Silicon detectors with boron converters of different geometrical modifications for fast neutrons registration

International Conference on Particle Physics and Astrophysics

Ryabeva, E.V.^1 ; Kadilin, V.V.^1 ; Dedenko, G.L.^1 ; Zin, Tant^1,2

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoe highway 31, Moscow

115409, Russia^1

Defence Service Science and Technology Research Center (DSSTRC), Pyin Oo Lwin, Myanmar^2

关键词: Alternating layers;    Detection efficiency;    Detector efficiency;    Geometrical modification;    Geometry optimization;    Neutron converters;    Optimal geometry;    Sensing material;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/675/4/042005/pdf
DOI  :  10.1088/1742-6596/675/4/042005

来源: IOP

【 摘 要 】

In this article the development of the model for fast neuron detector is considered. The construction of detector is based on alternating layers of silicon as sensing material of charged particles and boron (enriched with10B) as neutron converter located in moderator Simulation in GEANT4 showed that detector with one layer of silicon and one layer of boron has very low detection efficiency for fast neutron (approximately 4%).. The study of the possibility to increase detector efficiency due to geometry optimization of it is presented It is shown that efficiency depends on the number of layers and their location in the materials of detectors and moderator. It was found that the optimal geometry is that where the layers of boron-silicon are angularly related to each other. It is shown that the detection efficiency for a model with set of boron-silicon layers angularly related to each other is up may reach 6%.