Dispersive refraction of different light-to-heavy materials at MeV $\gamma$-ray energies
| Autor: | Günther, M. M., Volotka, A. V., Jentschel, M., Fritzsche, S., Stöhlker, Th., Thirolf, P. G., Zepf, M. |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Phys. Rev. A 97, 063843 (2018) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.97.063843 |
| Popis: | The dispersive behavior of materials with atomic charge numbers varing from $Z = 4$ (beryllium, Be) to $Z = 82$ (lead, Pb) was investigated experimentally and theoretically at $\gamma$-ray energies up to 2 MeV. The experiment was performed at the double-crystal gamma spectrometer GAMS6 of the ILL in Grenoble. The experimental results were compared with theoretical calculations which account for all major elastic processes involved. Overall, we found a good agreement between theory and experiment. We find that for the development of refractive optics at $\gamma$-ray energies beyond those currently in use high-Z materials become increasingly attractive compared to the beryllium lens-stacks used at X-ray energies. Comment: submitted to Phys. Rev. A |
| Databáze: | arXiv |
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