Positron annihilation in a strong magentic field.
Positron annihilation in a strong magentic field.
Positron annihilation in a strong magentic field.
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S<<strong>strong</strong>>in</<strong>strong</strong>>gle photon <<strong>strong</strong>>annihilation</<strong>strong</strong>><br />
In a <strong>field</strong> B close to B 0<br />
the s<<strong>strong</strong>>in</<strong>strong</strong>>gle photon <<strong>strong</strong>>annihilation</<strong>strong</strong>> is possible:<br />
.<br />
γ( k, ε)<br />
e - () p () q e +<br />
.<br />
cross section<br />
≈ α<br />
(In free space this process is forbidden.)<br />
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