J. Rousselle,1,2 P. von Ballmoos,1,2 N. Barrière,3 N. V. Abrosimov,4 P. Bastie,5 G. Bonnetto,6 T. Camus,1,2 P. Courtois,7 M. Jentschel,7 E. Lecomte,1,2 E. Rivière,8 G. Roudil1,9
1CESR, UPS, Univ. of Toulouse (France) 2UMR 5187, CNRS (France) 3INAF-IASF (Italy) 4IKZ (Germany) 5LSP (France) 6Thales Alenia Space (France) 7ILL (France) 8Ctr. National d'Études Spatiales (France) 9CNRS (France)
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In a Laue lens a large number of crystals are disposed on concentric rings such as they diffract via Braggdiffraction
the incident gamma-rays onto a common focal spot. Compact structured high-Z mosaic-crystals are
among the most efficient diffraction media for the domain of nuclear astrophysics (i.e. 300 keV ≤ E ≤ 1.5 MeV).
We have studied the potential of various high-Z crystals such as Ir, W, Au, Ag, Pt, Rh and AsGa for a Laue
lens application. The diffraction performance of gold, silver and platinum crystals have been measured during
runs at the European Synchrotron Radiation Facility and in a reactor-beamline at the Institut Laue Langevin,
Grenoble in France. Several of the tested high-Z materials show outstanding performances with reflectivities
reaching the theoretical limits for mosaic-crystals, and hence open the way towards efficient focusing optics at
MeV energies.
J. Rousselle,P. von Ballmoos,N. Barrière,N. V. Abrosimov,P. Bastie,G. Bonnetto,T. Camus,P. Courtois,M. Jentschel,E. Lecomte,E. Rivière, andG. Roudil
"High-Z crystals for gamma-ray optics", Proc. SPIE 7437, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IV, 74370L (31 August 2009); https://doi.org/10.1117/12.825245
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J. Rousselle, P. von Ballmoos, N. Barrière, N. V. Abrosimov, P. Bastie, G. Bonnetto, T. Camus, P. Courtois, M. Jentschel, E. Lecomte, E. Rivière, G. Roudil, "High-Z crystals for gamma-ray optics," Proc. SPIE 7437, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IV, 74370L (31 August 2009); https://doi.org/10.1117/12.825245