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Journal Article

Pair creation in heavy ion channeling

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Belov,  Nikolay
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;

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Harman,  Zoltan
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;

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1411.5711.pdf
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Citation

Belov, N., & Harman, Z. (2016). Pair creation in heavy ion channeling. Physics Letters B, 755, 150-154. doi:10.1016/j.physletb.2016.01.064.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002A-1312-D
Abstract
Heavy ions channeling through crystals with multi-GeV kinetic energies can create electron-positron pairs. In the framework of the ion, the energy of virtual photons arising from the periodic crystal potential may exceed the threshold $2mc^2$. The repeated periodic collisions with the crystal ions yield high pair production rates. When the virtual photon frequency matches a nuclear transition in the ion, the production rate can be resonantly increased. In this two-step excitation-pair conversion scheme, the excitation rates are coherently enhanced, and they scale approximately quadratically with the number of crystal sites along the channel.