JOPSS - Search Results

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：0 Percentile：0.01(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.

JAEA Reports

JAEA-Tokai tandem annual report 2013; April 1, 2013 - March 31, 2014

Department of Research Reactor and Tandem Accelerator

JAEA-Review 2016-025, 101 Pages, 2016/12

JAEA-Review-2016-025.pdf:7.86MB

The JAEA-Tokai tandem accelerator complex has been used in various research fields such as nuclear science and material science by researchers not only of JAEA but also from universities, research institutes and industrial companies. This annual report covers developments of accelerators and research activities carried out using the tandem accelerator and superconducting booster from April 1, 2013 to March 31, 2014. Thirty-one summary reports were categorized into seven research/development fields:(1) accelerator operation and development, (2) nuclear structure, (3) nuclear reaction, (4) nuclear chemistry, (5) nuclear theory, (6) atomic physics and solid state physics (7) radiation effects in materials. This report also lists publications, meetings, personnel, committee members, cooperative researches and common use programs.

JAEA Reports

Materials Science Symposium "Heavy Ion Science in Tandem Energy Region"; January 9-10, 2001, Japan Atomic Energy Research Institute Tokai Research Establishment

Iwamoto, Akira; Yoshida, Tadashi; Takeuchi, Suehiro

JAERI-Conf 2001-014, 174 Pages, 2001/11

JAERI-Conf-2001-014.pdf:11.58MB

no abstracts in English

JAEA Reports

Materials Science Symposoium "Heavy Ion Science in Tandem Energy Region"; January 12-13, 1999, Joyo Geibun Center, Mito

Iwamoto, Akira; Yoshida, Tadashi; Takeuchi, Suehiro

JAERI-Conf 99-013, p.234 - 0, 2000/01

JAERI-Conf-99-013.pdf:14.07MB

no abstracts in English

JAEA Reports

Proceedings of the Symposium on the Joint Research Project between JAERI and Universities; Current status and future perspectives of the chemistry research in the nuclear fuel cycle backend field, January 27, 1999, National Education Center, Tokyo, Japan

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JAERI-Conf 99-010, p.98 - 0, 1999/10

JAERI-Conf-99-010.pdf:6.41MB

no abstracts in English

Journal Articles

Nuclear chemistry

Nakahara, Hiromichi*; Nagame, Yuichiro

Nihon Genshiryoku Gakkai-Shi, 41(4), p.389 - 391, 1999/04

no abstracts in English

JAEA Reports

JAERI TANDEM & V.D.G. annual report 1992; April 1, 1992 - March 31, 1993

JAERI-M 93-174, 174 Pages, 1993/09

JAERI-M-93-174.pdf:4.43MB

no abstracts in English

JAEA Reports

JAERI TANDEM, LINAC & V.D.G. annual report 1991

JAERI-M 92-124, 204 Pages, 1992/09

JAERI-M-92-124.pdf:5.85MB

no abstracts in English

JAEA Reports

JAERI TANDEM, LINAC & V.D.G. annual report 1990; April 1, 1990 - March 31, 1991

JAERI-M 91-170, 185 Pages, 1991/10

JAERI-M-91-170.pdf:4.38MB

no abstracts in English

JAEA Reports

High intensity proton accelerator program

Kaneko, Yoshihiko; Mizumoto, Motoharu; ; Nakahara, Yasuaki; Iwamoto, Akira; Funahashi, Satoru; ; Takeda, Tatsuoki; Hoshi, Michio; Shinohara, Nobuo; et al.

JAERI-M 91-095, 137 Pages, 1991/06

JAERI-M-91-095.pdf:4.2MB

no abstracts in English

JAEA Reports