JOPSS - Search Results

Journal Articles

Extreme chemistry of superheavy elements

Sato, Tetsuya; Nagame, Yuichiro*

Nihon Butsuri Gakkai-Shi, 78(2), p.64 - 72, 2023/02

https://doi.org/10.11316/butsuri.78.2_64

The study of the chemistry of superheavy elements, which are located in the heavy extremes of the periodic table, has made considerable progress over the past 20 years, and new approaches based on various ideas have recently been developed. Research groups in Japan have also made significant contributions to the development of research on superheavy elements. Recently, notable results have been reported for the transactinide elements rutherfordium (element 104), dubnium (element 105), and seaborgium (element 106), and the heavy actinides with atomic numbers exceeding 100. The review will focus on the recent main results of these elements. This review outlines the main recent results and touches on future prospects.

Journal Articles

Chemistry of the elements at the end of the actinide series using their low-energy ion-beams

Sato, Tetsuya; Nagame, Yuichiro*

Radiochimica Acta, 110(6-9), p.441 - 451, 2022/07

https://doi.org/10.1515/ract-2022-0001

Times Cited Count：1 Percentile：27.23(Chemistry, Inorganic & Nuclear)

We describe our recent achievements in the effective production of low-energy ion-beams of the elements at the end of the actinide series, fermium (Fm, atomic number Z = 100), mendelevium (Md, Z = 101), nobelium (No, Z = 102), and lawrencium (Lr, Z = 103), using a surface ionization ion-source installed in the ISOL (Isotope Separator On-Line) at the Tandem accelerator facility of JAEA (Japan Atomic Energy Agency). Then the successful measurements of the first ionization potentials (IP) of these elements with the ISOL setup are reviewed. The measured IP values increased up to No via Fm and Md, while that of Lr was the lowest among the actinides. Based on the variation of the IP1 values of the heavy actinides with the atomic number in comparison with those of the heavy lanthanides, the results clearly demonstrated that the 5f orbitals are fully filled at No, and the actinide series ends with Lr. Furthermore, the IP value of Lr provoked controversy over its position in the Periodic Table, so a short introduction to this issue is presented. The feasibility of the extension of chemical studies to still heavier elements with their ion-beams generated by ISOL is briefly discussed.

Journal Articles

Actinides and transactinides

Nagame, Yuichiro*; Sato, Tetsuya; Kratz, J. V.*

Kirk-Othmer Encyclopedia of Chemical Technology (Internet), 52 Pages, 2020/09

https://doi.org/10.1002/0471238961.0103200919050102.a01.pub3

This article gives a brief summary of the recent progress in the synthesis of new elements as well as heavy nuclei far from the stability line and in the studies of exotic nuclear decay properties including nuclear fission of heavy nuclei and chemical characterization of heavy actinides and transactinides. Experimental techniques of single-atom detection after in-flight separation with electromagnetic separators have made a breakthrough in discovery of new heavy isotopes. Development of automated rapid chemical separation apparatuses performing one atom-at-a-time chemistry has also considerably contributed to the progress of chemical studies of the transactinides. Some key experiments exploring new frontiers of the production and chemical characterization of heavy actinides and transactinides using state-of-the-art techniques are demonstrated. A short historical perspective of actinide and transactinide elements and some prospects of extending nuclear and chemical studies of heavy elements in the future are briefly presented.

Journal Articles

Production and chemistry of transactinide elements

Nagame, Yuichiro

Journal of Nuclear and Radiochemical Sciences, 6(3), p.205 - 210, 2005/12

no abstracts in English

Journal Articles

Radiochemical studies of the transactinide element, rutherfordium (Rf) at JAERI

Nagame, Yuichiro

Journal of Nuclear and Radiochemical Sciences, 6(2), p.A21 - A28, 2005/12

https://doi.org/10.14494/jnrs2000.6.2_A21

no abstracts in English

Journal Articles

Transactinide element research; Present status and perspectives

Nagame, Yuichiro

Radioisotopes, 54(11), p.555 - 567, 2005/11

https://doi.org/10.3769/radioisotopes.54.555

no abstracts in English

Journal Articles

Chemical studies of the heaviest elements

Nagame, Yuichiro; Haba, Hiromitsu*; Tsukada, Kazuaki; Asai, Masato; Toyoshima, Atsushi; Goto, Shinichi*; Akiyama, Kazuhiko; Kaneko, Tetsuya; Sakama, Minoru*; Hirata, Masaru; et al.

Nuclear Physics A, 734, p.124 - 135, 2004/04

https://doi.org/10.1016/j.nuclphysa.2004.01.021

Times Cited Count：11 Percentile：56.77(Physics, Nuclear)

no abstracts in English

JAEA Reports

Proceedings of the 2nd Workshop on the Nuclear Sciences of the Heaviest Elements; February, 22-23, 2001, JAERI, Tokai, Japan

Tsukada, Kazuaki; Nagame, Yuichiro

JAERI-Conf 2003-007, 108 Pages, 2003/06

JAERI-Conf-2003-007.pdf:7.81MB

no abstracts in English

Journal Articles

Isothermal gas chromatography of chlorides of Zr and Hf as Rf homologs

Kaneko, Tetsuya*; Ono, Sawako*; Goto, Shinichi*; Haba, Hiromitsu; Asai, Masato; Tsukada, Kazuaki; Nagame, Yuichiro; Kudo, Hisaaki*

Journal of Radioanalytical and Nuclear Chemistry, 255(2), p.381 - 384, 2003/02

https://doi.org/10.1023/A:1022577409113

Times Cited Count：0 Percentile：0.01(Chemistry, Analytical)

no abstracts in English

Journal Articles

Transactinide nuclear chemistry at JAERI

Nagame, Yuichiro; Haba, Hiromitsu; Tsukada, Kazuaki; Asai, Masato; Akiyama, Kazuhiko; Hirata, Masaru; Nishinaka, Ichiro; Ichikawa, Shinichi; Nakahara, Hiromichi; Goto, Shinichi*; et al.

Czechoslovak Journal of Physics, 53, p.A299 - A304, 2003/00

https://doi.org/10.1007/s10582-003-0038-3

Times Cited Count：7 Percentile：46.47(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Status and prospects of Heavy element nuclear chemistry research at JAERI

Nagame, Yuichiro; Asai, Masato; Haba, Hiromitsu; Tsukada, Kazuaki; Goto, Shinichi; Sakama, Minoru; Nishinaka, Ichiro; Toyoshima, Atsushi; Akiyama, Kazuhiko; Ichikawa, Shinichi

Journal of Nuclear and Radiochemical Sciences, 3(1), p.129 - 132, 2002/06

https://doi.org/10.14494/jnrs2000.3.129

no abstracts in English

Journal Articles

Startup of transactinide chemistry in JAERI

Haba, Hiromitsu; Tsukada, Kazuaki; Asai, Masato; Nishinaka, Ichiro; Sakama, Minoru*; Goto, Shinichi*; Hirata, Masaru; Ichikawa, Shinichi; Nagame, Yuichiro; Kaneko, Tetsuya*; et al.

Radiochimica Acta, 89(11-12), p.733 - 736, 2002/02

https://doi.org/10.1524/ract.2001.89.11-12.733

Times Cited Count：15 Percentile：71.11(Chemistry, Inorganic & Nuclear)

no abstracts in English

Journal Articles