Production of 82Se enriched Zinc Selenide (ZnSe) crystals for the study of neutrinoless double beta decay

Dafinei, I.; Nagorny, S.S.; Pirro, S.; Cardani, L.; Clemenza, M.; Ferroni, F.; Laubenstein, M.; Nisi, S.; Pattavina, L.; Schäeffner, K.; Vacri, M. L. Di; Boyarintsev, A.; Breslavskii, I.; Galkin, S. N.; Lalayants, A. I.; Rybalka, I. A.; Zvereva, V.; Enculescu, Monica

doi:10.1016/j.jcrysgro.2017.06.013

Cited by 50 publications

(45 citation statements)

References 32 publications

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“…The Se powder was enriched from its natural abundance to 95% [38], and embedded in 24 Zn 82 Se crystals (plus 2 natural ZnSe crystals) [39]. The total mass of the 24 Zn 82 Se crystals amounts to 9.65 kg (5.13 kg of 82 Se), while the two natural crystals have a total mass of about 850 g (42 g of 82 Se).…”

Section: The Cupid-0 Detectormentioning

confidence: 99%

Analysis of cryogenic calorimeters with light and heat read-out for double beta decay searches

et al. 2018

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The suppression of spurious events in the region of interest for neutrinoless double beta decay will play a major role in next generation experiments. The background of detectors based on the technology of cryogenic calorimeters is expected to be dominated by particles, that could be disentangled from double beta decay signals by exploiting the difference in the emission of the scintillation light. CUPID-0, an array of enriched ZnSe scintillating calorimeters, is the first large mass demonstrator of this technology. The detector started data-taking in 2017 at the Laboratori Nazionali del Gran Sasso with the aim of proving that dual read-out of light and heat allows for an efficient suppression of the background. In this paper we describe the software tools we developed for the analysis of scintillating calorimeters and we demonstrate that this technology allows to reach an unprecedented background for cryogenic calorimeters.

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Section: The Cupid-0 Detectormentioning

confidence: 99%

Analysis of cryogenic calorimeters with light and heat read-out for double beta decay searches

et al. 2018

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“…96 The Zn 82 Se crystal growth has been performed by the Bridgman method from the powder synthesized from zinc and enriched selenium both purified by vacuum distillation. 97 Due to the complexity of the growth process, the Zn 82 Se ingots were grown by single crystallization. The irrecoverable loss of enriched Se has been optimized to be around 4%.…”

Section: Zn 82 Sementioning

confidence: 99%

Low background techniques in bolometers for double-beta decay search

Poda

Giuliani

2017

Int. J. Mod. Phys. A

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Bolometers are low temperature particle detectors with high energy resolution and detection efficiency. Some types of bolometric detectors are also able to perform an efficient particle identification. A wide variety of radiopure dielectric and diamagnetic materials makes the bolometric technique favorable for applications in astroparticle physics. In particular, thanks to their superior performance, bolometers play an important role in the world-wide efforts on searches for neutrinoless double-beta decay. Such experiments strongly require an extremely low level of the backgrounds that can easily mimic the process searched for. Here we overview recent progress in the development of low background techniques for bolometric double-beta decay searches.Comment: Review, a part of IJMPA Special Issue on Low Background Technique

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“…Therefore, the production of crystals scintillators or samples for HPGe γ spectrometry from isotopically enriched materials is requested for the next generation experiments aiming at the discovery of α decay half-lives at the level of T 1/2 ∼ 10 19 − 10 26 yr. It should be noted that the production of crystal scintillators from enriched isotopes is already well developed for double beta decay experiments (see the review [290] and the original works [291,292,293,294,295,296,297]).…”

Section: Prospects For Future Experiments and Conclusionmentioning

confidence: 99%

Experimental searches for rare alpha and beta decays

et al. 2019

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The current status of the experimental searches for rare alpha and beta decays is reviewed. Several interesting observations of alpha and beta decays, previously unseen due to their large half-lives (10 15 − 10 20 yr), have been achieved during the last years thanks to the improvements in the experimental techniques and to the underground locations of experiments that allows to suppress backgrounds. In particular, the list includes first observations of alpha decays of 151 Eu, 180 W (both to the ground state of the daughter nuclei), 190 Pt (to excited state of the daughter nucleus), 209 Bi (to the ground and excited states of the daughter nucleus). The isotope 209 Bi has the longest known half-life of T 1/2 ≈ 10 19 yr relatively to alpha decay. The beta decay of 115 In to the first excited state of 115 Sn (Eexc = 497.334 keV), recently observed for the first time, has the Q β value of only (147 ± 10) eV, which is the lowest Q β value known to-date. Searches and investigations of other rare alpha and beta decays ( 48 Ca, 50 V, 96 Zr, 113 Cd, 123 Te, 178m2 Hf, 180m Ta and others) are also discussed.

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Production of 82Se enriched Zinc Selenide (ZnSe) crystals for the study of neutrinoless double beta decay

Abstract: High purity Zinc Selenide (ZnSe)

Cited by 50 publications

References 32 publications

Analysis of cryogenic calorimeters with light and heat read-out for double beta decay searches

Analysis of cryogenic calorimeters with light and heat read-out for double beta decay searches

Low background techniques in bolometers for double-beta decay search

Experimental searches for rare alpha and beta decays

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