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Iwata, Yoshihiro; Miyabe, Masabumi; Akaoka, Katsuaki; Wakaida, Ikuo
Journal of Quantitative Spectroscopy & Radiative Transfer, 275, p.107882_1 - 107882_9, 2021/11
Times Cited Count：4 Percentile：38.03(Optics)Following the accident at TEPCO's Fukushima Daiichi Nuclear Power Station, an isotope-selective analysis method using laser resonance ionization has been developed for strontium-90. In this study, the isotope shifts and hyperfine structure constants of stable isotopes were measured for two schemes expected to have high isotopic selectivity, and the isotope shifts of strontium-90 were evaluated using the King plot analysis. The measured strontium-90 optical isotopic selectivities ranged from 
to 
, which are sufficient for analysis of real samples.
Iwata, Yoshihiro; Miyabe, Masabumi; Hasegawa, Shuichi*
Journal of Quantitative Spectroscopy & Radiative Transfer, 265, p.107549_1 - 107549_7, 2021/05
Times Cited Count：1 Percentile：12.84(Optics)Following the accident at TEPCO's Fukushima Daiichi Nuclear Power Station, an isotope-selective analysis method using laser resonance ionization has been developed for strontium-90. In this study, we focused on ionization via autoionization states in terms of high isotopic selectivity and ionization efficiency, and the DC Stark shifts caused by the external electric field were measured for these states. It was found that the external electric field in the ionization region has to be of the order of 0.1 V/cm or less to suppress its effect on the observed spectra.
Sherrill, M. E.*; Abdallah, J. Jr.*; Csanak, G.*; Kilcrease, D. P.*; Dodd, E. S.*; Fukuda, Yuji; Akahane, Yutaka; Aoyama, Makoto; Inoue, Norihiro*; Ueda, Hideki; et al.
Journal of Quantitative Spectroscopy & Radiative Transfer, 99(1-3), p.584 - 594, 2006/05
Times Cited Count：3 Percentile：18.42(Optics)In this work, we present a model that solves self-consistently the electron and atomic kinetics to characterize highly non-equilibrium plasmas, in particular for those systems where both the electron distribution function is far from Maxwellian and the evolution of the ion level populations are dominated by time dependent atomic kinetics. In this model, level populations are obtained from a detailed collisional-radiative model where collision rates are computed from a time varying electron distribution function obtained from the solution of the zero-dimensional Boltzmann equation. The Boltzmann collision term includes the effects of electron-electron collisions, electron collisional ionization, excitation and de-excitation. An application for He
spectra from a short pulse laser irradiated argon cluster target will be shown to illustrate the results of our model.
Sasaki, Akira; Utsumi, Takayuki*; Moribayashi, Kengo; Kado, Masataka; Tanaka, Momoko; Hasegawa, Noboru; Kawachi, Tetsuya; Daido, Hiroyuki
Journal of Quantitative Spectroscopy & Radiative Transfer, 71(2-6), p.665 - 674, 2001/10
Times Cited Count：9 Percentile：46.28(Optics)no abstracts in English
Auguste, T.*; Faenov, A. Y.*; Fukumoto, Ichiro; Hulin, S.*; Magunov, A. I.*; Monot, P.*; D'Oliveira, P.*; Pikuz, T. A.*; Sasaki, Akira; Sharkov, B. Y.*; et al.
Journal of Quantitative Spectroscopy & Radiative Transfer, 71(2-6), p.147 - 156, 2001/10
Times Cited Count：14 Percentile：57.94(Optics)no abstracts in English
Sasaki, Akira
Journal of Quantitative Spectroscopy & Radiative Transfer, 58(4-6), p.879 - 885, 1997/00
Times Cited Count：1 Percentile：10.37(Optics)no abstracts in English
