TY  - JOUR
AU  - Günther, Marc
AU  - Volotka, A. V.
AU  - Jentschel, M.
AU  - Fritzsche, S.
AU  - Stöhlker, Th.
AU  - Thirolf, P. G.
AU  - Zepf, M.
TI  - Dispersive refraction of different light to heavy materials at MeV γ -ray energies
JO  - Physical review / A
VL  - 97
IS  - 6
SN  - 2469-9926
CY  - Woodbury, NY
PB  - Inst.
M1  - GSI-2018-00859
SP  - 063843
PY  - 2018
AB  - The dispersive behavior of materials with atomic charge numbers varying from Z=4 (beryllium, Be) to Z=82 (lead, Pb) was investigated experimentally and theoretically at γ-ray energies up to 2 MeV. The experiment was performed at the double-crystal γ spectrometer GAMS6 of the Institut Laue-Langevin 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 γ-ray energies beyond those currently in use, high-Z materials become increasingly attractive compared to the beryllium lens-stacks used at x-ray energies.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000435804400007
DO  - DOI:10.1103/PhysRevA.97.063843
UR  - https://repository.gsi.de/record/213299
ER  -