Grant-in-Aid for Scientific Research (A).
|Research Institution||Nagoya University|
IGUCHI Tetsuo Nagoya University, Graduate School of Engineering, Professor, 工学研究科, 教授 (60134483)
KAWARABAYASHI Jyun Nagoya University, Graduate School of Engineering, Research Assistant, 工学研究科, 助手 (80283414)
HASEGAWA Syu-ichi The University of Tokyo, Graduate School of Engineering, Lecturer, 工学系研究科, 講師 (90262047)
TAKAHASHI Hiroyuki The University of Tokyo, Graduate School of Engineering, Associate Professor, 工学系研究科, 助教授 (70216753)
ENOKIDA Yoh-ichi Nagoya University, Graduate School of Engineering, Associate Professor, 工学研究科, 助教授 (40168795)
URITANI Akira Nagoya University, Graduate School of Engineering, Associate Professor, 工学研究科, 助教授 (10213521)
|Project Fiscal Year
1997 – 1999
Completed(Fiscal Year 1999)
|Budget Amount *help
¥23,600,000 (Direct Cost : ¥23,600,000)
Fiscal Year 1999 : ¥2,500,000 (Direct Cost : ¥2,500,000)
Fiscal Year 1998 : ¥9,200,000 (Direct Cost : ¥9,200,000)
Fiscal Year 1997 : ¥11,900,000 (Direct Cost : ¥11,900,000)
|Keywords||Resonance Ionization / Laser Ablation / Isotope Analysis / Tunable Diode Laser / Nuclear Reaction Product / Neutron Dosimetry / 共鳴イオン化 / レーザーアブレーション / 同位体分析 / 波長可変半導体レーザー / 核変換生成物 / 中性子線量評価|
The present study is aiming at the development of innovative technique to measure the concentration and/or isotopic ratio of trace elements produced by nuclear reactions with neutrons and new application to nuclear engineering by using Resonant Ionization Spectroscopy (RIS), which has fundamental features of ultra high sensitivity and good elemental selectivity. In particular, we propose to make good use of 'Resonant Laser Abration (RLA)', which combines laser ablation and RIS simultaneously with a single laser. For this purpose, our research subjects are roughly classified into two categories ; one is to understand the basic process of RLA phenomena experimentally and to establish a theoretical model for RLA, and the other is to develop an RLA analytical system with a tunable diode laser, which would be suitable for engineering application, in particular for neutron dosimetry.
The main results are summarized as follows ;
(1) The basic experimental data base has been systematically obt
ained for RLA phenomena on several elements of nuclear nuaterials.
(2) The theoretical model for RLA has been successfully developed to reproduce the experimental resuls quantitatively. Based on this theoretical calculation, the methodology was established to search an optimal condition on laser power for detection of an element of interest.
(3) Through basic experiments to detect ^<27>Al (n, 2n) ^<26>Al reaction in an Al sample which was heavily irradiated by 14MeV neutrons, the applicability of RLA has been demonstrated as new neutron dosimetry technique.
(4) Some useful findings have been obtained to make basic design of an RLA analytical system with a tunable diode laser and a quadrupole mass spectrometer suitable for engineering application, and athe technical problems to be solved have been also made clear.