Gallium Arsenide detectors for X-ray and electron (beta particle) spectroscopy
Gallium Arsenide detectors for X-ray and electron (beta particle) spectroscopy
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用于 X 射线和电子（β 粒子）光谱的砷化镓探测器
DOI：
10.1016/j.nima.2016.08.047
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Lioliou G
中科院分区：
文献类型：
--
作者：
Lioliou G
给出了具有10 μm i层的GaAs p+-i-n+梅萨光电二极管在X射线和β粒子照射下的光谱响应特性的结果。在室温下对直径为200 µm和400 µm的共22个器件进行了电气特性分析。所有器件均显示出相当的特性，在50 kV/cm的内部电场下测得的漏电流范围为4 nA/cm 2至67 nA/cm 2。发现它们的非故意掺杂i层由于其低掺杂密度而在0 V下几乎完全耗尽。使用一个200 µm直径的设备和一个400 µm直径的设备获得55 Fe X射线光谱。使用200 µm和400 µm直径的器件分别实现的最佳能量分辨率（5.9 keV时的FWHM）为625 eV和740 eV。噪声分析表明，系统能量分辨率的限制因素是介电噪声;如果通过更好地设计读出电子设备的前端来消除这种噪声，则可实现的分辨率将为250 eV。使用200 µm直径的设备获得的63 Ni β粒子谱显示了这些探测器用于电子和β粒子探测的潜在实用性。半导体电子光谱仪的开发对空间等离子体物理学特别重要;这类设备可能会在未来的空间飞行任务中得到使用，以研究木星和木卫二的等离子体环境，以及哈勃空间望远镜最近的紫外线观测结果所假设的木卫二水蒸气羽流的预测电子碰撞激发。
Results characterizing GaAs p+-i-n+mesa photodiodes with a 10 µm i layer for their spectral response under illumination of X-rays and beta particles are presented. A total of 22 devices, having diameters of 200 µm and 400 µm, were electrically characterized at room temperature. All devices showed comparable characteristics with a measured leakage current ranging from 4 nA/cm2to 67 nA/cm2at an internal electric field of 50 kV/cm. Their unintentionally doped i layers were found to be almost fully depleted at 0 V due to their low doping density.55Fe X-ray spectra were obtained using one 200 µm diameter device and one 400 µm diameter device. The best energy resolution (FWHMat 5.9 keV) achieved was 625 eV using the 200 µm and 740 eV using the 400 µm diameter device, respectively. Noise analysis showed that the limiting factor for the energy resolution of the system was the dielectric noise; if this noise was eliminated by better design of the front end of the readout electronics, the achievable resolution would be 250 eV.63Ni beta particle spectra obtained using the 200 µm diameter device showed the potential utility of these detectors for electron and beta particle detection. The development of semiconductor electron spectrometers is important particularly for space plasma physics; such devices may find use in future space missions to study the plasma environment of Jupiter and Europa and the predicted electron impact excitation of water vapor plumes from Europa hypothesized as a result of recent Hubble Space Telescope (HST) UV observations.
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55Fe 的半衰期和 X 射线发射概率。
DOI：
10.1016/s0969-8043(00)00166-4
发表时间：
2000
期刊：
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine
影响因子：
--
作者：
U. Schötzig
通讯作者：
U. Schötzig
X射线检测用砷化镓台面二极管的制作研究
影响因子：
1.3
作者：
Ng J
通讯作者：
Ng J
一种获得无噪声β谱的方法
影响因子：
1.6
作者：
C. Celiktas
通讯作者：
C. Celiktas
DOI：
10.1016/j.nima.2011.06.101
发表时间：
2011-10-21
影响因子：
1.4
作者：
Barnett, A. M.;Lees, J. E.;Gomes, R. B.
通讯作者：
Gomes, R. B.
DOI：
10.1016/s0168-9002(96)00474-3
发表时间：
1996-10-01
影响因子：
1.4
作者：
Bertuccio, G;Pullia, A;DeGeronimo, G
通讯作者：
DeGeronimo, G