蓝宝石背散射单色器的硬 X 射线毫电子伏特单色化。
Milli-electronvolt monochromatization of hard X-rays with a sapphire backscattering monochromator.
机构信息
European Synchrotron Radiation Facility, Grenoble, France.
出版信息
J Synchrotron Radiat. 2011 Sep;18(Pt 5):802-10. doi: 10.1107/S090904951102485X. Epub 2011 Jul 20.
A sapphire backscattering monochromator with 1.1 (1) meV bandwidth for hard X-rays (20-40 keV) is reported. The optical quality of several sapphire crystals has been studied and the best crystal was chosen to work as the monochromator. The small energy bandwidth has been obtained by decreasing the crystal volume impinged upon by the beam and by choosing the crystal part with the best quality. The monochromator was tested at the energies of the nuclear resonances of (121)Sb at 37.13 keV, (125)Te at 35.49 keV, (119)Sn at 23.88 keV, (149)Sm at 22.50 keV and (151)Eu at 21.54 keV. For each energy, specific reflections with sapphire temperatures in the 150-300 K region were chosen. Applications to nuclear inelastic scattering with these isotopes are demonstrated.
报道了一种用于硬 X 射线（20-40keV）的蓝宝石背散射单色器，带宽为 1.1（1）MeV。研究了几种蓝宝石晶体的光学质量，并选择了最佳晶体用作单色器。通过减小晶体受光束照射的体积并选择质量最佳的晶体部分，获得了较小的能量带宽。在（121）Sb 的核共振能量 37.13keV、（125）Te 的 35.49keV、（119）Sn 的 23.88keV、（149）Sm 的 22.50keV 和（151）Eu 的 21.54keV 处测试了该单色器。对于每种能量，选择了蓝宝石温度在 150-300K 范围内的特定反射。展示了这些同位素的核非弹性散射的应用。
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