First results of the experiment to search for 2β decay of106Cd with106CdWO4crystal scintillator in coincidence with four crystals HPGe detector

Tretyak, V. I.; Belli, P.; Bernabei, R.; Brudanin, V.; Cappella, F.; Caracciolo, V.; Cerulli, R.; Chernyak, D.; Danevich, F.A.; d’Angelo, S.; Incicchitti, A.; Laubenstein, M.; Mokina, V.M.; Poda, D.V.; Polischuk, O. G.; Tupitsyna, I.A.

doi:10.1051/epjconf/20136501004

Cited by 5 publications

(3 citation statements)

References 21 publications

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“…On the basis of obtained high purity Greek lead the high-quality scintillation single crystal of tungstate lead PbWO 4 was grown. The crystal was successfully used as an optical fiber in a low-background experiment to search for double beta decay 106 Cd with the help of scintillator 106 CdWO 4 in an underground laboratory in Gran Sasso, Italy [20].…”

Section: Resultsmentioning

confidence: 99%

Refining Ancient Lead by Vacuum Distillation

et al. 2017

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A complex method for refining lead by distillation in vacuum has been described. A brief comparative description of different methods of lead refining was submitted. Analysis of different methods showed that to increase the efficiency of lead deep cleaning the development of complex refining processes is required. The computational studies of the behavior of impurity elements in the ancient lead are performed. The ideal coefficients of impurities separation αi are calculated at lead distillation temperatures. The range of volatile and nonvolatile impurities was detected by magnitude αi in lead. Performed computational studies of the impurity elements behavior in lead formed the basis for developing an integrated method of deep refining of ancient lead. To implement this approach the special distillation device was developed, and the procedure of deep purification of lead was described.The results of the study of the deep refining ancient lead have been demonstrated. The cleaning high efficiency of the proposed approach, combined with high performance and yield of the suitable product, was shown. A pilot batch of ancient lead containing base metal > 99.998 wt. % suitable for growing high quality scintillation crystals PbWO4 and PbMoO4 has been produced.

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Section: Resultsmentioning

confidence: 99%

Refining Ancient Lead by Vacuum Distillation

et al. 2017

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“…The final result of this stage, after 13085 h of data taking, with the 106 CdWO 4 scintillation detector operated in coincidence (anticoincidence) with the four crystals HPGe γ detector, further improved the lower limits of several DBD+ [82]. The preliminary results of the experiment have been presented in conference proceedings [81,[226][227][228].…”

Section: Transitionmentioning

confidence: 94%

Status and Perspectives of 2ϵ, ϵβ+ and 2β+ Decays

2021

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This paper reviews the main experimental techniques and the most significant results in the searches for the 2ϵ, ϵβ+ and 2β+ decay modes. Efforts related to the study of these decay modes are important, since they can potentially offer complementary information with respect to the cases of 2β− decays, which allow a better constraint of models for the nuclear structure calculations. Some positive results that have been claimed will be mentioned, and some new perspectives will be addressed shortly.

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“…Here we report the final results of the experiment with the 106 CdWO 4 scintillation detector operated in coincidence (anticoincidence) with the four crystals HPGe γ detector. Preliminary results of the experiment were presented in conference proceedings [29,30,31,32].…”

Section: Introductionmentioning

confidence: 99%

Search for $2β$ decay of $^{106}$Cd with enriched $^{106}$CdWO$_4$ crystal scintillator in coincidence with four HPGe detectors

Belli,

Bernabei,

Brudanin

et al. 2016

Preprint

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A radiopure cadmium tungstate crystal scintillator, enriched in 106 Cd to 66%, with mass of 216 g ( 106 CdWO 4 ), was used to search for double beta decay processes in 106 Cd in coincidence with four ultra-low background high purity germanium detectors in a single cryostat. New improved limits on the double beta processes in 106 Cd have been set on the level of 10 20 − 10 21 yr after 13085 h of data taking. In particular, the half-life limit on the two neutrino electron capture with positron emission, T 2νεβ + 1/2 ≥ 1.1 × 10 21 yr, has reached the region of theoretical predictions. With this half-life limit the effective nuclear matrix element for the 2νεβ + decay is bounded as M 2νεβ + ef f ≤ 1.1. The resonant neutrinoless double electron captures to the 2718 keV, 2741 keV and 2748 keV excited states of 106 Pd are restricted at the level of T 1/2 ≥ (8.5 × 10 20 − 1.4 × 10 21 ) yr.

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First results of the experiment to search for 2β decay of¹⁰⁶Cd with¹⁰⁶CdWO₄crystal scintillator in coincidence with four crystals HPGe detector

Cited by 5 publications

References 21 publications

Refining Ancient Lead by Vacuum Distillation

Refining Ancient Lead by Vacuum Distillation

Status and Perspectives of 2ϵ, ϵβ+ and 2β+ Decays

Search for $2β$ decay of $^{106}$Cd with enriched $^{106}$CdWO$_4$ crystal scintillator in coincidence with four HPGe detectors

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