A 4π Multi-wire Proportional Chamber for the 4πβ-γ Coincidence Measurement

• Published in: Tong wei su Vol. 36; no. 2; pp. 212 - 218
• Main Author: YANG Jie;ZHANG Jinsong;CHU Suyun;WANG Xu;GUO Xiangbo;LUO Ning;LUO Laoyong;WANG Wei;QI Mingsen
• Format: Journal Article
• Language: Chinese
• Published: Editorial Board of Journal of Isotopes 01.02.2023
• Subjects: 4π multi-wire proportional chamber; 4πβ-γ coincidence measurement; plateau curve
• ISSN: 1000-7512
• DOI: 10.7538/tws.2022.youxian.054

The β detector of 4πβ-γ coincidence measurement is usually a proportional counter with a single wire of which the electric field distribution is divergent and the detection area is limited, so it can only measure the activity of the point source. A 4π multi-wire proportional chamber used as the β detector of 4πβ-γ coincidence measurement has been designed and fabricated because of the uniform electric field distribution and large detection area. The β plateau curves and the background have been tested. The results show that the plateau length of the β plateau curve is about 270 V, and the plateau slope of the upper and lower anode wires are 8.3‰ and 9.6‰ (60Co), 8.3‰ and 8.9‰ (90Sr-90Y), respectively. The background counting rate is within 10 s-1. The 4π multiwire proportional chamber can be used as the β detector of 4πβ-γ coincidence measurement for further research.