A subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen
(Of an atomic nucleus) containing significantly more neutrons than protons; (of an element or isotope) having nuclei of this type.
A neutron with high kinetic energy, especially one released by nuclear fission and not slowed by any moderator
A nuclear weapon that produces large numbers of neutrons rather than heat or blast, and is consequently harmful to life but not destructive of property
A celestial object of very small radius (typically 30 km) and very high density, composed predominantly of closely packed neutrons. Neutron stars are thought to form by the gravitational collapse of the remnant of a massive star after a supernova explosion, provided that the star is insufficiently massive to produce a black hole
A neutron with low kinetic energy especially after moderation
The absorption of a neutron by an atomic nucleus.
A device for converting a continuous beam of neutrons into a pulsed beam by passing it through a rotating slotted disc or cylinder.
An instrument for detecting and counting neutrons.
The excess of the number of neutrons in an atomic nucleus over the number of protons.
The mass number of a nucleus minus its atomic number, taken as being the number of neutrons it contains.
The branch of physics concerned with phenomena in which the wavelike properties of neutrons are dominant and behaviour analogous to that of light waves is observed, especially diffraction.
Radiotherapy employing a beam of (slow or fast) neutrons; specifically = neutron capture therapy.
A nuclear warhead that contains or consists of a neutron bomb.
A neutron in thermal equilibrium with its surroundings
The process of making a substance radioactive by irradiating it with neutrons; frequently attributive.
The scattering of neutrons; specifically the scattering of an incident beam of neutrons by a substance, used to investigate condensed-matter phenomena.
Diffraction of a beam of neutrons.
Radiography in which the radiation employed is a beam of neutrons.
An instrument for measuring the energy spectrum of neutron radiation.
A form of radiotherapy using a compound (usually one containing boron-10) that accumulates in tumour or other abnormal tissue and becomes a radiation source (by neutron capture) when subjected to an external neutron beam.
A method of chemical analysis in which a sample is irradiated with neutrons and its radioactive components are then identified and measured using various spectrometric and radiochemical techniques.