Online ISSN: 1884-4111 Print ISSN: 0033-8303
Radioisotopes 67(5): 221-224 (2018)

技術報告Technical Report

印刷光学フィルタを用いたTDCR液体シンチレーション計数による147Pmの放射能絶対測定Standardization of 147Pm by TDCR Liquid Scintillation Counting using Printed Optical Filters

産業技術総合研究所National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology ◇ 305–8568 茨城県つくば市梅園1–1–1中央第2 ◇ 1–1–1 Umezono, Tsukuba, Ibaraki Pref. 305–8568, Japan

受付日:2017年9月27日Received: September 27, 2017
受理日:2017年12月29日Accepted: December 29, 2017
発行日:2018年5月15日Published: May 15, 2018


The Optical filter method is one of methods to vary the counting efficiency for TDCR (Triple to Double Coincidence) measurement. A method for the fabrication of optical filters for 147Pm standardization was developed using printed plastic film. Toner was printed on a piece of plastic film using the laser printer. The toner color was graduated in steps by a draw software. The counting efficiency was varied according to the amount of scintillation light absorption. The specific activity of 147PmCl3 solution was successfully measured using the printed optical filters.

Key words: TDCR (Triple to Double Coincidence); optical filter; prometium-147; printing technique; liquid scintillation counting

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