Search for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>2</mml:mn><mml:mi>β</mml:mi></mml:math>decay of cadmium and tungsten isotopes: Final results of the Solotvina experiment

Danevich, F.A.; Georgadze, A. Sh.; Kobychev, V.; Kropivyansky, B. N.; Nikolaǐko, A. S.; Ponkratenko, O. A.; Tretyak, V.I.; Zdesenko, S. Yu.; Zdesenko, Yu.G.; Bizzeti, P. G.; Fazzini, T.; Maurenzig, P. R.

doi:10.1103/physrevc.68.035501

Cited by 180 publications

(170 citation statements)

References 53 publications

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“…according to the Feldman-Cousins procedure [32]. Substituting all parameters, one can obtain the limit T 0ν2β 1/2 ≥ 1.0 × 10 23 yr at 90% C.L., which is on the level of the Solotvina experiment [15] (see Table 3). …”

Section: Resultsmentioning

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%

“…In addition, detector based on cadmium tungstate scintillator has several features (see e.g. [15,16]) which are very important for such kind of studies: low level of intrinsic radioactivity, good scintillation properties, particle identification ability, relatively low cost of the scintillation material, stability for long term operation.…”

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: Resultsmentioning

confidence: 99%

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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“…6, a) and specification of the PMT (XP2412) with bialkali (blue-green sensitive) photocathode. For the high quality PMT with green-enhanced (RbCs) photocathode (EMI D724KFL, serial #13) produced by THORN EMI for the Solotvina experiment [9], we have obtained the value QE = 0.17.…”

Section: Light Yieldmentioning

confidence: 99%

“…However, this process still remains unobserved, and only half-life limits for 0ν2β mode were obtained (see, e.g., reviews [1]) 1 One of the most sensitive 2β experiments has been performed in the Solotvina Underground Laboratory [7] by the Kiev-Firenze collaboration with the help of enriched cadmium tungstate ( 116 CdWO 4 ) crystal scintillators [8,9]. The half-life limit on 0ν2β decay of 116 Cd was set as T 1/2 ≥ 1.7 × 10 23 yr at 90% C.L., which corresponds to an upper bound on the effective Majorana neutrino mass m ν ≤ 1.7 eV [9]. This result is among the strongest world-wide restrictions on m ν (in addition to the bounds obtained in experiments with 76 Ge, 82 Se, 100 Mo, 130 Te, and 136 Xe).…”

Section: Introductionmentioning

confidence: 99%

Further study of CdWO4 crystal scintillators as detectors for high sensitivity experiments: Scintillation properties and pulse-shape discrimination

Bardelli

Bini

Bizzeti

et al. 2006

Nuclear Instruments and Methods in Physics Research Section A:

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Energy resolution, light yield, non-proportionality in the scintillation response, α/β ratio, pulse shape for γ rays and α particles were studied with CdWO 4 crystal scintillators. Some indication for a difference in the emission spectra for γ rays and α particles was observed. No dependence of CdWO 4 pulse shape on emission spectrum wavelengths under laser, α particles and γ ray excitation was observed. Dependence of scintillation pulse shape for γ quanta and α particles and pulse-shape discrimination ability on temperature was measured in the range of 0 − 24 • C.

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Growth and characterization of isotopically enriched ⁴⁰Ca¹⁰⁰MoO₄ single crystals for rare event search experiments

Аленков

Бузанов

Khanbekov

et al. 2011

Cryst. Res. Technol.

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Calcium molybdate is considered as a very promising scintillator material for experimental studies of rare processes. This paper reports on the production and characterization of a 40 Ca 100MoO 4 scintillator. Using the Czochralski technique, a crystal of high optical quality with total mass 0.55 kg, 42 mm diameter (minimum) and 53 mm 1ength of the cylindrical section was produced from isotopically enriched raw materials, containing 96.1% of 100 Mo and 99.964% of 40 Ca. To satisfy the requirement of low intrinsic radioactivity the purity of the materials was monitored at different stages of the production process and it is shown that the concentration of 238 U and 232 Th in the final crystal does not exceed 0.05 ppb. The scintillation properties of 40 Ca 100 MoO 4 were measured over the 8 -300 K temperature range and it is found that the light yield of the 40 Ca 100MoO 4 crystal is very similar to that of the CaMoO 4 reference scintillator.

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Search for2βdecay of cadmium and tungsten isotopes: Final results of the Solotvina experiment

Cited by 180 publications

References 53 publications

Search for 2βdecay of¹¹⁶Cd with the help of enriched¹¹⁶CdWO₄crystal scintillators

Search for 2βdecay of¹¹⁶Cd with the help of enriched¹¹⁶CdWO₄crystal scintillators

Further study of CdWO4 crystal scintillators as detectors for high sensitivity experiments: Scintillation properties and pulse-shape discrimination

Growth and characterization of isotopically enriched ⁴⁰Ca¹⁰⁰MoO₄ single crystals for rare event search experiments

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Search for2βdecay of cadmium and tungsten isotopes: Final results of the Solotvina experiment

Cited by 180 publications

References 53 publications

Search for 2βdecay of116Cd with the help of enriched116CdWO4crystal scintillators

Search for 2βdecay of116Cd with the help of enriched116CdWO4crystal scintillators

Further study of CdWO4 crystal scintillators as detectors for high sensitivity experiments: Scintillation properties and pulse-shape discrimination

Growth and characterization of isotopically enriched 40Ca100MoO4 single crystals for rare event search experiments

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

Growth and characterization of isotopically enriched ⁴⁰Ca¹⁰⁰MoO₄ single crystals for rare event search experiments