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The emission of a positron also results in the creation of a?
When an atomic nucleus releases a positron, it has undergone beta plus decay. This nuclear transformation event also will release a neutrino. Use the link below for more information.
Why do positron emission and electron capture have the same effect on a nucleus?
The reason positron emission and electron capture have the same effect on the nucleus of an atom is because the resulting atom undergoes nuclear transformation, and the new element will have one less proton and one more neutron than the precursor element. Both of these nuclear changes are interesting, so let's look a bit more closely. In positron emission (also called beta plus decay), a proton in the nucleus of an atom "changes" into a neutron and a positron is ejected. This results in one less proton in that nucleus (naturally), and the creation of a new element. And because the proton had become a neutron, the nucleus has the same number of nucleons and a similar atomic weight. In electron capture, a nucleus with "too many" protons will actually "pull in" an electron and take it into its nucleus. This electron will "combine" with a proton, and a neutron will result. This will reduce the number of protons in the nucleus, and the creation of a new element -- just like in positron emission. Links to related questions can be found below.
What decay occurs when a nucleus emits an electron in the process of a proton decaying into a neutron?
The decay process you are referring to is called beta-plus decay, also known as positron emission. In this process, a proton within the nucleus transforms into a neutron by emitting a positron (anti-electron) and an electron neutrino. This results in a decrease of one in the atomic number of the nucleus while the mass number remains constant.
What is the equation of a positron emission from silicon?
Silicon-26 is a synthetic isotope of silicon; it is a man-made isotope. Additionally, silicon-26 is pretty unstable, and it has a half life of only about 2.234 seconds. This unstable isotope of silicon undergoes beta plus decay, which is also called positron emission. The result is the creation of an atom of aluminum. In the positron emission of silicon-26, let's start with the equation. Here it is: 1426Si => 1326Al + e+ Here we see Si-26 become Al-26. Inside the silicon-26 nucleus, the weak interaction (weak force) mediates the conversion of a proton into a neutron. When that happens, the silicon atom changes into an aluminum atom because there is one less proton in that used-to-be silicon nucleus. The atom's atomic number goes down by one, and the silicon becomes aluminum. This is an example of nuclear transmutation; it is the conversion of one element into another. We also see a positron (e+) leave the nucleus in the event, and this is why we sometimes call this type of beta decay positron emission. The positron that leaves this decay event has a great deal of kinetic energy, and it's really flying when it is ejected from the nucleus. The Al-26 that results is itself unstable, and the excited nucleus is a gamma emitter. Eventually though, the Al-26 "settles down" a bit. It has a really long half-life - some 7.17 x 105 years. It, too, will eventually decay, but it might undergo beta plus decay, or it could undergo electron capture. In either case, it becomes magnesium-26, which is stable.
What is a positron?
A positron is a positively charged electron. It's an antielectron - antimatter! The positron has a charge of +1 (just the opposite of the -1 of the electron), and a spin of 1/2 as an electron does. The mass of this elementary particle is about 9.103826 x 10-31 kg. The actual charge on this particle is about +1.602 x 10-19 coulombs. We write it as β+ or e+ in nuclear equations. It was Paul Dirac who first theorized that it may exist back in 1928, and in 1932, Carl D. Anderson discovered and named the positron. How was it done? By allowing cosmic rays to pass through a cloud chamber shielded with lead and set up in a magnetic field, the electron-positron pairs that were sometimes created could be observed. Once created, the particles moved (curved) in opposite directions within the magnetic field. Simple and clever! It should be noted that Caltech graduate student Chung-Yao Chao is credited with detecting the positron in 1930, but he was unable to explain it. We should also note that the positron is emitted (positron emission) in beta plus decay, which is a form of radioactive decay. Pair production, the "conversion" of electromagnetic energy into a positron and an electron, is also a source of positrons. Regardless of the source, the positron will always seek to "combine" with any nearby electron with the mass of both particles being converted into electromagnetic energy (a pair of gamma rays). A more detailed description and some of the other characteristics of the positron can be found in the Wikipedia article on that subject. A link is provided below to that post and also to some Related questions that will aid in understanding this critter.
The emission of a positron also results in the creation of a?
When an atomic nucleus releases a positron, it has undergone beta plus decay. This nuclear transformation event also will release a neutrino. Use the link below for more information.
Why do positron emission and electron capture have the same effect on a nucleus?
The reason positron emission and electron capture have the same effect on the nucleus of an atom is because the resulting atom undergoes nuclear transformation, and the new element will have one less proton and one more neutron than the precursor element. Both of these nuclear changes are interesting, so let's look a bit more closely. In positron emission (also called beta plus decay), a proton in the nucleus of an atom "changes" into a neutron and a positron is ejected. This results in one less proton in that nucleus (naturally), and the creation of a new element. And because the proton had become a neutron, the nucleus has the same number of nucleons and a similar atomic weight. In electron capture, a nucleus with "too many" protons will actually "pull in" an electron and take it into its nucleus. This electron will "combine" with a proton, and a neutron will result. This will reduce the number of protons in the nucleus, and the creation of a new element -- just like in positron emission. Links to related questions can be found below.
What does uranmium emit?
Mostly Alpha radiation, but some isotopes also decay by positron emission or Electron capture instead.
What decay occurs when a nucleus emits an electron in the process of a proton decaying into a neutron?
The decay process you are referring to is called beta-plus decay, also known as positron emission. In this process, a proton within the nucleus transforms into a neutron by emitting a positron (anti-electron) and an electron neutrino. This results in a decrease of one in the atomic number of the nucleus while the mass number remains constant.
Why are protons converted into neutrons during positron emission?
Protons are converted into neutrons during positron emission to satisfy certain conservation laws, like charge and baryon number. The following reaction takes place during positron emission: p+ --> n + e+ + ve, where p+ is a proton, n is a neutron, e+ is a positron (antielectron), and ve is an electron neutrino. Charge is +1 on both sides of the reaction, and so is conserved. Baryonic number is 1 on both sides of the reaction (both the p+ and the n have baryonic numbers of 1), and so is conserved. Also, lepton number is 0 on both sides of the reaction (e+ has a lepton number of -1 while ve has one of +1, thus adding up to zero), and so is conserved.
What is the equation of a positron emission from silicon?
Silicon-26 is a synthetic isotope of silicon; it is a man-made isotope. Additionally, silicon-26 is pretty unstable, and it has a half life of only about 2.234 seconds. This unstable isotope of silicon undergoes beta plus decay, which is also called positron emission. The result is the creation of an atom of aluminum. In the positron emission of silicon-26, let's start with the equation. Here it is: 1426Si => 1326Al + e+ Here we see Si-26 become Al-26. Inside the silicon-26 nucleus, the weak interaction (weak force) mediates the conversion of a proton into a neutron. When that happens, the silicon atom changes into an aluminum atom because there is one less proton in that used-to-be silicon nucleus. The atom's atomic number goes down by one, and the silicon becomes aluminum. This is an example of nuclear transmutation; it is the conversion of one element into another. We also see a positron (e+) leave the nucleus in the event, and this is why we sometimes call this type of beta decay positron emission. The positron that leaves this decay event has a great deal of kinetic energy, and it's really flying when it is ejected from the nucleus. The Al-26 that results is itself unstable, and the excited nucleus is a gamma emitter. Eventually though, the Al-26 "settles down" a bit. It has a really long half-life - some 7.17 x 105 years. It, too, will eventually decay, but it might undergo beta plus decay, or it could undergo electron capture. In either case, it becomes magnesium-26, which is stable.
What can be emmited from radioactive decay?
Many particles can be emitted from radioactive decay. We have Internal Conversion in which a nucleus transfers the energy to an electron which then releases it. There is also Isometric Transition which is basically the gamma ray (photon). There is the decay in which a nucleon is emitted. In this scenario we can have an alpha decay (in which an alpha particle decays), a proton emission, a neutron emission, double proton emission (two protons are emitted), spontaneous fission (the nucleus brakes down into two smaller nuclei and/or other particles) and we have the cluster decay (where the nucleus emits a smaller nucleus). There is the beta decay too. There is the Beta decay (electron and electron antineutrino are emitted), positron emission (a positron and an electron neutrino are emitted), electron capture (an electron is captured by the nucleus and a neutrino is emitted), bound state beta decay (the nucleus decays to an electron and an antineutrino but here the electron is not emitted since it is captured into a K-shell), double beta decay (two electrons and two antineutrinos are emitted), double electron capture (the nucleus absorbs two electrons and emits two neutrinos), electron capture with positron emission (an electron is absorbed and a positron is emitted along with two neutrinos), and double positron emission (in which the nucleus emits two positrons and two neutrons).
What is a positron?
A positron is a positively charged electron. It's an antielectron - antimatter! The positron has a charge of +1 (just the opposite of the -1 of the electron), and a spin of 1/2 as an electron does. The mass of this elementary particle is about 9.103826 x 10-31 kg. The actual charge on this particle is about +1.602 x 10-19 coulombs. We write it as β+ or e+ in nuclear equations. It was Paul Dirac who first theorized that it may exist back in 1928, and in 1932, Carl D. Anderson discovered and named the positron. How was it done? By allowing cosmic rays to pass through a cloud chamber shielded with lead and set up in a magnetic field, the electron-positron pairs that were sometimes created could be observed. Once created, the particles moved (curved) in opposite directions within the magnetic field. Simple and clever! It should be noted that Caltech graduate student Chung-Yao Chao is credited with detecting the positron in 1930, but he was unable to explain it. We should also note that the positron is emitted (positron emission) in beta plus decay, which is a form of radioactive decay. Pair production, the "conversion" of electromagnetic energy into a positron and an electron, is also a source of positrons. Regardless of the source, the positron will always seek to "combine" with any nearby electron with the mass of both particles being converted into electromagnetic energy (a pair of gamma rays). A more detailed description and some of the other characteristics of the positron can be found in the Wikipedia article on that subject. A link is provided below to that post and also to some Related questions that will aid in understanding this critter.
What can positrons do?
Positrons are anti-electrons; they're antimatter. There are a couple of sources of positrons, and in our universe, the positron is looking for an electron to combine with so it can return from whence it came. This process, called mutual annihilation, sees the positron combine with the electron to produce two fairly high energy gamma rays (leaving the scene in opposite directions). In another universe, an antimatter one, the positron orbits around antimatter atomic nuclei. It also forms positricity in that universe. The positron is also used in medical imaging in positron emission tomography (PET) scans. The positron doesn't have a lot of penetrating power, and it won't travel far after it is released. But it is worth noting that those gamma rays that are released when a positron and an electron mutually annihilate each other are pretty high energy ones. They have a lot of penetrating power, and they can do considerable biological damage if a living thing is exposed to a positron source for too long. The PET scan only ends up "minimally exposing" an individual during the procedure, in case you're wondering. Links can be found below for more information.
Documents to keep in the car?
Your insurance card and registration are required. Some states also require that you keep emission test results there.
What is the anti-matter equivalent of an electron?
The anti-matter equivalent of an electron is a positron. Positrons have the same mass as electrons but have a positive charge. When a positron and an electron collide, they annihilate each other, releasing energy in the form of gamma rays.
What is the anti-particle of an electron?
That is called an anti-electron, also known as a positron.That is called an anti-electron, also known as a positron.That is called an anti-electron, also known as a positron.That is called an anti-electron, also known as a positron.
