Experimental fission studies for reaction physics or nuclear spectroscopy can profit from fast, efficient, and radiation-resistant fission fragment (FF) detectors. When such experiments are performed in-beam in intense thermal neutron beams, additional constraints arise in terms of target-detector interface, beam-induced background, etc. Therefore, wide gap semi-conductor detectors were tested with the aim of developing innovative instrumentation for such applications. The detector characterization was performed with mass- and energy-separated fission fragment beams at the ILL (Institut Laue Langevin) LOHENGRIN spectrometer. Two single crystal diamonds, three polycrystalline and one diamond-on-iridium as well as a silicon carbide detector were characterized as solid state ionization chamber for FF detection. Timing measurements were performed with a 500-µm thick single crystal diamond detector read out by a broadband amplifier. A timing resolution of ∼10.2 ps RMS was obtained for FF with mass A = 98 at 90 MeV kinetic energy. Using a spectroscopic preamplifier developed at INFN-Milano, the energy resolution measured for the same FF was found to be slightly better for a ∼50-µm thin single crystal diamond detector (∼1.4% RMS) than for the 500-µm thick one (∼1.6% RMS), while a value of 3.4% RMS was obtained with the 400-µm silicon carbide detector. The Pulse Height Defect (PHD), which is significant in silicon detectors, was also investigated with the two single crystal diamond detectors. The comparison with results from α and triton measurements enabled us to conclude that PHD leads to ∼50% loss of the initial generated charge carriers for FF. In view of these results, a possible detector configuration and integration for in-beam experiments has been discussed.

反应物理或核能谱的实验裂变研究可以从快速、高效和抗辐射的裂变碎片 (FF) 探测器中受益。当在强热中子束中进行此类实验时，在目标探测器界面、光束感应背景等方面会出现额外的限制。因此，测试了宽隙半导体探测器，目的是开发创新的仪器此类应用。探测器表征是在 ILL (Institut Laue Langevin) LOHENGRIN 光谱仪上用质量和能量分离的裂变碎片束进行的。两个单晶金刚石、三个多晶金刚石和一个铱上金刚石以及一个碳化硅检测器被表征为用于 FF 检测的固态电离室。定时测量是使用由宽带放大器读出的 500 µm 厚单晶金刚石探测器进行的。在 90 MeV 动能下，质量 A = 98 的 FF 获得了约 10.2 ps RMS 的时间分辨率。使用在 INFN-Milano 开发的光谱前置放大器，发现对于相同的 FF 测量的能量分辨率对于 50 微米薄的单晶金刚石探测器（约 1.4% RMS）略好于 500 微米厚的检测器（约 1.6% RMS），而使用 400 µm 碳化硅探测器获得的 RMS 值为 3.4%。脉冲高度缺陷 (PHD) 在硅探测器中很重要，也用两个单晶金刚石探测器进行了研究。与 α 和氚测量结果的比较使我们能够得出结论，PHD 导致 FF 初始生成的电荷载流子损失约 50%。