, R. González de; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Guthikonda, K. K.; Hampel, W.; Hegai, A.; Heisel, M.; Hemmer, S.; Heusser, G.; Hofmann, W.; Hult, M.; Инжечик, Л. В.; Ioannucci, L.; Csáthy, J. Janicskó; Jochum, J.; Junker, M.; Kankanyan, R.; Kianovsky, S.; Kihm, T.; Kiko, J.; Kirpichnikov, I. V.; Kirsch, A.; Klimenko, A.; Knapp, M.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kroeninger, K.; Kusminov, V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Lenz, Daniel; Liao, H.; Lindner, M.; Lippi, I.; Liu, Jun; Liu, X.; Lubashevskiy, A.; Лубсандоржиев, Б.; Machado, A. A.; Majorovits, B.; Maneschg, W.; Marissens, G.; Mayer, Sabine; Meierhofer, G.; Nemchenok, I.; Niedermeier, L.; Nisi, S.; Oehm, J.; O’Shaughnessy, C.; Pandola, L.; Peiffer, P.; Pelczar, K.; Pullia, A.; Riboldi, S.; Ritter, F.; Alvarez, C. Rossi; Sada, Cinzia; Salathe, M.; Schmitt, C.; Schönert, S.; Schreiner, J.; Schubert, J.; Schulz, O.; Schwan, U.; Schwingenheuer, B.; Seitz, H.; Shevchik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stančo, L.; Stelzer, Franz; Strecker, H.; Tarka, M.; Trunk, U.; Ur, C. A.; Vasenko, A. A.; Vogt, S.; Volynets, O.; Sturm, K. von; Wagner, Victoria; Walter, Michael; Wegmann, A.; Wójcik, Marcin; Yanovich, E.; Zavarise, P.; Zhitnikov, I.; Жуков, С. В.; Zinatulina, D.; Zuber, Κ.; Zuzel, G.

doi:10.1140/epjc/s10052-013-2330-0

Cited by 217 publications

(178 citation statements)

References 86 publications

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“…Experiments like Gerda [1,2] or LEGEND [20] use (will use) a large numbers of such detectors. A clear advantage is the stability (clear separation of MSEs and SSEs -see Fig.…”

Section: Discussionmentioning

confidence: 99%

“…multiple Compton scatterings, have several interaction sites separated by a distance of about 1 cm. The differences and discrimination between SSEs and MSEs is of primary interest for experiments like Gerda [1,2] looking for the neutrinoless double beta (0νββ) decay with application of the High Purity Germanium (HPGe) detectors. Events from the hypothetical 0νββ decay would ionize the detector's active volume by means of two electrons (with a range of less than 1 mm in germanium) and therefore belong to the first category.…”

Section: Introductionmentioning

confidence: 99%

“…The SSEs are of background type, because they are mostly single Compton scattered events with the scattered photon escaping the crystal, while the full energy peaks (FEPs) registered by the detector (and used to evaluate the activities of radionuclides) contain mainly MSEs. 1 The developed procedure shall therefore make peaks more distinguished by reducing the flat Compton continuum and make possible to evaluate peaks from radioisotopes, which would be otherwise under spectrometer's minimal detectable activity (sensitivity).…”

Section: Introductionmentioning

confidence: 99%

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Improving sensitivity of a BEGe-based high-purity germanium spectrometer through pulse shape analysis

et al. 2018

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We performed Pulse Shape Analysis to separate single-scattered gamma energy deposition events from multiple-scattered photons in a high-sensitivity γ -ray spectrometer. The spectrometer is based on a Broad Energy High Purity Germanium detector and the developed technique uses multivariate analysis by an application of the Multi-Layer Perceptron Neural Network. A very good separation of the single-site-and multi-site events was achieved leading to a significant reduction of the background level of the investigated spectrometer -the double escape peak, rich in singlesite events, was reduced by 95%, while the full energy peaks lost at most 25% of their counts. The peak to Compton ratio, calculated for the 2614.5 keV gamma line from 208 Tl, was improved by 114.3%.

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“…Experiments like Gerda [1,2] or LEGEND [20] use (will use) a large numbers of such detectors. A clear advantage is the stability (clear separation of MSEs and SSEs -see Fig.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improving sensitivity of a BEGe-based high-purity germanium spectrometer through pulse shape analysis

et al. 2018

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“…GERDA-I [21], GERDA-II [22], and Majorana Demonstrator [23], of which GERDA-II has the best limit T 0ν 1/2 ≥ 5.2 × 10 25 yr [24]. There are plans to use 76 be used ever yet but has already been chosen by LUCIFER [32] and SuperNEMO [33].…”

Section: Introductionmentioning

confidence: 99%

Extracting Majorana properties from strong bounds on neutrinoless double beta decay

Lindner

2017

Phys. Rev. D

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Assuming that neutrinos are Majorana particles, we explore what information can be inferred from future strong limits (i.e. non-observation) for neutrinoless double beta decay. Specifically we consider the case where the mass hierarchy is normal and the different contributions to the effective mass m ee partly cancel. We discuss how this fixes the two Majorana CP phases simultaneously from the Majorana Triangle and how it limits the lightest neutrino mass m 1 within a narrow window. The two Majorana CP phases are in this case even better determined than in the usual case for larger m ee . We show that the uncertainty in these predictions can be significantly reduced by the complementary measurement of reactor neutrino experiments, especially the medium baseline version JUNO/RENO-50. We also estimate the necessary precision on m ee to infer non-trivial Majorana CP phases and the upper limit m ee 1 meV sets a target for the design of future neutrinoless double beta decay experiments. *

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“…Foreseen are measurements of the ionic properties in cryogenic liquids, being highly relevant for such setups as DarkSide [3] (LAr TPC) or Gerda [4] (HPGe in LAr), where energetic alpha or beta decays present in the 222 Rn products entering the experiments' active volumes may mimic the signal of interest for these experiments. Properties of the ionized 222 Rn daughters deduced from the conducted measurements are therefore to be outlined, assuming no isotopic dependence of the physical properties reported.…”

Section: Discussionmentioning

confidence: 99%

Mobility and lifetime of 220Rn daughters

Pelczar

2018

AIP Conference Proceedings

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Abstract. A method of mobility and ionic lifetime measurement of alpha emitters from the 228 Th / 220 Rn decay chain is presented. The choice of 220 Rn chain over 222 Rn is based on the fact that the shorter nuclear lifetime of 220 Rn and 216 Po allows for easy determination of their mobility and ionic lifetime in the setup described, assuming no isotopic impact on the investigated physical properties. A typical mobility of positively charged 216 Po measured is on the order of 0.5 cm 2 s −1 V −1 , while the ionic lifetime is approximately >1 s (and is expected to be much longer for ultra-pure gases).

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The Gerda experiment for the search of 0νββ decay in 76Ge

Cited by 217 publications

References 86 publications

Improving sensitivity of a BEGe-based high-purity germanium spectrometer through pulse shape analysis

Improving sensitivity of a BEGe-based high-purity germanium spectrometer through pulse shape analysis

Extracting Majorana properties from strong bounds on neutrinoless double beta decay

Mobility and lifetime of 220Rn daughters

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