Method for determining 224Ra in sediment by using pulse ionization chamber emanometer

US12332388B2 · kind B2 · utility

Assignees

• FIRST INSTITUTE OF OCEANOGRAPHY, MINISTRY OF NATURAL RESOURCES · CN
• OCEAN UNIVERSITY OF CHINA · CN
• Shandong Marine Resource and Environment Research Institute · CN

Inventors

• Guangquan Chen · Lo Wu, CN
• Wen-Feng Liu · Naperville, US
• Shibin Zhao · Qingdao, CN
• Chunqian Li · Qingdao, CN
• Jinjia Guo · Qingdao, CN
• Yancheng Wang · Hangzhou City, CN
• Bochao Xu · Lo Wu, CN
• Xiaofei Yin · Changzhou City, CN
• Shan Sun · Yantai, CN

Key dates

• Filing date: Jul 20, 2022
• Grant date: Jun 17, 2025
• Expiry date: Aug 8, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N33/0093
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Disclosed is a method for determining 224Ra in a sediment by using a pulse ionization chamber emanometer, which belongs to the technical field of analysis and measurement. A pulse ionization chamber emanometer (PIC), a new emanometer, is used. Based on the half-life characteristics of different radon isotopes, one can separate the 220Rn activity from the total counts by dual counting. The resulting 220Rn measurement then can be used to determine the 224Ra activity in sediment according to the principle of secular radioactive equilibrium.