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Pair production, from high energy radiation

Range parameter, b (nm), estimated from the radiation yield of scavenger products formed during scavenging of ion-pairs produced in hydrocarbon solvents by high-energy radiolysis... [Pg.187]

A gamma-ray line at 0.511 MeV results from the mutual annihilation of an electron and a positron, a particle-antiparticle pair. A number of radioactive decay chains (see Table I) result in the emission of a positron as a decay product, which will annihilate upon first encounter with an electron. Also of astrophysical importance is the production of electrons and positrons via the photon-photon pair-creation process. Such pair plasmas are found in the vicinity of compact objects, such as neutron stars and black holes, that are associated with heated accretion disks and relativistic flows and jets, within which particle acceleration is known to occur. Thus, relatively narrow lines of 0.511-MeV annihilation radiation are expected to arise in the interstellar medium through the decay of dispersed, nucleosynthetic radionuclides, while broadened, Doppler-shifted, and possibly time-variable lines may occur in the high-energy and dense environments associated with compact objects. [Pg.72]


See other pages where Pair production, from high energy radiation is mentioned: [Pg.135]    [Pg.135]    [Pg.254]    [Pg.748]    [Pg.436]    [Pg.122]    [Pg.6]    [Pg.159]    [Pg.376]    [Pg.2]    [Pg.10]    [Pg.107]    [Pg.413]    [Pg.525]    [Pg.68]    [Pg.970]    [Pg.457]    [Pg.34]    [Pg.116]    [Pg.36]    [Pg.222]    [Pg.19]    [Pg.114]    [Pg.417]    [Pg.23]    [Pg.1463]    [Pg.42]    [Pg.456]    [Pg.319]    [Pg.402]    [Pg.51]    [Pg.52]    [Pg.255]   
See also in sourсe #XX -- [ Pg.187 , Pg.319 , Pg.320 ]




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Energy from

Energy product

Energy production

High production

High-energy

Pair energy

Pair production

Productive energy

Radiation energy

Radiation energy from

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