A novel radiation detector based on Gd2O3 doped organic semiconductor for the detection of γ and β-particles
A novel radiation detector based on Gd2O3 doped organic semiconductor for the detection of γ and β-particles
复制标题
一种基于 Gd2O3 掺杂有机半导体的新型辐射探测器，用于检测 γ 和 β 粒子
DOI：
10.1016/j.nima.2022.166797
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
T. Suzuki
中科院分区：
文献类型：
--
作者：
E. Fukasawa ; H. Miyata ; E. Miyata ; M. Katsumata ; H. Sato ; H. Ono ; M. Watanabe ; E. Saito ; Y. Seino ; A. Umeyama ; M. Sato ; M. Tamura ; T. Suzuki
开发了一种由有机半导体材料衍生的导电聚合物组成的辐射探测器。这项研究背后的动机是降低探测器成本并找到难以制造的大型无机半导体探测器的合适替代品。在此，我们报告了使用有机半导体、聚苯胺、传感器检测 γ 粒子所做出的前所未有的努力。此外，与其他传统传感器相比，新型有机半导体传感器还表现出改进的β粒子检测能力。增加传感器的材料密度，提高检测灵敏度。我们专注于高电子密度材料，并通过在材料中掺杂氧化钆（Gd 2 O 3）来提高γ和β粒子灵敏度。当Gd 2 O 3 掺杂材料用于有机-无机混合辐射探测器时，探测器对60 Co源发射的γ粒子的探测灵敏度得到提高。此外，还尝试通过采用多种方法来制造具有改进的β粒子灵敏度的传感器，包括掺杂Gd 2 O 3 、使用具有微调氧化态的聚苯胺以及修改电极设计。在大学实验室环境下实现了 20% 的目标探测器效率，这是有机辐射传感器商业化所必需的。
A radiation detector that consists of a conducting polymer derived from an organic semiconductor material was developed. The motivation behind this study was to reduce the detector costs and to find a suitable alternative to large inorganic semiconductor detectors, which are difficult to fabricate. Herein, we report an unprecedented effort made to detect γ-particles using organic semiconductor, polyaniline, sensors. In addition, the novel organic semiconductor sensors also exhibited improved detection of β-particles compared with other conventional sensors. The material density of the sensor was increased to enhance the detection sensitivity. We focused on materials with high electron density and improved the γ and β-particle sensitivity by doping the material with gadolinium oxide (Gd 2 O 3). When the Gd 2 O 3 doped material was used in a hybrid organic–inorganic radiation detector, the detection sensitivity of the detector improved for γ-particles ejected from a 60 Co source. Further, an attempt was made to fabricate sensors with improved β-particle sensitivity by adopting several approaches, including doping Gd 2 O 3, using polyaniline with fine-tuned oxidation states, and modifying electrode designs. The target detector efficiency of 20% was achieved in the environment of a university laboratory, which is necessary to commercialize the organic radiation sensor.