An advanced SiC nuclear radiation detector
An advanced SiC nuclear radiation detector
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先进的碳化硅核辐射探测器
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
F. Ruddy
中科院分区：
文献类型：
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作者：
S. Seshadri;A. Dulloo;F. Ruddy
本文报道了在n+4 H-SiC衬底上制作的低噪声、高电荷收集效率、高分辨率、室温、自偏置、3-8 μ m厚、外延生长的SiC肖特基和pn结二极管探测器。这些设备也首次显示出具有线性伽马射线响应。所使用的薄有源区不仅消除了材料纯度的问题，而且还允许针对特定应用定制器件。例如，用于反应堆控制应用的探测器的伽马射线灵敏度可以被最小化，因为伽马射线信号（在体探测器的整个体积上产生的）受到薄有源区的限制，而中子感生的带电粒子信号（在表面附近产生的）不受限制。最后，这些设备的高分辨率（相当于硅探测器），使中子，伽马射线和裂变碎片光谱之间的歧视，并应证明在其他核辐射探测应用程序的有用。
This paper reports low noise, high charge collection efficiency, resolution, room temperature, self-biased operation of 3-8 /spl mu/m thick, epitaxially grown, SiC Schottky and pn junction diode detectors fabricated on n+ 4H-SiC substrates. These devices are also shown, for the first time, to have a linear gamma ray response. The thin active region used not only eliminates the problems with material purity, but also allows the device to be tailored for specific applications. For instance, the gamma ray sensitivity of detectors for reactor control applications, can be minimized because the gamma ray signal (produced over the entire volume of a bulk detector) is limited by the thin active region whereas the neutron-induced charged-particle signal (produced near the surface) is not. Finally, the high resolution of these devices (comparable to silicon detectors) enables discrimination between neutron, gamma ray and fission fragment spectra and should prove useful in other nuclear radiation detection applications.