High-Energy $\gamma$ -Ray Source from Electron-Positron Pair Annihilation

Journal Article · 01 February 1965 · Physical Review

DOI: https://doi.org/10.1103/PhysRev.137.B730 · OSTI ID:1444159

Tsai, Yung-Su ^[1]

---

1. Stanford Univ., CA (United States). Stanford Linear Accelerator Center

Problems associated with the use of the process e⁺+e^-→2$$\gamma$$ as a source for high-energy $$\gamma$$ rays are investigated. The polarization of the $$\gamma$$'s is shown to be negligible at high energies. The spread of $$\gamma$$ spectra at a fixed angle due to radiative corrections is investigated. Terms like ($$\frac{a}{π}$$) 1n² ($$\frac{4E^2}{m^2}$$) are associated with infrared divergence and disappear with a reasonable energy resolution. The result is very similar to Schwinger's corrections without vacuum polarization. Our result was found to be also usable in the colliding-beam experiment without any modification, under certain conditions.

• Research Organization: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: AC02-76SF00515
• OSTI ID: 1444159
• Report Number(s): SLAC-PUB-0045; PHRVAO
• Journal Information: Physical Review, Vol. 137, Issue 3B; ISSN 0031-899X
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English