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Title: Experiments on Synthesis of the Heaviest Element at RIKEN

Abstract

At the Institute of Physical and Chemical Research (RIKEN) a series of experiments studying the productions and their decays of the heaviest elements have been performed by using a gas-filled recoil ion separator GARIS. Results on the isotope of the 112th element, 277112, and on that of the 113th element, 278113, are reviewed. Tow decay chains which are assigned to be ones originating from the isotope 277112 were observed in the 208Pb(70Zn, n) reaction. Both chains consisted of four consecutive alpha decays followed by a spontaneous fission. The results provide a confirmation of the production and decay of the isotope 277112 reported by a research group at Gesellschaft fuer Schwerionenforschung (GSI), Germany, produced via the same reaction by using a velocity filter. Tow decay chains, both consisted of four consecutive alpha decays followed by a spontaneous fission, were observed also in the reaction 209Bi(70Zn, n). Those are assigned to be the convincing candidate events of the decays of the isotope of the 113th element, 278113, and its daughter nuclei, 274Rg, 270Mt, 266Bh, and 262Db.

Authors:
; ; ; ; ; ; ; ; ; ;  [1];  [1];  [2];  [3];  [4];  [5];  [6]; ;  [7];  [8] more »;  [2];  [9] « less
  1. Nishina Center for Accelerator Based Science, RIKEN, Wako, Saitama 315-0198 (Japan)
  2. (Japan)
  3. Center for Instrumental Analysis, Niigata University, Ikarashi, Niigata 950-2181 (Japan)
  4. Center for Nuclear Study, University of Tokyo Wako Branch, Wako, Saitama 351-0198 (Japan)
  5. Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan)
  6. Department of Chemistry, Niigata University, Ikarashi, Niigata 950-2181 (Japan)
  7. University of Tsukuba, Tsukuba, Ibaraki 305-8571 (Japan)
  8. Department of Physics, Tohoku University, Aoba-ku, Sendai 980-8578 Japan (Japan)
  9. Department of Physics, Yamagata University, Shirakawa, Yamagata 990-8560 (Japan) (and others)
Publication Date:
OSTI Identifier:
21056767
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 891; Journal Issue: 1; Conference: 6. Symposium on nuclear physics, Tours (France), 5-8 Sep 2006; Other Information: DOI: 10.1063/1.2713494; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ALPHA DECAY; BISMUTH 209 TARGET; BOHRIUM 266; DUBNIUM 262; ELEMENT 113 278; HEAVY ION FUSION REACTIONS; JAPANESE ORGANIZATIONS; LEAD 208 TARGET; MEITNERIUM 270; NEUTRONS; RECOILS; ROENTGENIUM 274; SPONTANEOUS FISSION; VELOCITY; ZINC 70 REACTIONS

Citation Formats

Morita, K., Morimoto, K., Kaji, D., Haba, H., Kanumgo, R., Katori, K., Kikunaga, H., Ohnishi, T., Suda, T., Yoneda, A., Yoshida, A., Akiyama, T., Department of Physics, Saitama University, Sakura-ku, Saitama 338-8570, Goto, S., Ideguchi, E., Koura, H., Kudo, H., Ozawa, A., Sueki, K., Sato, N., Nishina Center for Accelerator Based Science, RIKEN, Wako, Saitama 315-0198, and Tokanai, F. Experiments on Synthesis of the Heaviest Element at RIKEN. United States: N. p., 2007. Web. doi:10.1063/1.2713494.
Morita, K., Morimoto, K., Kaji, D., Haba, H., Kanumgo, R., Katori, K., Kikunaga, H., Ohnishi, T., Suda, T., Yoneda, A., Yoshida, A., Akiyama, T., Department of Physics, Saitama University, Sakura-ku, Saitama 338-8570, Goto, S., Ideguchi, E., Koura, H., Kudo, H., Ozawa, A., Sueki, K., Sato, N., Nishina Center for Accelerator Based Science, RIKEN, Wako, Saitama 315-0198, & Tokanai, F. Experiments on Synthesis of the Heaviest Element at RIKEN. United States. doi:10.1063/1.2713494.
Morita, K., Morimoto, K., Kaji, D., Haba, H., Kanumgo, R., Katori, K., Kikunaga, H., Ohnishi, T., Suda, T., Yoneda, A., Yoshida, A., Akiyama, T., Department of Physics, Saitama University, Sakura-ku, Saitama 338-8570, Goto, S., Ideguchi, E., Koura, H., Kudo, H., Ozawa, A., Sueki, K., Sato, N., Nishina Center for Accelerator Based Science, RIKEN, Wako, Saitama 315-0198, and Tokanai, F. Mon . "Experiments on Synthesis of the Heaviest Element at RIKEN". United States. doi:10.1063/1.2713494.
@article{osti_21056767,
title = {Experiments on Synthesis of the Heaviest Element at RIKEN},
author = {Morita, K. and Morimoto, K. and Kaji, D. and Haba, H. and Kanumgo, R. and Katori, K. and Kikunaga, H. and Ohnishi, T. and Suda, T. and Yoneda, A. and Yoshida, A. and Akiyama, T. and Department of Physics, Saitama University, Sakura-ku, Saitama 338-8570 and Goto, S. and Ideguchi, E. and Koura, H. and Kudo, H. and Ozawa, A. and Sueki, K. and Sato, N. and Nishina Center for Accelerator Based Science, RIKEN, Wako, Saitama 315-0198 and Tokanai, F.},
abstractNote = {At the Institute of Physical and Chemical Research (RIKEN) a series of experiments studying the productions and their decays of the heaviest elements have been performed by using a gas-filled recoil ion separator GARIS. Results on the isotope of the 112th element, 277112, and on that of the 113th element, 278113, are reviewed. Tow decay chains which are assigned to be ones originating from the isotope 277112 were observed in the 208Pb(70Zn, n) reaction. Both chains consisted of four consecutive alpha decays followed by a spontaneous fission. The results provide a confirmation of the production and decay of the isotope 277112 reported by a research group at Gesellschaft fuer Schwerionenforschung (GSI), Germany, produced via the same reaction by using a velocity filter. Tow decay chains, both consisted of four consecutive alpha decays followed by a spontaneous fission, were observed also in the reaction 209Bi(70Zn, n). Those are assigned to be the convincing candidate events of the decays of the isotope of the 113th element, 278113, and its daughter nuclei, 274Rg, 270Mt, 266Bh, and 262Db.},
doi = {10.1063/1.2713494},
journal = {AIP Conference Proceedings},
number = 1,
volume = 891,
place = {United States},
year = {Mon Feb 26 00:00:00 EST 2007},
month = {Mon Feb 26 00:00:00 EST 2007}
}