Quantum mechanics has a reputation that precedes it. Virtually everyone who has bumped up against the quantum realm, whether ...

Bind an electron to a reference ion—the team used the “hydrogen-like” carbon nucleus, stripped down to a single electron. The nucleus of that ion has a known, precise mass.

Silver-110’s decay reveals a promising path to measure antineutrino mass. New data could reshape future neutrino studies.

The electron's mass is one of a few key parameters that govern the structure and properties of atoms, yet because the electron is so tiny, precisely measuring its atomic mass has been difficult.

The results consistently yield the mass of an electron as approximately 9.1 x 10^-31 kg, regardless of variations in voltage and magnetic field strength. Additionally, ...

With the current data from the KATRIN experiment, an upper limit of 0.45 electron volt/c 2 (corresponding to 8 x 10-37 kilograms) could be derived for the neutrino mass.

The KATRIN experiment in Germany nearly halved the maximum possible mass for neutrinos, setting it at 0.45 electron volts.

For context, that’s less than one-millionth the mass of an electron, which clocks in at a comparatively gargantuan 511,000 eV. So, yeah—neutrinos are ridiculously lightweight.

The KATRIN experiment began operations in 2019. It seeks to constrain the neutrino’s mass by looking at the energy spectrum of electrons and electron antineutrinos emitted by decaying tritium, a ...

The mass of an electron is very small compared to a proton or a neutron. 1 840 electrons have the same mass as 1 proton or neutron. Since the nucleus only contains protons and neutrons, ...

For example, a helium atom has an atomic mass of 4, but an atomic number (or positive charge) of 2. ... He called it a neutron, and imagined it as a paired proton and electron.