High-Z crystals for gamma-ray optics

被引：1

作者：

Rousselle, J. ^{[1
,2
]}

von Ballmoos, P. ^{[1
,2
]}

Barriere, N. ^{[3
]}

Abrosimov, N. V. ^{[4
]}

Bastie, P. ^{[5
]}

Bonnetto, G. ^{[6
]}

Camus, T. ^{[1
,2
]}

Courtois, P. ^{[7
]}

Jentschel, M. ^{[7
]}

Lecomte, E. ^{[1
,2
]}

Riviere, E. ^{[8
]}

Roudil, G. ^{[1
,2
]}

机构：

[1] Univ Toulouse, UPS, CESR, 9 Ave Colonel Roche, F-31028 Toulouse 9, France

[2] CNRS, UMR5187, F-31028 Toulouse, France

[3] IASF Roma, INAF, I-00133 Rome, Italy

[4] IKZ, D-12489 Berlin, Germany

[5] LSP, UMR 5588, F-38402 St Martin Dheres, France

[6] Thales Alenia Space, F-06150 Cannes, France

[7] ILL Grenoble, F-38042 Grenoble, France

[8] CNES, F-31401 Toulouse, France

来源：

OPTICS FOR EUV, X-RAY, AND GAMMA-RAY ASTRONOMY IV | 2009年 / 7437卷

关键词：

Laue lens; gamma-rays; Bragg diffraction; mosaic crystals; nuclear astrophysics;

D O I：

10.1117/12.825245

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In a Laue lens a large number of crystals are disposed on concentric rings such as they diffract via Bragg-diffraction 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.

引用

页数：10

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