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What is the half-life of a neutron source?
How can you get half a neutron?
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the element that can be used as a neutron source is beryllium
It helps keep the nucleus of most atoms together, through the "strong force".
No it could not most stars burn helium and hydrogen to give light and heat neutron stars are made of only neutrons and gives off little light and the gravity is extremely high… compared to a normal star if a earth like planet orbited a neutron star the stars gravity well ( is the pull of gravity that a large body in space exerts. The larger the body (the more mass) the greater the gravity well it has. The Sun has a large (or deep) gravity well) then its gravity well would most likely pull earth into the neutron star so fast and so hard it would smash the planet apart
neutrons are produced at a rate of 2.8x10+6 neutrons/second/curie Am-241 for an optimally, well mixed source of americium and beryllium. the neutron dose rate of a one curi…e Am-Be source would be 34.7 mR/hr (or 347 µSv/hr) at 30 cm. the gamma dose rate of a one curie Am-Be source would be 0.17 mR/hr (or 17 µSv/hr) at 30 cm. americium-241 also decays by spontaneous fission with a half life of 2x10+14 years, producing 0.18 neutrons/second/curie Am-241. note that beryllium is not required for this neutron production mechanism.
Neutrons A neutron is a subatomic particle; it is one of the building blocks of the atom. As such, it is found in the nucleus of an atom. The neutron has an atomic mass of abo…ut 1.00865 u, and a mass of about 1.675 x 10-27 kg. Its spin is +1/2 and that makes it a fermion. Additionally, it has no electric charge. A neutron is composed of two down quarks and an up quark, and these are bound together by the strong interaction (strong force). A neutron is unstable when free in nature, and has a half life of about 886 seconds. The neutron could be said to be only "alive" to be part of an atomic nucleus as it ceases to exist after a while if left alone. When it wanders around loose, like after its release following a decay event or a fission event, it may bump into another atomic nucleus and become captured by it. This process is called - no surprise - neutron capture. It is, after all, a nucleon, as is a proton, both of which make up an atomic nucleus. When a neutron decays, a decay mediated by the weak interaction, it releases a proton (or, if you prefer, a hydrogen nucleus). Additionally, an electron, and an antineutrino are ejected. If you recognize this as beta minus decay, you are correct. It is possible that you know that a neutron or neutrons are released in nuclear fission, and we build machines to take advantage of this phenomenon. These machines also take advantage of neutron capture leading to nuclear fission, and the building of a nuclear chain reaction. It is nuclear weapons and nuclear reactors that we build, and for fairly well known purposes. Wikipedia has some good data on this little critter, which is where a couple of these facts came from. A link is provided below so you can slide on over.
Neutrons are particles in the nucleus of an atom which have slightly more mass than a proton. They contain neither a positive nor a negative charge. Neutrons bind with the pro…tons in the nucleus, and are stable there. If they are insufficient in number, or there are too many, they may cause the atom to be unstable and radioactive. When they are not bound into an atom, they do not last long, and have a half life of just a bit less than 15 minutes (886 seconds).
Uranium-235 undergoes a small rate of natural spontaneous fission, so there are always some neutrons being produced even in a fully shutdown reactor. When the control rods are… withdrawn and criticality is approached the number increases because the absorption of neutrons is being progressively reduced, until at criticality the chain reaction becomes self sustaining. Note that sometimes a neutron source is provided in the reactor, but this is not essential to start the chain reaction, it is to give a shutdown neutron population which is detectable by instruments and so make the approach to critical more observable. The reactor will go critical at the same control rod position whether a source is loaded or not.