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Miyabe, Masabumi; Oba, Masaki; Akaoka, Katsuaki; Wakaida, Ikuo; Hasegawa, Shuichi*
no journal, ,
In the field of atomic energy, it is necessary to know isotopic abundances of various radioactive isotopes as well as nuclear fuel materials such as uranium and plutonium. To date radiochemical analysis and mass spectrometry such as ICP-MS are widely used as methods for obtaining these values, and established as a standard method. However, when it is necessary to know the abundance of extremely small amount of radioactive isotope existing in nature, when it is necessary to shorten the time for the pretreatment of samples and measurement, or when it is necessary to perform analysis under extremely high radiation fields or analysis of samples with high radioactivity for the decommissioning of FDNPP, there are cases where it is not applicable with standard analytical techniques alone. Spectroscopic analysis using continuous-wave diode lasers has excellent selectivity and sensitivity to isotopes and atomic states, possibility to simplify sample pretreatment, and the possibility of remote or noncontact analysis, and we are studying to use it as a method to complement standard analytical methods. In this talk, we will report the present status of the development of laser ablation absorption spectroscopy for remote analysis of samples with high radioactivity and that of 3-step resonance ionization mass spectrometry for detecting 
Sr with food regulation level in marine foods, and also discuss about their future prospects.
Wakaida, Ikuo; Akaoka, Katsuaki; Oba, Masaki; Miyabe, Masabumi; Oba, Hironori; Ikeda, Yuji*; Sakka, Tetsuo*; Taira, Takunori*
no journal, ,
no abstracts in English
Shobu, Takahisa; Shiro, Ayumi*; Yasuda, Ryo*; Koizumi, Yasuyuki; Mizutani, Haruki; Kobayashi, Takanori; Muramatsu, Toshiharu
no journal, ,
no abstracts in English
Nishimura, Akihiko; Yamada, Tomonori; Furusawa, Akinori; Takenaka, Yusuke*
no journal, ,
no abstracts in English
Kurosaki, Yuzuru*; Yokoyama, Keiichi
no journal, ,
Electric field of laser pulses is designed by the optimal control theory. The target process is isotope-selective rovibrational excitation of two isotopologues of the lithium chloride molecule, Li
Cl or Li
Cl. The calculation includes both radial and angular motion of atoms in molecule. As a result, it is found that a laser pulse field which can cause isotope-selective rovibrational excitation with high yield exists.