Neutron FAQs:


Q: Is a neutron a subatomic particle?

A: Yes, and symbol n or n0, with no net electric charge and a mass slightly larger than that of a proton.

Q: Are neutrons absorbed before slowing down to this range?

A: Yes, or in a well-moderated thermal reactor, where epithermal neutrons interact mostly with moderator nuclei, not with either fissile or fertile actinide nuclides.

Q: Is a neutron another hypothetical particle?

A: Yes.

Q: Were neutrons quickly developed by Werner Heisenberg and others?

A: Yes.

Q: Is a neutron liberated from the nucleus?

A: Yes.

Q: Is a neutron an indication of its quark substructure and internal charge distribution?

A: Yes.

Q: Are neutrons so strongly absorbed by normal water that fuel enrichment with fissionable isotope is required?

A: Yes.

Q: Is a neutron not affected by electric fields?

A: Yes, but it is affected by magnetic fields.

Q: Are neutrons less likely to simply be captured without causing fission or spallation?

A: Yes.

Q: Is a neutron a spin 1/2 particle?

A: Yes, that is, it is a fermion with intrinsic angular momentum equal to 1/2 ħ, where ħ is the reduced Planck constant.

Q: Is a neutron a free neutron that is Boltzmann distributed with kT= 0.0253 eV at room temperature?

A: Yes.

Q: Are neutrons complementary to the latter in terms of atomic contrasts by different scattering cross sections?

A: Yes, sensitivity to magnetism; energy range for inelastic neutron spectroscopy; and deep penetration into matter.

Q: Are neutrons thermal neutrons that have been equilibrated in a very cold substance such as liquid deuterium?

A: Yes.

Q: Is a neutron composed of one up quark and two down quarks?

A: Yes, The magnetic moment of the neutron can be modeled as a sum of the magnetic moments of the constituent quarks.

Q: Is a neutron given by μn= 4/3 μd − 1/3 μu?

A: Yes, where μd and μu are the magnetic moments for the down and up quarks, respectively.

Q: Are neutrons able to cause fission in ordinarily non-fissile materials?

A: Yes, such as depleted uranium , and these materials have been used in the jackets of thermonuclear weapons.

Q: Is a neutron subject to the Pauli exclusion principle?

A: Yes, two neutrons cannot have the same quantum numbers.

Q: Are neutrons used in boron capture therapy to treat cancer?

A: Yes.

Q: Is a neutron the antiparticle of the neutron?

A: Yes.

Q: Is a neutron held together by the strong force?

A: Yes, and mediated by gluons.

Q: Is a neutron ×10−5?

A: Yes, Since the difference is only about two standard deviations away from zero, this does not give any convincing evidence of CPT-violation.

Q: Was a neutron a spin 3/2 particle lingered?

A: Yes.

Q: Are neutrons produced by elastically scattering cold neutrons in substances with a temperature of a few kelvins?

A: Yes, such as solid deuterium or superfluid helium.

Q: Is a neutron a free neutron with a kinetic energy level close to 1 MeV , hence a speed of ~14000 km/s?

A: Yes, They are named fission energy or fast neutrons to distinguish them from lower-energy thermal neutrons, and high-energy neutrons produced in cosmic showers or accelerators.

Q: Are neutrons produced copiously in nuclear fission and fusion?

A: Yes.

Q: Is a neutron included in this table?

A: Yes.

Q: Is a neutron essential to the production of nuclear power?

A: Yes.

Q: Is a neutron unstable, decaying to a proton, electron and antineutrino with a mean lifetime of just under 15 minutes?

A: Yes, This radioactive decay, known as beta decay, is possible because the mass of the neutron is slightly greater than the proton.

Q: Is a neutron unaffected by electric fields?

A: Yes.

Q: Was a neutron discovered by James Chadwick in 1932?

A: Yes, and neutrons were used to induce many different types of nuclear transmutations.

Q: Are neutrons extremely efficient at ionization and far more likely to cause cell death than X-rays or protons?

A: Yes.

Q: Are neutrons also possible?

A: Yes, but is hindered because positrons are repelled by the positive nucleus, and quickly annihilate when they encounter electrons.

Q: Are neutrons very much like that of protons?

A: Yes, and save for the difference in quark composition with a down quark in the neutron replacing an up quark in the proton.

Q: Are neutrons a necessary constituent of any atomic nucleus that contains more than one proton?

A: Yes, Neutrons bind with protons and one another in the nucleus via the nuclear force, effectively moderating the repulsive forces between the protons and stabilizing the nucleus.

Q: Are neutrons to excite delayed and prompt gamma rays from elements in materials?

A: Yes.

Q: Are neutrons particularly valuable for neutron scattering experiments?

A: Yes.

Q: Is a neutron viewed as two quantum states of the same particle?

A: Yes, and is used to model the interactions of nucleons by the nuclear or weak forces.

Q: Are neutrons unstable and have a mean lifetime of 881?

A: Yes.

Q: Is a neutron influenced by magnetic fields?

A: Yes.

Q: Is a neutron a neutral particle?

A: Yes, and the magnetic moment of a neutron is not zero.

Q: Is a neutron classified as a generic particle called hadron?

A: Yes, because it is made of quarks.

Q: Are neutrons bound together through the nuclear force?

A: Yes, and neutrons are required for the stability of nuclei.

Q: Are neutrons unstable?

A: Yes, although they have the longest half-life of any unstable subatomic particle by several orders of magnitude.

Q: Is a neutron also classified as a baryon?

A: Yes, because it is composed of three quarks.

Q: Are neutrons likely to create radioactive waste?

A: Yes, but the waste is composed of neutron-activated lighter isotopes, which have relatively short decay periods as compared to typical half-lives of 10,000 years for fission waste, which is long due primarily to the long half-life of alpha-emitting transuranic actinides.

Q: Are neutrons produced by nuclear processes such as nuclear fission?

A: Yes.