High-efficiency diffraction and focusing of X-rays through asymmetric bent crystalline planes

被引：0

作者：

Bellucci, Valerio ^{[1
]}

Paternò, Gianfranco ^{[1
]}

Camattari, Riccardo ^{[1
]}

Guidi, Vincenzo ^{[1
]}

Jentschel, Michael ^{[1
]}

Bastie, Pierre ^{[1
]}

机构：

[1] Bellucci, Valerio

[2] Paternò, Gianfranco

[3] Camattari, Riccardo

[4] Guidi, Vincenzo

[5] Jentschel, Michael

[6] Bastie, Pierre

来源：

Guidi, Vincenzo (guidi@fe.infn.it) | 1600年 / International Union of Crystallography, 5 Abbey Road, Chester, CH1 2HU, United Kingdom卷 / 48期

关键词：

Gamma rays - Efficiency - Geometry - Focusing;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The grooving technique was employed for manufacturing a self-standing curved Ge crystal. The crystal focuses hard X-rays with high efficiency by diffraction in Laue geometry through asymmetric bent planes. The sample was tested at the Institut Laue-Langevin (Grenoble, France), undergoing two types of characterization. A monochromatic and low-divergence γ-ray beam was used to test the curvature of asymmetric planes, showing a diffraction performance better than for any mosaic crystal under equal conditions. Then, the focusing capability of the crystal was probed through a polychromatic and fine-focus hard X-ray beam. Asymmetric (220) planes were chosen for analysis because of the impossibility of obtaining a curvature along this family of planes via any symmetric configuration in focusing crystals. A method for calculating the curvatures induced in any family of lattice planes is also presented. © 2015 International Union of Crystallography.

引用

页码：297 / 300

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