The "cold" varieties of these particles can be produced using liquid deuterium, and are used for measuring their scattering.
The "cold" varieties of these particles can be produced using liquid deuterium, and are used for measuring their scattering. They can be detected by gas proportional detectors filled with helium-3. They are used in NAA and PGAA to determine the elemental composition of a sample. PT symmetry would be violated by the existence of a dipole moment for these particles that are produced in spallation. One of their down quarks changes to an up quark in beta minus decay. Isotopes have the same number of protons but different numbers of, for 10 points, these particles with no electric charge.
The "cold" varieties of these particles can be produced using liquid deuterium, and are used for measuring their scattering.
neutrons