Mutual annihilation is the term we usually apply in physics to the combining of a particle and its antiparticle. Under the circumstances, the particles are completely converted into energy. That is, their entire mass is converted into electromagnetic energy. Let's look a bit more closely.
What we usually encounter is mutual annihilation events in the form of positrons interacting with electrons. The positron is the anti-particle of the electron, and shortly after the creation of the positron (either in beta plus nuclear decay or pair production), the positron will "combine" with an electron, and both particles will be completely converted into energy. This energy appears in the form of two energetic gamma rays going in opposite directions. Each gamma ray has an energy of about 0.511 MeV, or more, depending on the kinetic energy of the positron and electron that interact to release them. Links can be found below for more information.
If a quark and anti-quark collide, they could scatter. But it is also possible (with increasing probability at lower energies) that they undergo what is called mutual annihilation. In mutual annihilation, both particles are converted entirely into energy. Quarks, it should be noted, cannot exist by themselves. It should also be noted that there are some particles created by quark-antiquark pairs. These particles, like the J/psi meson, are short-lived, but do exist. Investigators are still working on a better understanding of quarks and the relationship between the strong, weak and electromagnetic interactions.
Positrons don't last long because they are anti-electrons; they are antimatter. And they will combine with an electron after their appearance, and do so in a relatively short period of time. Both particles are oppositely charged and attract each other. And in an event called mutual annihilation, the total mass of both the positron and the electron are converted into energy.
World annihilation comes to mind.
They developed a mutual friendship.
A PET scanner is a positron emission tomography imaging system. It takes advantage of the fact that some radioisotopes undergo radioactive decay by the emission of a positron. This form of decay, by the way, is beta decay, or beta plus decay, to be more specific. The positron is a form of anti-matter, and it is actually an anti-matter electron.When a positron is emitted from an atomic nucleus, it travels a short distance (slowing down all the while), and then "combines" with an electron in what is called mutual annihilation. When a positron and electron capture each other, their entire mass is converted into electromagnetic energy. This energy appears in the form of two high energy gamma rays, and they leave the event in opposite directions (to be picked up by a pair of detectors). That is the connection of gamma rays to the PET scanner.There is a bit more to the machine, as the pair of detectors is rotated about what is to be imaged. Further, whatever is to be imaged is moved through the "ring" about which the detectors spin. The connection between the machine and the gamma ray has, however, been established. The PET scanner detects the gamma rays emitted from the mutual annihilation of positrons and electrons.
The alternatives are either annihilation (possibly mutual) or taking to the hills to carry on guerrilla combat, perhaps for years.
by both nations detering one another with assured mutual annihilation or something like that
Total Annihilation happened in 1997.
Celebration of Annihilation was created in 1996.
"Annihilation" by Jeff VanderMeer has for around 195 pages.
Assimilation and annihilation are both controversial methods for promoting unity among diverse groups. Assimilation involves integrating different cultures into a dominant one, while annihilation seeks to eliminate differences altogether. However, assimilation is generally considered more effective in fostering unity and understanding, as it allows for the preservation of cultural identities while promoting cooperation and mutual respect. Annihilation, on the other hand, can lead to conflict, resentment, and the loss of valuable diversity.
Balanced Annihilation
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Annihilation of Civilization was created on 1989-04-03.
Annihilation - novel - was created on 2004-06-01.