Identification Of 45 New Neutron-Rich Isotopes Produced By In-Flight Fission Of A U-238 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 Nakao,Yutaka Mizoi,Masafumi Matsushita,Kazuo Ieki,Nobuyuki Kobayashi,Kana Tanaka,Yosuke Kawada,Naoki Tanaka,Shigeki Deguchi,Yoshiteru Satou,Yosuke Kondo,Takashi Nakamura,Kenta Yoshinaga,Chihiro Ishii,Hideakira Yoshii,Yuki Miyashita,Nobuya Uematsu,Yasutsugu Shiraki,Toshiyuki Sumikama,Junsei Chiba,Eiji Ideguchi,Akito Saito,Takayuki Yamaguchi,Isao Hachiuma,Takeshi Suzuki,Tetsuaki Moriguchi,Akira Ozawa,Takashi Ohtsubo,Michael A. Famiano,Hans Geissel,Anthony S. Nettleton,Oleg B. Tarasov,Daniel P. Bazin,Bradley M. Sherrill,Shashikant L. Manikonda,Jerry A. Nolen

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN（2010）

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摘要

A search for new isotopes using in-flight fission of a 345 MeV/nucleon U-238 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: Mn-71, Fe-73,Fe-74, Co-76, Ni-79, Cu-81,Cu-82, Zn-84,Zn-85, Ga-87, Ge-90, Se-95, Br-98, Kr-101, Rb-103, Sr-106,Sr-107, Y-108,Y-109, Zr-111,Zr-112, Nb-114,Nb-115, Mo-115,Mo-116,Mo-117, Tc-119,Tc-120, (121,122,123),Ru-124, Rh-123,Rh-124,Rh-125,Rh-126, Pd-127,Pd-128, Cd-133, Sn-138, Sb-140, Te-143, I-145, Xe-148, and Ba-152.

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关键词

nuclear reactions Be(U-238, x) and Pb(U-238, x) E=345 MeV/nucleon, In-flight fission, New isotopes, RI beam separator

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