Protons are tiny particles just a femtometer across, but without them, atoms wouldn't exist. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

USING the neutrons released in the beryllium-deuterium nuclear reaction, we have investigated the scattering of medium fast neutrons in deuterium gas. The bombarding deuteron beam of 4 micro-amperes ...

RECENT evidence 1, 2 of neutral particles of atomic mass and great penetrating power suggests the possibility that terrestial matter may contain similar particles of low (thermal) energies, undetected ...