[期刊论文]


Magnetron sputtering system for depositing boron carbide film use as neutron detection

作   者:
Jingtao Zhu;Yang Liu;Hangyu Zhu;Jianrong Zhou;Xiaojuan Zhou;Jie Zhu;Lin Zhu;Zhijia Sun;Yuanbo Chen;Mingqi Cui;Yunping Zhu;Changli Jin;

出版年:2023

页    码:暂无
出版社:S. Karger AG


摘   要:

Boron carbide (B4C) films used as neutron conversion layers were investigated in this paper to replace the traditional 3He detectors due to their shortage. A magnetron sputtering system was developed for depositing large-size B4C films with the 1500 × 400 mm2 uniform-area. B4C films at the micron scale were deposited on aluminum (Al), float glass (SiO2), and silicon (Si) substrates with an inserting adhesion layer. The key characteristics, including surface morphology, thickness nonuniformity, purity, and neutron efficiency of B4C films, were characterized using atomic force microscopy, scanning electron microscopy, grazing incidence x-ray reflectivity, x-ray photoelectron spectroscopy, and neutron radiation metrology. The experimental results indicate that the deposition thickness nonuniformity across a 1500 × 400 mm2 area was better than ±3%. The stoichiometric ratio of boron atoms and carbon atoms (B/C) is 5.18, with 6 at. % O and 0.79 at. % N concentrations. The measured neutron detection efficiency of a 3 µm 10B4C film for 25 meV neutrons was 3.3 ± 0.3(sys)%, which is close to the simulated results (3.4%). The results show that the B4C neutron conversion layer is a promising substitute for 3He for neutron detection in the future.



关键字:

暂无


所属期刊
Acta Anatomica
ISSN: 0001-5180
来自:S. Karger AG