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Subatomic particle with no charge
A neutron is a subatomic particle, symbol n or n0 , that has no electric charge, and a mass slightly greater than that of a proton. The neutron was discovered
Neutron
Collapsed core of a massive star
A neutron star is the gravitationally collapsed core of a massive supergiant star. It results from the supernova explosion of a massive star—combined
Neutron_star
Low-yield thermonuclear weapon
A neutron bomb, officially defined as a type of enhanced radiation weapon (ERW), is a low-yield thermonuclear weapon designed to maximize lethal neutron
Neutron_bomb
American animated television series
The Adventures of Jimmy Neutron, Boy Genius (or just The Adventures of Jimmy Neutron and often shortened as Jimmy Neutron) is an American animated science
The Adventures of Jimmy Neutron, Boy Genius
The_Adventures_of_Jimmy_Neutron,_Boy_Genius
Topics referred to by the same term
In nuclear physics, neutron decay may refer to: Neutron emission by an atomic nucleus Free neutron decay Beta decay of a neutron inside an atomic nucleus
Neutron_decay
Kinetic energy of an unbound neutron
The neutron detection temperature, also called the neutron energy, indicates a free neutron's kinetic energy, usually given in electron volts. The term
Neutron_temperature
2001 animated film by John A. Davis
Jimmy Neutron: Boy Genius is a 2001 American animated science fiction comedy film directed by John A. Davis and written by Davis, David N. Weiss, J. David
Jimmy_Neutron:_Boy_Genius
Topics referred to by the same term
Look up neutron in Wiktionary, the free dictionary. A neutron is a subatomic particle. Neutron may also refer to: Neutron (comics), the name of several
Neutron_(disambiguation)
Type of neutron star with beams of radiation
(pulsating star, on the model of quasar) is a highly magnetized rotating neutron star that emits beams of electromagnetic radiation out of its magnetic
Pulsar
Animated titular character
"Jimmy" Neutron, commonly known as Jimmy Neutron, Boy Genius, is the protagonist and title character from the 2001 animated film Jimmy Neutron: Boy Genius
Jimmy_Neutron
characters in the American film Jimmy Neutron: Boy Genius, its subsequent television series The Adventures of Jimmy Neutron, Boy Genius and other media of the
List of Jimmy Neutron characters
List_of_Jimmy_Neutron_characters
Partially-reusable medium-lift launch vehicle
Neutron is a partially reusable, medium-lift, two-stage launch vehicle under development by Rocket Lab. Announced on March 1, 2021, the vehicle is designed
Rocket_Lab_Neutron
Substance that can absorb large quantities of neutrons in a reactor core
as nuclear reactors, a neutron poison (also called a neutron absorber or a nuclear poison) is a substance with a large neutron absorption cross-section
Neutron_poison
Scientific background leading to the discovery of subatomic particles
The discovery of the neutron and its properties was central to the extraordinary developments in atomic physics in the first half of the 20th century
Discovery_of_the_neutron
Topics referred to by the same term
Look up neutron star in Wiktionary, the free dictionary. A neutron star is the extremely dense collapsed core of a supergiant star. Neutron Star may also
Neutron_Star_(disambiguation)
Ionizing radiation that presents as free neutrons
Neutron radiation is a form of ionizing radiation that presents as free neutrons. Typical phenomena are nuclear fission or nuclear fusion causing the release
Neutron_radiation
The LARMOR neutron microscope is a microscope based on the principle of neutron scattering. It is named in honor of Joseph Larmor and the principle of
LARMOR_neutron_microscope
Adventures of Jimmy Neutron, Boy Genius episodes. The series is based on the 2001 film Jimmy Neutron: Boy Genius. "The Adventures of Jimmy Neutron: Boy Genius:
List of The Adventures of Jimmy Neutron, Boy Genius episodes
List_of_The_Adventures_of_Jimmy_Neutron,_Boy_Genius_episodes
Source of neutrons from linear particle accelerators
Neutron generators are neutron source devices which contain compact linear particle accelerators and that produce neutrons by fusing isotopes of hydrogen
Neutron_generator
Reaction that splits an atomic nucleus
splits into two or more smaller nuclei. The fission process often produces neutrons and gamma rays, and releases a very large amount of energy even by the
Nuclear_fission
Substance that slows down particles with no electric charge
engineering, a neutron moderator is a medium that reduces the speed of fast neutrons, ideally without capturing any, leaving them as thermal neutrons with only
Neutron_moderator
Total distance traveled by neutrons within a volume over a time period
The neutron flux is a scalar quantity used in nuclear physics and nuclear reactor physics. It is the total distance travelled by all free neutrons per
Neutron_flux
When one nuclear reaction causes more
number of neutrons ejected: U 235 + neutron ⟶ fission fragments + 2.4 neutrons + 192.9 MeV Pu 239 + neutron ⟶ fission fragments + 2.9 neutrons + 198
Nuclear_chain_reaction
Technique to investigate atomic structures using neutron scattering
Neutron diffraction or elastic neutron scattering is the application of neutron scattering to the determination of the atomic and/or magnetic structure
Neutron_diffraction
Index of articles associated with the same name
Neutron may refer to several comic book characters: Neutron (DC Comics), a DC Comics character Neutron (Linus), an Italian comics character from Linus
Neutron_(comics)
Comic book series
Neutron is an Italian comic book series and the name of the eponymous main character created in 1965 by Guido Crepax. The series eventually became Valentina
Neutron_(Linus)
Type of stellar collision
A neutron star merger is the stellar collision of neutron stars. When two neutron stars fall into mutual orbit, they gradually spiral inward due to the
Neutron_star_merger
Atomic nuclear process
Neutron capture is a nuclear reaction in which an atomic nucleus and one or more neutrons collide and merge to form a heavier nucleus. Since neutrons
Neutron_capture
Type of neutron star with a strong magnetic field
A magnetar is a type of neutron star with an extremely powerful magnetic field (~109 to 1011 T, ~1013 to 1015 G). The magnetic-field decay (or dissipation)
Magnetar
Analogue semi-modular synthesizer
The Neutron is a dual-oscillator monophonic synthesizer manufactured by Behringer. Released in 2018, the Neutron has an analogue signal path and uses subtractive
Neutron_(synthesizer)
Neutron embrittlement, sometimes more broadly radiation embrittlement, is the embrittlement of various materials due to the action of neutrons. This is
Neutron_embrittlement
Material capable of sustaining a nuclear fission chain reaction
either slow neutrons (i.e., a thermal system) or fast neutrons. Fissile material can be used to fuel thermal-neutron reactors, fast-neutron reactors and
Fissile_material
Number of neutrons in a nuclide
The neutron number (symbol N) is the number of neutrons in a nuclide. Atomic number (proton number) plus neutron number equals mass number: Z + N = A.
Neutron_number
1984 single by the Pointer Sisters
"Neutron Dance" is a song written by Allee Willis and Danny Sembello which was introduced by the Pointer Sisters on their 1983 album Break Out. The song
Neutron_Dance
1945–1946 sphere of plutonium
intended to demonstrate how close the core was to criticality, using a neutron-reflective tamper (layer of dense material surrounding the fissile material)
Demon_core
Topics referred to by the same term
Jimmy Neutron is a fictional character. Jimmy Neutron may also refer to: Jimmy Neutron (franchise) Jimmy Neutron: Boy Genius, the 2001 animated film Jimmy
Jimmy Neutron (disambiguation)
Jimmy_Neutron_(disambiguation)
Neutron detection is the effective detection of neutrons entering a well-positioned detector. There are two key aspects to effective neutron detection:
Neutron_detection
Induction of radioactivity by neutron radiation
Neutron activation is the process in which neutron radiation induces radioactivity in materials, and occurs when atomic nuclei capture free neutrons, becoming
Neutron_activation
Material with the ability to reflect neutrons; used to control fission reactions
A neutron reflector is any material that reflects neutrons. This refers to elastic scattering rather than to a specular reflection. Neutron reflectors
Neutron_reflector
Robust nuclear reactor monitoring device
Self Powered Neutron Detector (SPND) is a neutron detector used in nuclear fission reactors. It is a compact device extensively used worldwide for mapping
Self_Powered_Neutron_Detector
Atoms of the same element, but different mass
but different nucleon numbers (mass numbers) due to different numbers of neutrons in their nuclei. While all isotopes of a given element have virtually the
Isotope
Measure of neutron interaction likelihood
concept of a neutron cross section is used to express the likelihood of interaction between an incident neutron and a target nucleus. The neutron cross section
Neutron_cross_section
Type of dense exotic matter in physics
astrophysics to refer to dense stellar objects such as white dwarfs and neutron stars, where thermal pressure alone is not enough to prevent gravitational
Degenerate_matter
Study of motions and interactions of neutrons
Neutron transport (also known as neutronics) is the study of the motions and interactions of neutrons with materials. The neutron transport equation models
Neutron_transport
Free neutrons stored in very small traps
Ultracold neutrons (UCN) are free neutrons which can be stored in traps made from certain materials. The storage is based on the reflection of UCN by such
Ultracold_neutrons
American media franchise
Jimmy Neutron is an American animated media franchise created by John A. Davis and owned by the Nickelodeon Group division of Paramount Skydance. The
Jimmy_Neutron_(franchise)
American comedian and actor (1975–2025)
Estevez in Jimmy Neutron: Boy Genius as well as its two Nickelodeon spin-off television show series—The Adventures of Jimmy Neutron, Boy Genius and Planet
Jeff_Garcia_(comedian)
Strategy game
Neutron is a two-player abstract strategy game invented by Robert A. Kraus. The game was first published in the Playroom section of Games & Puzzles in
Neutron_(game)
Device that emits neutrons
A neutron source is any device that emits neutrons, irrespective of the mechanism used to produce the neutrons. Neutron sources are used in physics, engineering
Neutron_source
Type of radioactive decay
Neutron emission is a mode of radioactive decay in which one or more neutrons are ejected from a nucleus. It occurs in the most neutron-rich/proton-deficient
Neutron_emission
Type of microscope
Neutron microscopes use neutrons focused by small-angle neutron scattering to create images by passing neutrons through an object to be investigated.
Neutron_microscope
Neutron stars—extremely dense remnants of stars that have undergone supernova events—have appeared in fiction since the 1960s. Their immense gravitational
Neutron_stars_in_fiction
Physical phenomenon
Neutron scattering, the irregular dispersal of free neutrons by matter, can refer to either the naturally occurring physical process itself or to the man-made
Neutron_scattering
Immediate emission of neutrons after nuclear fission
engineering, a prompt neutron is a neutron immediately emitted (neutron emission) by a nuclear fission event, as opposed to a delayed neutron decay which can
Prompt_neutron
Method used for determining the concentrations of elements in many materials
Neutron activation analysis (NAA) is a nuclear process used for determining the concentrations of elements in many materials. NAA allows discrete sampling
Neutron_activation_analysis
Nonsurgical treatment for locally invasive malignant tumors
Neutron capture therapy (NCT) is a type of radiotherapy for treating locally invasive malignant tumors such as primary brain tumors, recurrent cancers
Neutron capture therapy of cancer
Neutron_capture_therapy_of_cancer
Atomic nuclei decay delimiter
unbound with respect to the emission of a proton or neutron. An arbitrary combination of protons and neutrons does not necessarily yield a stable nucleus. One
Nuclear_drip_line
Nuclear reactor that uses moderated neutrons
A thermal-neutron reactor is a nuclear reactor that uses slow or thermal neutrons. ("Thermal" does not mean hot in an absolute sense, but means in thermal
Thermal-neutron_reactor
Measure of the efficiency of a nuclear fission reaction
Neutron economy is defined as the ratio of excess neutron production divided by the rate of fission. The numbers are a weighted average based primarily
Neutron_economy
Neutron spectroscopy is a spectroscopic method of measuring atomic and magnetic motions by measuring the kinetic energy of emitted neutrons. The measured
Neutron_spectroscopy
American football fan (1942–2004)
The Neutron Man (March 30, 1942 – October 7, 2004), real name Orlas King, was a popular Ohio State Buckeyes fan for over thirty years. Always seated by
Neutron_Man
Neutron and Star, also known as Seventh Heaven, is a British trance duo consisting of producer/writer Alan Stott and vocalist/writer Lucy Clarke. "Neutron
Neutron_and_Star
Prediction in nuclear physics
attributed to stabilizing effects of predicted "magic numbers" of protons and neutrons in the superheavy mass region. Several predictions have been made regarding
Island_of_stability
Highly-polished material in particle physics
A neutron supermirror is a highly polished, layered material used to reflect neutron beams. Supermirrors are a special case of multi-layer neutron reflectors
Neutron_supermirror
British physicist (1891–1974)
who received the Nobel Prize in Physics in 1935 for his discovery of the neutron. In 1941, he wrote the final draft of the MAUD Report, which inspired the
James_Chadwick
Process of making an image with neutrons
Neutron imaging is the process of making an image with neutrons. The resulting image is based on the neutron attenuation properties of the imaged object
Neutron_imaging
Decay of a neutron when outside a nucleus
A free neutron refers to a neutron that is not bound to an atomic nucleus. When embedded in a stable nuclide, neutrons have not been observed to decay
Free_neutron_decay
Several neutron scattering techniques have been developed to use thermal neutrons to characterize magnetic micro and nanostructures. Small-angle neutron scattering
Neutron_magnetic_imaging
Smallest amount of fissile material needed to sustain a nuclear reaction
neutron population. A numerical measure of a critical mass depends on the effective neutron multiplication factor k, the average number of neutrons released
Critical_mass
Nuclear reactor where fast neutrons maintain a fission chain reaction
sustained by fast neutrons (carrying energies above 1 MeV, on average), as opposed to slow thermal neutrons used in thermal-neutron reactors. Such a fast
Fast-neutron_reactor
Core of an atom composed of nucleons
The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford at the
Atomic_nucleus
Italian-American physicist (1901–1954)
radioactive elements produced by neutron irradiation, and for his related discovery of nuclear reactions brought about by slow neutrons". He has been called the
Enrico_Fermi
Interferometer using neutron diffraction to make precise measurements
In physics, a neutron interferometer is an interferometer capable of diffracting neutrons, allowing the wave-like nature of neutrons, and other related
Neutron_interferometer
Type of radioactive decay
transforming into an isobar of that nuclide. For example, beta decay of a neutron transforms it into a proton by the emission of an electron accompanied
Beta_decay
Astrophysical phenomenon
fusion. The original object, called the progenitor, either collapses to a neutron star or black hole, or is completely destroyed to form a diffuse nebula
Supernova
American actress
known voicing Judy Neutron in the animated film Jimmy Neutron: Boy Genius (2001), and its television series The Adventures of Jimmy Neutron, Boy Genius. Cavanagh
Megan_Cavanagh_(actress)
Neutron tomography is a form of computed tomography involving the production of three-dimensional images by the detection of the absorbance of neutrons
Neutron_tomography
three axis spectroscopy) is a technique used in conjunction with inelastic neutron scattering. The instrument is referred to as triple-axis spectrometer (also
Neutron triple-axis spectrometry
Neutron_triple-axis_spectrometry
A neutron monitor is a ground-based detector designed to measure the number of high-energy charged particles striking the Earth's atmosphere from outer
Neutron_monitor
Delayed emission of neutrons after nuclear fission
In nuclear engineering, a delayed neutron is a neutron released not immediately during a nuclear fission event, but shortly afterward—ranging from milliseconds
Delayed_neutron
Form of fusion power
carried by neutrons. While the lowest-threshold nuclear fusion reactions release up to 80% of their energy as the kinetic energy of neutrons, aneutronic
Aneutronic_fusion
Medical intervention
Fast neutron therapy utilizes high energy neutrons typically between 50 and 70 MeV to treat cancer. Most fast neutron therapy beams are produced by reactors
Fast_neutron_therapy
fission weapons that use nuclear fusion reactions to generate high-energy neutrons that accelerate the fission chain reaction and increase its efficiency
Nuclear_weapon_design
Core atomic nucleus surrounded by orbiting protons or neutrons
when it has a core nucleus surrounded by a "halo" of orbiting protons or neutrons, which makes the radius of the nucleus appreciably larger than that predicted
Halo_nucleus
Comics character
Neutron (Nathaniel Tryon) is a fictional character appearing in American comic books published by DC Comics, primarily as an enemy of Superman. Neutron
Neutron_(DC_Comics)
Chemical element with atomic number 4 (Be)
relation to neutron energy, allowing for significant slowing of higher-energy neutrons. Therefore, it works as a neutron reflector and neutron moderator;
Beryllium
Device used to regulate the power of a nuclear reactor
of absorbing many neutrons without themselves decaying. These elements have different neutron capture cross sections for neutrons of various energies
Control_rod
Neutron reflectometry is a neutron diffraction technique for measuring the structure of thin films, similar to the often complementary techniques of X-ray
Neutron_reflectometry
Smallest unit of a chemical element
blocks of matter. An atom consists of a nucleus of protons and generally neutrons, surrounded by an electromagnetically bound swarm of electrons. The chemical
Atom
Measurement standards laboratory in the United States
nanoscale science and technology, engineering, information technology, neutron research, material measurement, and physical measurement. From 1901 to
National Institute of Standards and Technology
National_Institute_of_Standards_and_Technology
Neutron scattering technique
Neutron spin echo spectroscopy is an inelastic neutron scattering technique invented by Ferenc Mezei in the 1970s and developed in collaboration with John
Neutron_spin_echo
Electricity generation by nuclear fusion
known as DT fusion. This reaction forms a helium nucleus and an energetic neutron. Fusion fuel is extremely energy-dense, but tritium is scarce on Earth
Fusion_power
American voice actress (born 1960)
games. From 2001 to 2006, she voiced the titular protagonist of the Jimmy Neutron franchise. Derryberry was born Debi Greenberg on September 27, 1960, in
Debi_Derryberry
Field of physics that studies atomic interactions
— only protons and neutrons — and that neutrons were spin 1⁄2 particles, which explained the mass not due to protons. The neutron spin immediately solved
Nuclear_physics
Federal research center in Tennessee, US
third most powerful. The lab is a neutron and nuclear power research facility that includes the Spallation Neutron Source, the High Flux Isotope Reactor
Oak_Ridge_National_Laboratory
American business executive (1935–2020)
hierarchy. During the early 1980s, Welch was dubbed "Neutron Jack" (in reference to the neutron bomb) for eliminating employees while leaving buildings
Jack_Welch
Nucleosynthesis pathway
In nuclear astrophysics, the rapid neutron-capture process, also known as the r-process, is a set of nuclear reactions that is responsible for the creation
R-process
Nuclear physics classification method
depend on evenness or oddness of its atomic number (proton number) Z, neutron number N and, consequently, of their sum, the mass number A. Most importantly
Even_and_odd_atomic_nuclei
Field of physics dealing with nuclear reactors
reactor, the neutron population at any instant is a function of the rate of neutron production (due to fission processes) and the rate of neutron losses (due
Nuclear_reactor_physics
Device for controlled nuclear reactions
single neutrons and split, releasing energy and multiple neutrons, which can induce further fission. Reactors stabilize this, regulating neutron absorbers
Nuclear_reactor
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