Development of a flexible gamma-ray detector using a liquid scintillation light guide (LSLG)

作者：Nomura Kiyoshi^*; Yunoki Akira; Hara Masayuki; Morito Yuko; Fujishima Akira

来源：Applied Radiation and Isotopes, 2018, 139: 12-19.

DOI：10.1016/j.apradiso.2018.04.018

• Flexible detector for gamma ray
• Liquid scintillation light guide (LSLG)
• Long tube liquid scintillation counter
• Position sensitive detector
• Nondestructive survey meter. Dose rate meter

A flexible gamma detector using a liquid scintillation light guide (LSLG) was developed. The analyzed pulse height (PHA) spectrum depended on the diameter, length and scintillator concentration of the LSLG, and the distance of a gamma ray irradiation point from the head of photomultiplier tube (PMT). From the analysis of PHA spectrum, it was found that the count ratio of two divided channel regions linearly decreases as the distance from the PMT head increases. It was further found that the radiation dose rate can be estimated by setting the flexible LSLG tube to a circular shape since the count rate is proportional to the dose rate measured by a conventional NaI (Tl) scintillation detector. Therefore, a flexible and long LSLG detector using a single PMT is useful for determination of the dose rate and has a potential to detect local contaminations in a certain narrow space.

• 出版日期2018-9