V. I. Umatov
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View article: Cryogenic light detectors with thermal signal amplification for $0νββ$ search experiments
Cryogenic light detectors with thermal signal amplification for $0νββ$ search experiments Open
As a step towards the realization of cryogenic-detector experiments to search for neutrinoless double-beta decay (such as CROSS, BINGO, and CUPID), we investigated a batch of 10 Ge light detectors (LDs) assisted by Neganov-Trofimov-Luke (N…
View article: The impact of helium exposure on the PMTs of the SuperNEMO experiment
The impact of helium exposure on the PMTs of the SuperNEMO experiment Open
The performance of Hamamatsu 8” photomultiplier tubes (PMTs) of the type used in the SuperNEMO neutrinoless double-beta decay experiment (R5912-MOD), is investigated as a function of exposure to helium (He) gas. Two PMTs were monitored for…
View article: Double-beta decay of $^{150}$Nd to excited levels of $^{150}$Sm
Double-beta decay of $^{150}$Nd to excited levels of $^{150}$Sm Open
The $2\nu2β$ decay of $^{150}$Nd to the first excited 740.5 keV $0^{+}_{1}$ level of $^{150}$Sm was measured over 5.845 yr with the help of a four-crystal low-background HPGe $γ$ spectrometry system in the underground low-background labora…
View article: Development of large-volume <sup>130</sup>TeO<sub>2</sub> bolometers for the CROSS 2β decay search experiment
Development of large-volume <sup>130</sup>TeO<sub>2</sub> bolometers for the CROSS 2β decay search experiment Open
We report on the development of thermal detectors based on large-size tellurium dioxide crystals (45 × 45 × 45 mm), containing tellurium enriched in 130 Te to about 91%, for the CROSS double-beta decay experiment. A powder used for the cry…
View article: A novel mechanical design of a bolometric array for the CROSS double-beta decay experiment
A novel mechanical design of a bolometric array for the CROSS double-beta decay experiment Open
The CROSS experiment will search for neutrinoless double-beta decay using a specific mechanical structure to hold thermal detectors. The design of the structure was tuned to minimize the background contribution, keeping an optimal detector…
View article: Development of large-volume $^{130}$TeO$_2$ bolometers for the CROSS $2β$ decay search experiment
Development of large-volume $^{130}$TeO$_2$ bolometers for the CROSS $2β$ decay search experiment Open
We report on the development of thermal detectors based on large-size tellurium dioxide crystals (45x45x45 mm), containing tellurium enriched in $^{130}$Te to about 91%, for the CROSS double-beta decay experiment. A powder used for the cry…
View article: A novel mechanical design of a bolometric array for the CROSS double-beta decay experiment
A novel mechanical design of a bolometric array for the CROSS double-beta decay experiment Open
The CROSS experiment will search for neutrinoless double-beta decay using a specific mechanical structure to hold thermal detectors. The design of the structure was tuned to minimize the background contribution, keeping an optimal detector…
View article: Searching for Beyond the Standard Model physics using the improved description of $^{100}$Mo $2νββ$ decay spectral shape with CUPID-Mo
Searching for Beyond the Standard Model physics using the improved description of $^{100}$Mo $2νββ$ decay spectral shape with CUPID-Mo Open
The current experiments searching for neutrinoless double-$β$ ($0νββ$) decay also collect large statistics of Standard Model allowed two-neutrino double-$β$ ($2νββ$) decay events. These can be used to search for Beyond Standard Model (BSM)…
View article: Test of <sup>116</sup>CdWO<sub>4</sub> and Li<sub>2</sub>MoO<sub>4</sub> scintillating bolometers in the CROSS underground facility with upgraded detector suspension
Test of <sup>116</sup>CdWO<sub>4</sub> and Li<sub>2</sub>MoO<sub>4</sub> scintillating bolometers in the CROSS underground facility with upgraded detector suspension Open
In preparation for the CROSS experiment to search for double-beta (2 β ) decay of 100 Mo, we upgraded a low-background facility at the Canfranc underground laboratory (Spain) by installing a magnetic damping-based detector suspension insid…
View article: The background model of the CUPID-Mo $$0\nu \beta \beta $$ experiment
The background model of the CUPID-Mo $$0\nu \beta \beta $$ experiment Open
CUPID-Mo, located in the Laboratoire Souterrain de Modane (France), was a demonstrator for the next generation $$0\nu \beta \beta $$ decay experiment, CUPID. It consisted of an array of 20 enriched Li $$_{2}$$ $$^{100}$$ MoO $$…
View article: Measurement of the $2νββ$ decay rate and spectral shape of $^{100}$Mo from the CUPID-Mo experiment
Measurement of the $2νββ$ decay rate and spectral shape of $^{100}$Mo from the CUPID-Mo experiment Open
Neutrinoless double beta decay ($0νββ$) is a yet unobserved nuclear process which would demonstrate Lepton Number violation, a clear evidence of beyond Standard Model physics. The process two neutrino double beta decay ($2νββ)$ is allowed …
View article: Li2100deplMoO4 Scintillating Bolometers for Rare-Event Search Experiments
Li2100deplMoO4 Scintillating Bolometers for Rare-Event Search Experiments Open
We report on the development of scintillating bolometers based on lithium molybdate crystals that contain molybdenum that has depleted into the double-β active isotope 100Mo (Li2100deplMoO4). We used two Li2100deplMoO4 cubic samples, each …
View article: New measurement of double beta decays of $^{100}$Mo to excited states of $^{100}$Ru with the CUPID-Mo experiment
New measurement of double beta decays of $^{100}$Mo to excited states of $^{100}$Ru with the CUPID-Mo experiment Open
The CUPID-Mo experiment, located at Laboratoire Souterrain de Modane (France), was a demonstrator experiment for CUPID. It consisted of an array of 20 Li$_2^{100}$MoO$_4$ (LMO) calorimeters each equipped with a Ge light detector (LD) for p…
View article: The neutrinoless double beta decay CROSS experiment: demonstrator with surface sensitive bolometers
The neutrinoless double beta decay CROSS experiment: demonstrator with surface sensitive bolometers Open
The CROSS experiment is proposing to use a new technology of surface sensitive bolometers for low-background neutrinoless double beta decay searches. Efficient rejection of surface α and β events will allow to reach background in the regio…
View article: Measurement of the distribution of ^207Bi depositions on calibration sources for SuperNEMO
Measurement of the distribution of ^207Bi depositions on calibration sources for SuperNEMO Open
The SuperNEMO experiment will search for neutrinoless double-beta decay ($0νββ$), and study the Standard-Model double-beta decay process ($2νββ$). The SuperNEMO technology can measure the energy of each of the electrons produced in a doubl…
View article: Phonon-mediated crystal detectors with metallic film coating capable of rejecting <i>α</i> and <i>β</i> events induced by surface radioactivity
Phonon-mediated crystal detectors with metallic film coating capable of rejecting <i>α</i> and <i>β</i> events induced by surface radioactivity Open
Phonon-mediated particle detectors based on single crystals and operated at millikelvin temperatures are used in rare-event experiments for neutrino physics and dark-matter searches. In general, these devices are not sensitive to the parti…
View article: Search for triple and quadruple beta decay of <sup>150</sup>Nd using low-background HPGe detector
Search for triple and quadruple beta decay of <sup>150</sup>Nd using low-background HPGe detector Open
Triple beta decay of 150 Nd to the ground and excited states of 150 Eu and quadruple beta decay of 150 Nd to the excited states of 150 Gd have been studied using a 400 cm 3 low-background HPGe detector. A half-life limit for the quadruple …
View article: Precise measurement of $2\nu \beta \beta $ decay of $^{100}$Mo with the CUPID-Mo detection technology
Precise measurement of $2\nu \beta \beta $ decay of $^{100}$Mo with the CUPID-Mo detection technology Open
We report the measurement of the two-neutrino double-beta (2νββ) decay of $^{100}$Mo to the ground state of $^{100}$Ru using lithium molybdate (Li$_{2}$$^{100}$MoO$_{4}$) scintillating bolometers. The detectors were developed for the CUPID…
View article: Detailed studies of $$^{100}$$Mo two-neutrino double beta decay in NEMO-3
Detailed studies of $$^{100}$$Mo two-neutrino double beta decay in NEMO-3 Open
The full data set of the NEMO-3 experiment has been used to measure the half-life of the two-neutrino double beta decay of ^100Mo to the ground state of ^100Ru, 𝑇_1/2=[6.81±0.01( stat )^+0.38_−0.40( syst )]×10^18 year. The two-electron ene…
View article: Detailed studies of 100 Mo two-neutrino double beta decay in NEMO-3
Detailed studies of 100 Mo two-neutrino double beta decay in NEMO-3 Open
The full data set of the NEMO-3 experiment has been used to measure the half-life of the two-neutrino double beta decay of 100Mo to the ground state of 100Ru, T1/2=[6.81±0.01(stat)-0.40+0.38(syst)]×1018 year. The two-electron energy s…
View article: Precise measurement of 2ν2β decay of 100Mo with Li2MoO4 low temperature detectors: Preliminary results
Precise measurement of 2ν2β decay of 100Mo with Li2MoO4 low temperature detectors: Preliminary results Open
The half-life of 100Mo relatively to the 2ν2β decay to the ground state of 100Ru was measured as T1/2 = (6.99±0.15) × 1018 yr with the help of enriched in 100Mo lithium molybdate scintillating bolometers in the EDELWEISS-III low background…
View article: Recent Developments and Results on Double Beta Decays with Crystal Scintillators and HPGe Spectrometry
Recent Developments and Results on Double Beta Decays with Crystal Scintillators and HPGe Spectrometry Open
Recent developments, results, and perspectives arising from double beta decay experiments at the Gran Sasso National Laboratory (LNGS) of the INFN by using HPGe detectors and crystal scintillators and by exploiting various approaches and d…
View article: Final results on $^\textbf{82}$Se double beta decay to the ground state of $^\textbf{82}$Kr from the NEMO-3 experiment
Final results on $^\textbf{82}$Se double beta decay to the ground state of $^\textbf{82}$Kr from the NEMO-3 experiment Open
Using data from the NEMO-3 experiment, we have measured the two-neutrino double beta decay ($2\nu\beta\beta$) half-life of $^{82}$Se as $T_{1/2}^{2\nu} = \left[ 9.39 \pm 0.17\,\left(\mbox{stat}\right) \pm 0.58\,\left(\mbox{syst}\right)\rig…
View article: Search for rare processes with DAMA experimental set-ups
Search for rare processes with DAMA experimental set-ups Open
Profiting of the favourable conditions offered by the Gran Sasso underground laboratory and of the several low-background DAMA set-ups, many and competitive results have been obtained for rare processes. Here the main results will be brief…