The research of 2β decay of 116Cd with enriched 116CdWO4 crystal scintillators

Danevich, F.A.; Georgadze, A. Sh.; Kobychev, V.; Kropivyansky, B. N.; Kuts, V. N.; Nikolaǐko, A. S.; Tretyak, V. I.; Zdesenko, Yu.G.

doi:10.1016/0370-2693(94)01528-k

Cited by 123 publications

(71 citation statements)

References 10 publications

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“…One of the most promising candidates for the 2β decay search is 116 Cd thanks to high 2β energy release (Q 2β = 2813.50 (13) keV [10]), large natural isotopic abundance (δ = 7.49% [11]), availability of enrichment by relatively cheap centrifugal method [12], and promising theoretical a e-mail: poda@kinr.kiev.ua estimations (see e.g. [5]).…”

Section: Introductionmentioning

confidence: 99%

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Search for 2βdecay of¹¹⁶Cd with the help of enriched¹¹⁶CdWO₄crystal scintillators

Poda

Barabash

Belli

et al. 2014

EPJ Web of Conferences

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Abstract. Cadmium tungstate crystal scintillators enriched in 116 Cd to 82% ( 116 CdWO 4 , total mass of ≈1.2 kg) are used to search for 2β decay of 116 Cd deep underground at the Gran Sasso National Laboratory of the INFN (Italy). The radioactive contamination of the 116 CdWO 4 crystals has been studied carefully to reconstruct the background of the detector. The measured half-life of 116 Cd relatively to 2ν2β decay is T 2ν2β 1/2 = [2.8 ± 0.05(stat.) ± 0.4(syst.)] × 10 19 yr, in agreement with the results of previous experiments. The obtained limit on the 0ν2β decay of 116 Cd (considering the data of the last 8696 h run with an advanced background 0.12(2) counts/yr/kg/keV in the energy interval 2.7 − 2.9 MeV) is T 1/2 ≥ 1.0 × 10 23 yr at 90% C.L. The sensitivity of the experiment to the 0ν2β process is lim T 1/2 = 3×10 23 yr at 90% C.L. over 5 years of the measurements and it can be advanced (by further reduction of the background by a factor 3−30) to the level of lim T 1/2 = (0.5−1.5)×10 24 yr for the same period of the data taking.

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Section: Introductionmentioning

confidence: 99%

“…[5]). Moreover, existence of excellent detector, cadmium tungstate (CdWO 4 ) scintillator, already used for 2β decay searches [13][14][15] allows to realize "source = detector" experiment with a high detection efficiency. In addition, detector based on cadmium tungstate scintillator has several features (see e.g.…”

Section: Introductionmentioning

confidence: 99%

Search for 2βdecay of¹¹⁶Cd with the help of enriched¹¹⁶CdWO₄crystal scintillators

Poda

Barabash

Belli

et al. 2014

EPJ Web of Conferences

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“…The continuous interest in these compounds lies in their excellent optical properties, which form the basis of their wide use as phosphors, laser materials, and scintillation detectors. [1][2][3] In this work, we evaluated the photoluminescence of two distinct CaMoO 4 ͑CM͒ and CaWO 4 ͑CW͒ powders prepared by the polymeric precursor method, i.e., the crystalline form ͑structurally ordered͒ and the other form ͑structurally disordered͒ before structural order was reached. We also investigated the electronic structure and optical properties using first-principles calculations based on the density functional theory ͑DFT͒.…”

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Mechanisms behind blue, green, and red photoluminescence emissions in CaWO4 and CaMoO4 powders

Campos

Simões

Longo

et al. 2007

Applied Physics Letters

103

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A combined experimental and theoretical study was conducted to analyze the photoluminescence (PL) properties of ordered and disordered CaWO4 (CW) and CaMoO4 (CM) powders. Two mechanisms were found to be responsible for photoluminescence emission in CW and CM powders. The first one, in the disordered powders, was caused by oxygen complex vacancies [MO3∙VOx], [MO3∙VO•] and [MO3∙VO••], where M=W or Mo, which leads to additional levels in the band gap. The second mechanism, in ordered powders, was caused by an intrinsic slight distortion of the [WO4] or [MoO4] tetrahedral in the short range.

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“…A detailed investigation of the measured spectra has been performed by using various data analysis strategies and Monte Carlo simulations. In particular, the technique of the time-amplitude analysis (described in details in [7]) has been used in order to estimate the 228 Th and 227 Ac ( 235 U family) activities. The pulse shape discrimination (PDS) capability of the ZnWO 4 scintillators has been considered in order to study the measured α spectra and the so called BiPo events.…”

Section: Znwo 4 Crystal Scintillatorsmentioning

confidence: 99%

Search for rare processes with ZnWO₄crystal scintillators

Belli

Bernabei

Cappella

et al. 2014

EPJ Web of Conferences

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Abstract. Radiopure ZnWO 4 crystal scintillators with mass (0.1-0.7 kg) have been developed and put in measurement in the Gran Sasso National Laboratories of the INFN to search for rare processes. The radioactive contamination of the crystals have been estimated and the double beta decay of zinc and tungsten isotopes was searched for, reaching a sensitivity at the level of 10 18 − 10 21 yr; in addition a new half-life limit on alpha transition of 183 W to the metastable excited level of 179 Hf has also been obtained. The achieved radiopurity of the ZnWO 4 crystals make them very promising detectors for ββ decay investigations while their anisotropic features make them very interesting detectors to investigate dark matter particles directionality.

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The research of 2β decay of 116Cd with enriched 116CdWO4 crystal scintillators

Cited by 123 publications

References 10 publications

Search for 2βdecay of¹¹⁶Cd with the help of enriched¹¹⁶CdWO₄crystal scintillators

Search for 2βdecay of¹¹⁶Cd with the help of enriched¹¹⁶CdWO₄crystal scintillators

Mechanisms behind blue, green, and red photoluminescence emissions in CaWO4 and CaMoO4 powders

Search for rare processes with ZnWO₄crystal scintillators

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The research of 2β decay of 116Cd with enriched 116CdWO4 crystal scintillators

Cited by 123 publications

References 10 publications

Search for 2βdecay of116Cd with the help of enriched116CdWO4crystal scintillators

Search for 2βdecay of116Cd with the help of enriched116CdWO4crystal scintillators

Mechanisms behind blue, green, and red photoluminescence emissions in CaWO4 and CaMoO4 powders

Search for rare processes with ZnWO4crystal scintillators

Contact Info

Product

Resources

About

Search for 2βdecay of¹¹⁶Cd with the help of enriched¹¹⁶CdWO₄crystal scintillators

Search for 2βdecay of¹¹⁶Cd with the help of enriched¹¹⁶CdWO₄crystal scintillators

Search for rare processes with ZnWO₄crystal scintillators