A5103265531- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Cosmology and Gravitation Theories
- Scientific Research and Discoveries
- Nuclear Physics and Applications
- Radioactive Decay and Measurement Techniques
- Muon and positron interactions and applications
- Manufacturing Process and Optimization
- CCD and CMOS Imaging Sensors
- Quantum Chromodynamics and Particle Interactions
- Quantum, superfluid, helium dynamics
- Radiation Shielding Materials Analysis
- Neural Networks and Applications
- Radioactive contamination and transfer
- Big Data Technologies and Applications
- Particle Accelerators and Free-Electron Lasers
- Computational Physics and Python Applications
- Text Readability and Simplification
- Scientific Computing and Data Management
University of Warwick
2013-2023
Rhodes College
2023
University of Sheffield
2002-2021
Advanced Manufacturing Research Centre
2021
Centre National de la Recherche Scientifique
2017-2020
Aix-Marseille Université
2017-2020
Symetrica Security (United Kingdom)
2013
ETH Zurich
2011
Texas A&M University
2005-2009
Imperial College London
2009
We present the case for a dark matter detector with directional sensitivity. This document was developed at 2009 CYGNUS workshop on detection, and contains contributions from theorists experimental groups in field. describe need sensitivity; each experiment presents their project's status; we close feasibility study scaling up to one ton detector, which would cost around $150M.
Observing double beta decay with no neutrinos in the final state, would signal existence of lepton number violating processes and hint at neutrino being a Majorana particle. The impressive effort represented by NEMO-3 experiment sets important constraints on mass lepton-number processes.
The NEMO-3 experiment at the Modane Underground Laboratory has investigated double-$\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...
The T2K experiment studies oscillations of an off-axis muon neutrino beam between the J-PARC accelerator complex and Super-Kamiokande detector. Special emphasis is placed on measuring mixing angle theta_13 by observing electron appearance via sub-dominant to oscillation, searching for CP violation in lepton sector. includes a sophisticated, off-axis, near detector, ND280, situated 280 m downstream production target order measure properties understand better interactions at energy scale below...
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...
The performance of Hamamatsu 8" photomultiplier tubes (PMTs) the type used in SuperNEMO neutrinoless double-beta decay experiment (R5912-MOD), is investigated as a function exposure to helium (He) gas. Two PMTs were monitored for over year, one exposed varying concentrations He, and other kept standard atmospheric conditions control. Both light signals generated by Bi-207 radioactive source that provided consistent large input PMT similar those are typical experiment. energy resolution...
Four 1-cm${}^{3}$ CdZnTe semiconductor detectors were operated in the Gran Sasso National Laboratory to explore feasibility of such devices for double \ensuremath{\beta}-decay searches as proposed COBRA experiment. The research involved background studies accompanied by measurements energy resolution performed at surface. Energy resolutions sufficient reduce contribution two-neutrino events a negligible level large-scale experiment have already been achieved and further improvements are...
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.