A SHORT NOTE ON THE ELECTRON-POSITRON PAIR CREATION

2021 ◽  
pp. 1-8
Author(s):  
Eduardo De Paiva
Keyword(s):  
Short Note ◽  
Pair Creation ◽  
Electron Positron ◽  
Electron Positron Pair

scholarly journals A Short Note On The Electron-Positron Pair Creation

2017 ◽  
Vol 38 (1) ◽  
pp. 101
Author(s):  
Eduardo De Paiva
Keyword(s):  
Short Note ◽  
Pair Creation ◽  
Electron Positron ◽  
Electron Positron Pair

A criação de pares elétron-pósitron é um dos vários mecanismos de interação do fóton com a matéria e o par pode ser produzido quando o fóton interage com um núcleo atômico ou com um elétron. As energias limiares do fóton kth para estas reações são respectivamente ~ 2m0c2 ou 4m0c2 (m0 é a massa de repouso do elétron e c é a velocidade da luz no vácuo). Um aspecto interessante da criação de par elétron-pósitron ocorre quando um fóton de energia muito baixa (k << m0c2) colide com um elétron ultra-relativístico (E >> m0c2). Nesta nota a cinemática da colisão entre um elétron e um fóton é revista e o aspecto particular e interessante da produção de tripleto quando elétrons ultra-relativísticos colidem com fótons de baixíssimas energias é brevemente descrito.

Vacuum polarization and particle creation in the presence of a potential step

2016 ◽  
Vol 31 (02n03) ◽  
pp. 1641031 ◽  
Author(s):  
S. P. Gavrilov ◽  
D. M. Gitman
Keyword(s):  
Electric Potential ◽  
Canonical Quantization ◽  
Particle Creation ◽  
Pair Creation ◽  
Dirac Field ◽  
Potential Step ◽  
Electron Positron ◽  
Physical Impact ◽  
Particle Interpretation ◽  
Electron Positron Pair

We consider QED with strong external backgrounds that are concentrated in restricted space areas. The latter backgrounds represent a kind of spatial x-electric potential steps for charged particles. They can create particles from the vacuum, the Klein paradox being closely related to this process. We describe a canonical quantization of the Dirac field with x-electric potential step in terms of adequate in- and out-creation and annihilation operators that allow one to have consistent particle interpretation of the physical system under consideration and develop a nonperturbative (in the external field) technics to calculate scattering, reflection, and electron-positron pair creation. We resume the physical impact of this development.

scholarly journals Modes of Energy Loss from Isolated Magnetized Neutron Star

1987 ◽  
Vol 125 ◽  
pp. 450-450
Author(s):  
S. Shibata
Keyword(s):  
Magnetic Field ◽  
Neutron Star ◽  
Gamma Ray ◽  
Rotational Energy ◽  
Pair Creation ◽  
Dipole Radiation ◽  
Pair Plasma ◽  
Electron Positron ◽  
Closed Current ◽  
Electron Positron Pair

Pulsar may be regarded as a discharge tube by electron-positron pair creation. On this viewpoint we carry out two numerical calculations. The obtained magnetic field is consistent with the flow. We find that pulsars emit their rotational energy through three modes simultaneously. The three modes are (1)relativistic acceleration and following gamma-ray emission in the closed current circuit in the magnetosphere, (2)wind of the electron-positron pair plasma, and (3)dipole radiation.

scholarly journals Electron-positron pair creation in the electric fields generated by micro-bubble implosions

2020 ◽  
Vol 384 (34) ◽  
pp. 126854
Author(s):  
James K. Koga ◽  
Masakatsu Murakami ◽  
Alexey V. Arefiev ◽  
Yoshihide Nakamiya ◽  
Stepan S. Bulanov ◽  
...  
Keyword(s):  
Electric Fields ◽  
Pair Creation ◽  
Electron Positron ◽  
Micro Bubble ◽  
Electron Positron Pair
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