Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 33: Collisions, scattering and recombination

A 33.7: Vortrag

Donnerstag, 26. März 2015, 16:00–16:15, C/kHS

Pair creation with channeling ions — •Nikolay Belov and Zoltán Harman — Max Planck Institute for Nuclear Physics, Saupfercheckweg 1, 69126 Heidelberg

The creation of particle-antiparticle pairs plays a role in several physical enviroments. We suggest an alternative way to investigate this phenomenon by the channeling of accelerated heavy ions through a crystal. In the framework of the ion, the energy of virtual photons arising from the periodic crystal potential may exceed the thresold 2mc2. This scheme increases the pair production rate coherently and allows to provide a more precise investigation of nuclear pair conversion [1]. It also allows to depopulate nuclei in metastable states, and convert the nuclear energy stored to electron-positron pairs. Pair creation by channeling ions can be also regarded as an extension of the resonance coherent excitation of highly charged ions to higher frequencies and higher ion velocities, which has been investigated at the GSI before [2]. Therefore, this novel channel of pair creation can be examined at the upcoming FAIR facility in the nearest future.

[1] N. A. Belov, Z. Harman, arXiv:1411.5711(2014).

[2] Y. Nakano, Y. Takano, T. Ikeda, et al., Phys. Rev. A 87, 060501 (2013).

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