Articles tagged with Beta Decay
The KATRIN collaboration presents the most precise direct search for sterile neutrinos through measurements of tritium β-decay. No sign of a sterile neutrino was found, excluding a large region of parameter space suggested by earlier anomalies. The result relies on distinct detection methods and complements oscillation experiments.
Researchers at the Chinese Academy of Sciences have discovered aluminium-20, an unstable isotope that decays via three-proton emission. The study provides insights into the structure and decay of nuclei beyond the proton drip line, shedding light on isospin symmetry breaking.
Researchers at GSI Helmholtzzentrum für Schwerionenforschung GmbH measure half-life of thallium-205 ion decay to understand Sun's long-term stability and its connection to Earth's climate. The experiment, known as LOREX, provides insights into the Sun's evolutionary history.
Researchers successfully measured the bound-state beta decay of fully-ionized thallium ions, revealing key information about AGB star production and the Sun's formation time. The discovery allows for accurate calculations of radioactive lead production in these stars, providing insights into the solar system's early history.
Researchers study lithium-8 and boron-8 mirror nuclei to understand the weak nuclear force, achieving highest precision of their kind. The results confirm Standard Model predictions with increased confidence.
Researchers at PNNL have developed ultra-low radiation cables to minimize interference from cosmic radiation, increasing sensitivity and flexibility in detector design. These cables can help solve key mysteries of the universe, including dark matter and neutrino properties.
Researchers from the US and Germany report a realistic contender to measure the elusive neutrino mass using Cyclotron Radiation Emission Spectroscopy. The project tracks electrons generated by beta decay to reveal the neutrino mass, aiming for scalability beyond existing technology.
Researchers observed a strongly isospin-mixed doublet in silicon-26, with the largest ever recorded mixing matrix element. This unexpected result challenges current understanding of nuclear force and cannot be explained by standard nuclear models.
Researchers used a COLTRIMS reaction microscope to determine the duration of an electron's release after photon absorption. The study found that the emission time depends on the direction and velocity of the electron, revealing a complex interplay between quantum physics and molecular dynamics.
Physicists at Technical University of Munich discover potential existence of tetra-neutron, a bound state of four neutrons, which could significantly alter our understanding of nuclear forces. The experiment's results suggest a half-life of 450 seconds and stability comparable to the neutron.
Researchers found that quantum mechanics' influence on particles affects light emission, demonstrating wavefunction collapse and altering interference patterns. The study sheds new light on the counter-intuitive phenomenon, revealing a direct connection between light emission and quantum entanglement.
Researchers at the University of Freiburg have detected a previously unknown quantum effect in metal clusters, where electrons exhibit behavior similar to classical particles. The team's findings contradict previous predictions and suggest that decoherence suppresses interferences, leading to almost classical distributions.
A team of scientists from Argonne National Laboratory developed a method to dramatically improve ultrafast time resolution achievable with X-ray free-electron lasers. This breakthrough enables new insights into the behavior of materials and chemical processes, allowing for more efficient designs and discoveries.
A team of researchers has developed a method to synchronize X-ray and laser pulses, enabling precise measurements of Auger decay in neon gas. This breakthrough could help evade radiation damage in experiments studying exotic states of matter.
Researchers at TU Wien discovered a new type of electron emission in carbon materials like graphite, where electrons are emitted with a precise energy of 3.7 eV. The symmetry-breaking electrons cause the material to emit electrons with the properties of two different states simultaneously.
Researchers from GSI Helmholtzzentrum für Schwerionenforschung GmbH produce the hitherto unknown nucleus mendelevium-244, an odd-odd nucleus consisting of 101 protons and 143 neutrons. The study reveals puzzling short-lived fission activity in this nucleus.
A new experiment has characterised the properties of electrons emitted when adenine, a key DNA nucleobase, is bombarded with high-velocity ions. The study's findings could improve understanding of how radiation damage increases cancer risk in cells.
The University of Jyvaskyla's nuclear theory group, in collaboration with the EXO-200 experiment, has made significant progress in solving the long-standing reactor antineutrino anomaly. By measuring the electron spectral shape of beta decay, they have verified a theoretical hypothesis and supported the HKSS flux model.
Researchers in the Keller group at ETH Zurich have measured for the first time how single photons alter an unbound electron's dynamics. They found a delay of up to 12 attoseconds between s- and d-electrons, depending on their angular momentum. This subtle signature reflects underlying quantum-mechanical effects.
Researchers from SUTD discovered a new theory that describes thermionic emission in graphene, improving the accuracy of models used to design devices. The new approach overcomes limitations of existing Dirac cone approximation, enabling universal descriptions of graphene-based devices across different temperatures and energy regimes.
Researchers from MSU and TRIUMF observed a rare nuclear decay in beryllium-11, measuring low-kinetic-energy protons emitted after beta decay. The observation represents a new challenge for understanding exotic nuclei, particularly halo nuclei.
The EXO-200 collaboration has established some of the strongest limits yet for neutrinoless double beta decay and two-neutrino double beta decay of xenon-136. This research sets the stage for future experiments that will search for the hypothetical process, which would confirm that neutrinos are their own antiparticles.
The GERDA experiment has set a record-breaking sensitivity for detecting the neutrinoless double beta decay, which could reveal if neutrinos are their own antiparticles. The LEGEND project plans to increase the detector mass and reduce background noise to achieve even greater sensitivity.
Scientists at Lobachevsky University and their Japanese colleagues tested the hypothesis of multi-photon photoemission by studying the behavior of gold nanorods under ultrafast laser excitation. The results contradict previous theories, instead supporting the tunnel emission mechanism as the primary process.
Physicists have solved a 50-year-old mystery in beta decay, a process that drives stellar explosions and synthesizes elements. Using advanced computing power, researchers found that the beta decay rate for an atomic nucleus is more complicated than initially thought.
Scientists at ORNL solved a 50-year-old puzzle explaining why beta decays are slower than expected by including subtle effects in theoretical models. The team used ORNL's Titan supercomputer to simulate tin-100 decay into indium-100, demonstrating increased confidence in computing nuclear processes.
Researchers used deep convolutional neural networks to discriminate between signal and background tracks in the PandaX-III experiment, improving detection efficiency by 62% compared to traditional methods. The technique enhances our understanding of neutrinos and their role in matter-antimatter asymmetry.
Researchers from MIPT and TISNCM developed a new type of nuclear battery using nickel-63 that packs about 3,300 milliwatt-hours of energy per gram, exceeding previous records. The battery achieves a power density 10 times higher than commercial chemical cells, making it suitable for powering small devices.
Researchers at DOE/Princeton Plasma Physics Laboratory have found a way to reduce secondary electron emission by up to 80% using fractal fibers resembling feathers and whiskers. This breakthrough improves the performance of plasma devices such as spacecraft thrusters and particle accelerators.
Researchers at FAU successfully control electron pulses using laser delays, exhibiting quantum path interference and opening doors for time-resolved electron microscopy. The discovery could lead to complex electron pulses in the future, revolutionizing surface coherence research.
Scientists at TU Wien develop new approach to controlling electron emission using two laser pulses fired at a metal tip. They demonstrate the ability to switch electron emission on and off on extremely short time scales. This breakthrough opens up possibilities for controlled x-ray generation.
A team of researchers from INRS developed novel graphenated-MWCNTs with enhanced field electron emission properties by decorating graphene sheets with gold nanoparticles. This innovation enhances the density of electron-emitting sites, improving FEE performance and opening new prospects for portable X-ray imaging systems.
Researchers at Max Planck Institute in Germany develop new way to measure electron pair emission directly on a standard lab bench using time-of-flight spectrometers. This breakthrough allows for the quantification of electron correlation strength, crucial for designing novel materials with desirable properties.
Physicists Andrea Pocar and Krishna Kumar's team successfully set a new lower limit for the half-life of neutrino-less double-beta decay, nearly excluding a 10-year-old claim. The discovery could provide insight into matter and anti-matter asymmetry in the universe.
Researchers narrow down possible masses for neutrino, a tiny particle that rarely interacts with matter, using sensitive detectors buried underground. The new data suggests a neutrino cannot be more massive than about 0.140 to 0.380 electron volts.
Researchers have developed a promising replacement for plastics using amorphous bulk metallic glass (ABM) alloys. These alloys offer excellent electron emission properties and robust thermal stability, making them suitable for various applications such as field emission devices, electron microscopes, and modern display devices.
Physicist Hans-Otto Meyer's experiment reveals unexpected behavior of cryogenic electron emission at extremely low temperatures. Electron emissions increase in bursts as the temperature decreases, challenging current understanding of physics.