A5028835351- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Nuclear physics research studies
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Muon and positron interactions and applications
- Noncommutative and Quantum Gravity Theories
- Particle accelerators and beam dynamics
- Atomic and Subatomic Physics Research
- Quantum, superfluid, helium dynamics
- Scientific Research and Discoveries
- Radioactive Decay and Measurement Techniques
- Advanced Chemical Physics Studies
- Chemical and Physical Properties of Materials
- Particle Accelerators and Free-Electron Lasers
- Nuclear Physics and Applications
- Quantum Chromodynamics and Particle Interactions
- Quantum Mechanics and Applications
- Radiation Therapy and Dosimetry
Laboratoire d’Annecy de Physique des Particules
2013-2023
Centre National de la Recherche Scientifique
2013-2023
IMT Atlantique
2022
Institut National de Physique Nucléaire et de Physique des Particules
2014-2022
Laboratoire de Physique Subatomique et des Technologies Associées
2012-2022
Nantes Université
2012-2022
Laboratoire AstroParticule et Cosmologie
2013-2022
Université Savoie Mont Blanc
2014-2021
Université Grenoble Alpes
2019
École Nationale Supérieure des Mines de Paris
2012-2014
Observing double beta decay with no neutrinos in the final state, would signal existence of lepton number violating processes and hint at neutrino being a Majorana particle. The impressive effort represented by NEMO-3 experiment sets important constraints on mass lepton-number processes.
In this paper, we study the impact of inclusion recently measured beta decay properties $^{102;104;105;106;107}$Tc, $^{105}$Mo, and $^{101}$Nb nuclei in an updated calculation antineutrino energy spectra four fissible isotopes $^{235, 238}$U, $^{239,241}$Pu. These actinides are main contributors to fission processes Pressurized Water Reactors. The feeding probabilities above-mentioned Tc, Mo Nb have been found play a major role $\gamma$ component heat $^{239}$Pu, solving large part...
The NEMO-3 experiment at the Modane Underground Laboratory has investigated double-$\beta$ decay of $^{48}{\rm Ca}$. Using $5.25$ yr data recorded with a $6.99\,{\rm g}$ sample Ca}$, approximately $150$ candidate events have been selected signal-to-background ratio greater than $3$. half-life for two-neutrino Ca}$ measured to be $T^{2\nu}_{1/2}\,=\,[6.4\, ^{+0.7}_{-0.6}{\rm (stat.)} \, ^{+1.2}_{-0.9}{\rm (syst.)}] \times 10^{19}\,{\rm yr}$. A search neutrinoless yields null result and...
The NEMO-3 collaboration reports the half-life of ${}^{150}$Nd via two-neutrino double-beta decay mode to an unprecedented accuracy. For zero-neutrino ${}^{150}$Nd, distinctive signature possible Majorana nature neutrinos, no observations but sets new upper bounds for in various scenarios beyond standard model.
The full data set of the NEMO-3 experiment has been used to measure half-life two-neutrino double beta decay $$^{100}$$ Mo ground state Ru, $$T_{1/2} = \left[ 6.81 \pm 0.01\,\left( \text{ stat }\right) ^{+0.38}_{-0.40}\,\left( syst \right] \times 10^{18}$$ year. two-electron energy sum, single electron spectra and distribution angle between electrons are presented with an unprecedented statistics $$5\times 10^5$$ events a signal-to-background ratio $$\sim $$ 80. Clear evidence for Single...
We report the results of a search for neutrinoless double-$\ensuremath{\beta}$ decay ($0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$) $^{100}\mathrm{Mo}$, using NEMO-3 detector to reconstruct full topology final state events. With an exposure $34.7\text{ }\text{ }\mathrm{kg}\ifmmode\cdot\else\textperiodcentered\fi{}\mathrm{y}$, no evidence $0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ signal has been found, yielding limit light Majorana neutrino mass mechanism...
Using data from the NEMO-3 experiment, we have measured two-neutrino double beta decay ( $$2\nu \beta $$ ) half-life of $$^{82}$$ Se as $$T_{\smash {1/2}}^{2\nu } \!=\! \left[ 9.39 \pm 0.17\left( \text{ stat }\right) 0.58\left( syst \right] \times 10^{19}$$ y under single-state dominance hypothesis for this nuclear transition. The corresponding matrix element is $$\left| M^{2\nu }\right| = 0.0498 0.0016$$ . In addition, a search neutrinoless $$0\nu using 0.93 kg observed total 5.25 has been...
The NEMO-3 experiment measured the half-life of $2\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ decay and searched for $0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ $^{116}\mathrm{Cd}$. Using 410 g $^{116}\mathrm{Cd}$ installed in detector with an exposure 5.26 y, ($4968\ifmmode\pm\else\textpm\fi{}74$) events corresponding to ground state $^{116}\mathrm{Sn}$ have been observed a signal background ratio about 12. has be...
SuperNEMO is a double-$\beta$ decay experiment, which will employ the successful tracker-calorimeter technique used in recently completed NEMO-3 experiment. implement 100 kg of isotope, reaching sensitivity to neutrinoless ($0\nu\beta\beta$) half-life order $10^{26}$ yr, corresponding Majorana neutrino mass 50-100 meV. One main goals and challenges detector development programme has been reach calorimeter energy resolution, $\Delta$E/E, around 3%/$sqrt(E)$(MeV) $\sigma$, or 7%/$sqrt(E)$(MeV)...
The BiPo-3 detector, running at the Canfranc Underground Laboratory (Laboratorio Subterr'aneo de Canfranc, LSC, Spain) since 2013, is a low-radioactivity detector dedicated to measuring ultra low natural radionuclide contaminations of 208Tl (232Th chain) and 214Bi (238U in thin materials. total sensitive surface area 3.6 m2. has been developed measure radiopurity selenium double β-decay source foils SuperNEMO experiment. In this paper design performance results background measurements...
We report the results of a first experimental search for lepton number violation by four units in neutrinoless quadruple-$\beta$ decay $^{150}$Nd using total exposure $0.19$ kg$\cdot$y recorded with NEMO-3 detector at Modane Underground Laboratory (LSM). find no evidence this and set lower limits on half-life range $T_{1/2}>(1.1-3.2)\times10^{21}$ y $90\%$ CL, depending model used kinematic distributions emitted electrons.
We present the waveform digitiser used in Double Chooz experiment. describe hardware and custom-built firmware specifically developed for The performance of device is tested with regards to digitising low light level signals from photomultiplier tubes measuring pulse charge. This highlights role quantisation effects leads some general recommendations on design use digitisers.
Abstract The NEMO-3 results for the double- $$\beta $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>β</mml:mi> </mml:math> decay of $$^{150}$$ <mml:msup> <mml:mrow/> <mml:mn>150</mml:mn> </mml:msup> Nd to 0 $$^+_1$$ <mml:msubsup> <mml:mn>1</mml:mn> <mml:mo>+</mml:mo> </mml:msubsup> and 2 excited states Sm are reported. data recorded during 5.25 year with 36.6 g isotope used in analysis. signal $$2\nu \beta <mml:mrow> <mml:mn>2</mml:mn> <mml:mi>ν</mml:mi> </mml:mrow>...
The SuperNEMO experiment will search for neutrinoless double-beta decay (0νββ), and study the Standard-Model process (2νββ). technology can measure energy of each electrons produced in a (ββ) decay, reconstruct topology their individual tracks. spectrum requires very accurate calibration to be carried out periodically. Demonstrator Module calibrated using 42 sources, consisting droplet 207Bi within frame assembly. quality these which depends upon entire ^207Bi being contained frame, is key...
The NEMO-3 detector, which had been operating in the Modane Underground Laboratory from 2003 to 2010, was designed search for neutrinoless double $β$ ($0νββ$) decay. We report final results of a $0νββ$ decays with $6.914$ kg $^{100}$Mo using entire data set detector live time $4.96$ yr, corresponds an exposure 34.3 kg$\cdot$yr. perform detailed study expected background signal region and find no evidence data. level observed $[2.8-3.2]$ MeV is $0.44 \pm 0.13$ counts/yr/kg, events are...
Abstract A radiochemical method for producing 82 Se sources with an ultra-low level of contamination natural radionuclides ( 40 K, decay products 232 Th and 238 U) has been developed based on cation-exchange chromatographic purification reverse removal impurities. It includes separation (purification), reduction, conditioning (which decantation, centrifugation, washing, grinding, drying), foil production. The stage, during which highly dispersed elemental selenium is obtained by the...
The detailed understanding of the antineutrino emission from research reactors is mandatory for any high sensitivity experiments either fundamental or applied neutrino physics, as well a good control gamma and neutron backgrounds induced by reactor operation. In this article, associated to thermal reactor: OSIRIS located in Saclay, France, computed first part. calculation performed with summation method, which sums all contributions beta decay branches fission products, coupled time complete...