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J. Phys. Soc. Jpn. 79 (2010) 073201 (5 pages)  |Previous Article| |Next Article|  |Table of Contents|
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Identification of 45 New Neutron-Rich Isotopes Produced by In-Flight Fission of a 238U Beam at 345 MeV/nucleon

Tetsuya Ohnishi, Toshiyuki Kubo, Kensuke Kusaka, Atsushi Yoshida, Koichi Yoshida, Masao Ohtake, Naoki Fukuda, Hiroyuki Takeda, Daisuke Kameda, Kanenobu Tanaka, Naohito Inabe, Yoshiyuki Yanagisawa, Yasuyuki Gono, Hiroshi Watanabe, Hideaki Otsu, Hidetada Baba, Takashi Ichihara, Yoshitaka Yamaguchi, Maya Takechi, Shunji Nishimura, Hideki Ueno, Akihiro Yoshimi, Hiroyoshi Sakurai, Tohru Motobayashi, Taro Nakao1, Yutaka Mizoi2, Masafumi Matsushita3, Kazuo Ieki3, Nobuyuki Kobayashi4, Kana Tanaka4, Yosuke Kawada4, Naoki Tanaka4, Shigeki Deguchi4, Yoshiteru Satou4, Yosuke Kondo4, Takashi Nakamura4, Kenta Yoshinaga5, Chihiro Ishii5, Hideakira Yoshii5, Yuki Miyashita5, Nobuya Uematsu5, Yasutsugu Shiraki5, Toshiyuki Sumikama5, Junsei Chiba5, Eiji Ideguchi6, Akito Saito6, Takayuki Yamaguchi7, Isao Hachiuma7, Takeshi Suzuki7, Tetsuaki Moriguchi8, Akira Ozawa8, Takashi Ohtsubo9, Michael A. Famiano10, Hans Geissel11, Anthony S. Nettleton12, Oleg B. Tarasov12, Daniel P. Bazin12, Bradley M. Sherrill12, Shashikant L. Manikonda13, and Jerry A. Nolen13

RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
1Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
2Department of Engineering Science, Osaka Electro-Communication University, 18-8 Hatsucho, Neyagawa, Osaka 572-8530, Japan
3Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
4Department of Physics, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
5Faculty of Science and Technology, Tokyo University of Science, 2461 Yamazaki, Noda, Chiba 278-8510, Japan
6Center for Nuclear Study, University of Tokyo, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
7Department of Physics, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570, Japan
8Institute of Physics, University of Tsukuba, 1-1-1 Ten'noudai, Tsukuba, Ibaraki 305-8571, Japan
9Institute of Physics, Niigata University, 8050 Ikarashi 2-no-cho, Nishi-ku, Niigata 950-2181, Japan
10Department of Physics, Western Michigan University (WMU), 1903 W. Michigan Avenue, Kalamazoo, Michigan 49008-5252, U.S.A.
11Gesellschaft fuer Schwerionenforshung (GSI) mbH, 1 Planckstr, Darmstadt 64291, Germany
12National Superconducting Cyclotron Laboratory (NSCL), Michigan State University (MSU), 1 Cyclotron, East Lansing, Michigan 48824-1321, U.S.A.
13Argonne National Laboratory (ANL), 9700 S. Cass Avenue, Argonne, Illinois 60439, U.S.A.

(Received March 19, 2010; Accepted May 27, 2010; Published July 12, 2010)

A search for new isotopes using in-flight fission of a 345 MeV/nucleon 238U beam has been carried out at the RI Beam Factory at the RIKEN Nishina Center. Fission fragments were analyzed and identified by using the superconducting in-flight separator BigRIPS. We observed 45 new neutron-rich isotopes: 71Mn, 73,74Fe, 76Co, 79Ni, 81,82Cu, 84,85Zn, 87Ga, 90Ge, 95Se, 98Br, 101Kr, 103Rb, 106,107Sr, 108,109Y, 111,112Zr, 114,115Nb, 115,116,117Mo, 119,120Tc, 121,122,123,124Ru, 123,124,125,126Rh, 127,128Pd, 133Cd, 138Sn, 140Sb, 143Te, 145I, 148Xe, and 152Ba. ©2010 The Physical Society of Japan

URL: http://jpsj.ipap.jp/link?JPSJ/79/073201/
DOI: 10.1143/JPSJ.79.073201


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