160 research outputs found
Adaptation in Affective Video Games during the Covid-19 Pandemic
Though national players area unit on the average 35-44 years recent, most diagnoses of on-line recreation Disorder occur in adolescents.This data point may be a symptom of the usually neglected role of Adults within the diagnostic method, the questionable initial line in perceiving a tangle of web use and games in their kids.Parents' negative attitudes towards games and family quarrels are shown to be predictors of gambling addiction among adolescents.</p
Copper electroforming service at Laboratorio Subterráneo de Canfranc
Electroforming of copper can be very effective to obtain high radio-purity copper parts for low-background experiments. To support the construction of experiments at the Laboratorio Subterráneo de Canfranc in Spain, a Copper Electroforming Service (CES) set-up is in operation. In this work the electroforming system is described and results on the radio-purity of parts made are presented
A New Limit on the Neutrinoless DBD of 130Te
We report the present results of CUORICINO a cryogenic experiment on
neutrinoless double beta decay (DBD) of 130Te consisting of an array of 62
crystals of TeO2 with a total active mass of 40.7 kg. The array is framed
inside of a dilution refrigerator, heavily shielded against environmental
radioactivity and high-energy neutrons, and operated at a temperature of ~8 mK
in the Gran Sasso Underground Laboratory. Temperature pulses induced by
particle interacting in the crystals are recorded and measured by means of
Neutron Transmutation Doped thermistors. The gain of each bolometer is
stabilized with voltage pulses developed by a high stability pulse generator
across heater resistors put in thermal contact with the absorber.
The calibration is performed by means of two thoriated wires routinely
inserted in the set-up. No evidence for a peak indicating neutrinoless DBD of
130Te is detected and a 90% C.L. lower limit of 1.8E24 years is set for the
lifetime of this process. Taking largely into account the uncertainties in the
theoretical values of nuclear matrix elements, this implies an upper boud on
the effective mass of the electron neutrino ranging from 0.2 to 1.1 eV. This
sensitivity is similar to those of the 76Ge experiments.Comment: 4 pages, 2 figure
New Results for Double-Beta Decay of Mo-100 to Excited Final States of Ru-100 Using the TUNL-ITEP Apparatus
The coincidence detection efficiency of the TUNL--ITEP apparatus designed for
measuring half-life times of two-neutrino double-beta decay transitions to
excited final states in daughter nuclei has been measured with a factor of 2.4
improved accuracy. In addition, the previous measuring time of 455 days for the
study of the Mo-100 two-neutrino double-beta decay to the first excited 0+
state in Ru-100 has been increased by 450 days, and a new result (combined with
the previous measurement obtained with the same apparatus) for this transition
is presented: T_(1/2) = [5.5 (+1.2/-0.8) (stat) +/- 0.3 (syst)] x 10^20 y.
Measured two-neutrino double-beta decay half-life times to excited states can
be used to test the reliability of nuclear matrix element calculations needed
for determining the effective neutrino mass from zero-neutrino double-beta
decay data. We also present new limits for transitions to higher excited states
in Ru-100 which, if improved, may be of interest for more exotic conjectures,
like a bosonic component to neutrino statistics
Double-beta decay of Te to the first 0 excited state of Xe with CUORICINO
The CUORICINO experiment was an array of 62 TeO single-crystal
bolometers with a total Te mass of kg. The experiment finished
in 2008 after more than 3 years of active operating time. Searches for both
and double-beta decay to the first excited state in
Xe were performed by studying different coincidence scenarios. The
analysis was based on data representing a total exposure of
N(Te)t=y. No evidence for a signal was
found. The resulting lower limits on the half lives are y (90% C.L.), and
y (90%
C.L.).Comment: 6 pages, 4 figure
Long term measurement of the 222Rn concentration in the Canfranc Underground Laboratory
We report the results of 6 years (2013–2018) of
measurements of 222Rn air concentration, relative humidity, atmospheric pressure and temperature in the halls A,
B and C of the Canfranc Underground Laboratory (LSC).
We have calculated all the Pearson correlation coefficients
among these parameters and we have found a positive correlation between the 222Rn concentration and the relative
humidity. Both correlated variables show a seasonal periodicity. The joint analysis of laboratory data and 4 years (2015–
2018) of the meteorological variables outside the laboratory
shows the correlation between the 222Rn concentration and
the outside temperature. The collected information stresses
the relevance of designing good Rn-mitigation strategies in
current and future experiments at LSC; in particular, we have
checked for two years (2017–2018) the good performance
of the mitigation procedure of the ANAIS-112 experiment.
Finally, we have monitored (2019–2021) for 2 years of live
time, the radon-free air provided by the radon abatement system installed in the laboratory.This research was funded by MCIN/AEI/10.13039/501100011033 under Grant PID2019-104374GB-I00; by MINECO-FEDER under Grants FPA2017-83133-P, and FPA2014-55986-P; by MICINN-FEDER under Grants FPA2011-23749; by CONSOLIDER-Ingenio 2010 Programme under Grants MultiDark CSD2009-00064 and CPAN CSD2007-00042; by the University of Zaragoza under Grant UZ2017-CIE-09; by the Spanish Meteorological Agency (AEMET), the Gobierno de Aragón (Group in Nuclear and Astroparticle Physics, ARAID Foundation and I. Coarasa predoctoral grant), the European Social Fund and by the LSC consortium
Radon and material radiopurity assessment for the NEXT double beta decay experiment
The Neutrino Experiment with a Xenon TPC (NEXT), intended to investigate the
neutrinoless double beta decay using a high-pressure xenon gas TPC filled with
Xe enriched in 136Xe at the Canfranc Underground Laboratory in Spain, requires
ultra-low background conditions demanding an exhaustive control of material
radiopurity and environmental radon levels. An extensive material screening
process is underway for several years based mainly on gamma-ray spectroscopy
using ultra-low background germanium detectors in Canfranc but also on mass
spectrometry techniques like GDMS and ICPMS. Components from shielding,
pressure vessel, electroluminescence and high voltage elements and energy and
tracking readout planes have been analyzed, helping in the final design of the
experiment and in the construction of the background model. The latest
measurements carried out will be presented and the implication on NEXT of their
results will be discussed. The commissioning of the NEW detector, as a first
step towards NEXT, has started in Canfranc; in-situ measurements of airborne
radon levels were taken there to optimize the system for radon mitigation and
will be shown too.Comment: Proceedings of the Low Radioactivity Techniques 2015 workshop
(LRT2015), Seattle, March 201
Double Beta Decay: Historical Review of 75 Years of Research
Main achievements during 75 years of research on double beta decay have been
reviewed. The existing experimental data have been presented and the
capabilities of the next-generation detectors have been demonstrated.Comment: 25 pages, typos adde
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