Spectroscopic study of neptunium complexation in hydrate melts

Research Project

Project/Area Number	20760594
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Nuclear engineering
Research Institution	Kyoto University
Principal Investigator	FUJII Toshiyuki Kyoto University, 原子炉実験所, 准教授 (10314296)
Project Period (FY)	2008 – 2010
Project Status	Completed (Fiscal Year 2010)
Budget Amount *help	¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000) Fiscal Year 2010: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000) Fiscal Year 2009: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000) Fiscal Year 2008: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords	燃料サイクル / ネプツニウム / 水和物溶融体 / 硝酸カルシウム / ラマン分光分析法 / 分子振動 / ウラン / オキソイオン / アクチニルイオン / 濃厚電解質溶液 / 蛍光分光分析 / ラマン分光分析 / 硝酸イオン / 吸光分光分析 / テルビウム / ユーロピウム / 溶存状態
Research Abstract	Neptunium species in calcium nitrate hydrate melts were analyzed by Raman spectrometry and UV/Vis/NIR spectrometry. Major fraction was assigned to be NpO_2^<2+> of Np(VI) and small fraction to be NpO_2^+ of Np(V). A shift of the v1 symmetric vibrational frequency of NpO_2^<2+> in nitrate media was found in Raman spectra. This suggests a coordination circumstance change of NpO_2^<2+>.

Report

(4 results)