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Miyabe, Masabumi; Oba, Masaki; Kato, Masaaki; Wakaida, Ikuo; Watanabe, Kazuo
JAERI-Research 2004-023, 17 Pages, 2004/11
High precision resonance ionization spectroscopy has been applied to determination of an accurate ionization potential of Ca. Three-step resonant excitation with single-mode extended cavity diode lasers populates a series of (P) and (F) Rydberg states in the rage of =20-150. By using an extended Ritz formula for quantum defect, the series convergence limit has been determined to be 49305.9240 (20) cm with the accuracy improved one order of magnitude higher than previously reported ones.
Miyabe, Masabumi; Oba, Masaki; Wakaida, Ikuo
Journal of the Physical Society of Japan, 70(5), p.1315 - 1320, 2001/05
Times Cited Count:8 Percentile:48.53(Physics, Multidisciplinary)no abstracts in English
Kudo, Hiroshi
Kagaku, 46(5), 353 Pages, 1991/00
no abstracts in English
Kudo, Hiroshi
Chemistry Letters, 1989, p.1611 - 1614, 1989/00
no abstracts in English
Miyabe, Masabumi; Iwata, Yoshihiro; Tomita, Hideki*; Morita, Masato*; Sakamoto, Tetsuo*
no journal, ,
The isotopic composition of Nd is used in a wide range of nuclear field, such as forensic analysis and fuel burnup evaluation, and the currently most used analytical methods include TIMS and ICP-MS. However, the analytical samples obtained in decommissioning of Fukushima's failed reactors contain a mixture of particles of different sources, and these analytical techniques which cannot distinguish individual particles lose the information on their origin and history. Conversely, if the origin can be determined from the burnup of each particle, it is important for clarifying accident progress and criticality safety assessment. For this reason, we have applied ion sputter mass spectrometry imaging, which can measure the distribution of nuclides in individual particles, and have developed laser resonance secondary neutral mass spectrometry as a countermeasure against the isobaric interference. In this study, we performed two-step ionization spectroscopy to obtain highly efficient ionization schemes of Nd. As a result, we found several schemes with higher ionization efficiency than previously reported one.