Optimization of an isothermal gas-chromatographic setup for the chemical exploration of dubnium (Db, Z = 105) oxychlorides

  • Nadine M. ChieraEmail author
  • Tetsuya K. Sato
  • Tomohiro Tomitsuka
  • Masato Asai
  • Yuta Ito
  • Kaori Shirai
  • Hayato Suzuki
  • Katsuyuki Tokoi
  • Atsushi Toyoshima
  • Kazuaki Tsukada
  • Yuichiro Nagame


An isothermal gas-chromatographic (IGC) device has been developed and tested for on-line gas phase studies of volatile oxychlorides of short-lived group-5 transition metals. Radioisotopes of niobium and tantalum, produced in nuclear fusion evaporation reactions, are directly flushed into the IGC setup by an inert gas-jet. Oxychloride compounds are formed by the addition of SOCl2 and O2. Parameters influencing the formation and transport of NbOCl3 and TaOCl3 are discussed. For nuclides with half-lives (t1/2) of about 30 s, an overall efficiency of 7% is obtained, rendering the IGC setup suitable for the chemical exploration of 262Db (t1/2 = 34 s).


Isothermal gas-chromatography Oxychlorides Niobium Tantalum Dubnium 



The authors express their gratitude to the crew of the JAEA Tandem accelerator for their assistance in the course of these experiments. The present work was partly supported by JSPS Kakenhi Grant-in-Aid for Young Scientists (B) (Grant No. 20740152).


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  • Nadine M. Chiera
    • 1
    • 4
    Email author
  • Tetsuya K. Sato
    • 1
  • Tomohiro Tomitsuka
    • 1
    • 2
  • Masato Asai
    • 1
  • Yuta Ito
    • 1
  • Kaori Shirai
    • 2
  • Hayato Suzuki
    • 1
    • 3
  • Katsuyuki Tokoi
    • 1
    • 3
  • Atsushi Toyoshima
    • 1
  • Kazuaki Tsukada
    • 1
  • Yuichiro Nagame
    • 1
    • 3
  1. 1.Advanced Science Research CenterJapan Atomic Energy AgencyTokaiJapan
  2. 2.Graduate School of Science and TechnologyNiigata UniversityNiigataJapan
  3. 3.Graduate School of Science and EngineeringIbaraki UniversityMitoJapan
  4. 4.Laboratory of RadiochemistryPaul Scherrer InstituteVilligen PSISwitzerland

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