Figure 3.22 (a) A photon cannot decay into an electron- positron pair in free space, but (b) if a nucleus is nearby, the Photon Photon Nucleus Nucleus nucleus can absorb sufficient linear momentum to allow the Before After Before After process to procced. (a) Free space (cannot occur) (b) Beside nucleus
Figure 3.22 (a) A photon cannot decay into an electron- positron pair in free space, but (b) if a nucleus is nearby, the Photon Photon Nucleus Nucleus nucleus can absorb sufficient linear momentum to allow the Before After Before After process to procced. (a) Free space (cannot occur) (b) Beside nucleus
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Show that a photon cannot produce an electron-positron pair in free space as shown in Figure
Transcribed Image Text:Figure 3.22 (a) A photon
cannot decay into an electron-
positron pair in free space, but
(b) if a nucleus is nearby, the
Photon
Photon
Nucleus
Nucleus
nucleus can absorb sufficient
linear momentum to allow the
Before
After
Before
After
process to procced.
(a) Free space (cannot occur)
(b) Beside nucleus
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