Applications of Parallel-Plate Avalance Counters in Mössbauer Spectroscopy
Applications of Parallel-Plate Avalance Counters in Mössbauer Spectroscopy
复制标题
平行板可用计数器在穆斯堡尔谱中的应用
DOI：
10.1007/978-1-4684-8073-3_16
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发表时间：
1976
影响因子：
3.2
通讯作者：
G. Weyer
中科院分区：
文献类型：
--
作者：
G. Weyer
透射技术是穆斯堡尔光谱学中主要的检测技术。如图1所示，通常的设置包括一个发射穆斯堡尔γ辐射的（移动）源，该源在谐振吸收器中部分吸收；透射辐射在合适的γ-探测器中作为源和吸收体之间相对速度的函数进行检测。典型的透射光谱显示出几个百分点的共振吸收效应。一般来说，由于德拜-沃勒因素，如果在许多情况下可以获得效应-背景比，则该百分比不能增加。然而，在传统的实验安排中，由于检测散射辐射的相对较小的立体角，这种优势受到强度损失的限制。
Transmission techniques are the dominating detection techniques in Mossbauer spectroscopy. As illustrated in Fig.1 the usual set-up consists of a (moving) source emitting Mossbauer γ-radiation which is partially absorbed in a resonance absorber; the transmitted radiation is detected in a suitable γ-detector as a function of a relative velocity between source and absorber. A typical transmission-spectrum shows a resonance absorption effect of a few percent. In general this percentage cannot be increased due to Debye-Waller factors f 1) effect-to-background ratios are obtainable for many cases. This advantage, however, is restricted by a loss in intensity due to a comparably small solid angle for the detection of the scattered radiation in conventional experimental arrangements.