Physics Letters B (Aug 2019)
Discovery of 68Br in secondary reactions of radioactive beams
- K. Wimmer,
- P. Doornenbal,
- W. Korten,
- P. Aguilera,
- A. Algora,
- T. Ando,
- T. Arici,
- H. Baba,
- B. Blank,
- A. Boso,
- S. Chen,
- A. Corsi,
- P. Davies,
- G. de Angelis,
- G. de France,
- D.T. Doherty,
- J. Gerl,
- R. Gernhäuser,
- D.G. Jenkins,
- S. Koyama,
- T. Motobayashi,
- S. Nagamine,
- M. Niikura,
- A. Obertelli,
- D. Lubos,
- B. Rubio,
- E. Sahin,
- T.Y. Saito,
- H. Sakurai,
- L. Sinclair,
- D. Steppenbeck,
- R. Taniuchi,
- R. Wadsworth,
- M. Zielinska
Affiliations
- K. Wimmer
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan; Corresponding author.
- P. Doornenbal
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- W. Korten
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- P. Aguilera
- Comisión Chilena de Energía Nuclear, Casilla 188-D, Santiago, Chile
- A. Algora
- Instituto de Fisica Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain; Institute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen H-4026, Hungary
- T. Ando
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- T. Arici
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany; Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany
- H. Baba
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- B. Blank
- CENBG, CNRS/IN2P3, Université de Bordeaux F-33175 Gradignan, France
- A. Boso
- Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy
- S. Chen
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- A. Corsi
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- P. Davies
- Department of Physics, University of York, YO10 5DD York, United Kingdom
- G. de Angelis
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
- G. de France
- GANIL, CEA/DSM-CNRS/IN2P3, F-14076 Caen Cedex 05, France
- D.T. Doherty
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- J. Gerl
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- R. Gernhäuser
- Physik Department, Technische Universität München, D-85748 Garching, Germany
- D.G. Jenkins
- Department of Physics, University of York, YO10 5DD York, United Kingdom
- S. Koyama
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- T. Motobayashi
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- S. Nagamine
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- M. Niikura
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- A. Obertelli
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- D. Lubos
- Physik Department, Technische Universität München, D-85748 Garching, Germany
- B. Rubio
- Instituto de Fisica Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain
- E. Sahin
- Department of Physics, University of Oslo, PO Box 1048 Blindern, N-0316 Oslo, Norway
- T.Y. Saito
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- H. Sakurai
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- L. Sinclair
- Department of Physics, University of York, YO10 5DD York, United Kingdom
- D. Steppenbeck
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- R. Taniuchi
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- R. Wadsworth
- Department of Physics, University of York, YO10 5DD York, United Kingdom
- M. Zielinska
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- Journal volume & issue
-
Vol. 795
pp. 266 – 270
Abstract
The proton-rich isotope 68Br was discovered in secondary fragmentation reactions of fast radioactive beams. Proton-rich secondary beams of 70,71,72Kr and 70Br, produced at the RIKEN Nishina Center and identified by the BigRIPS fragment separator, impinged on a secondary 9Be target. Unambiguous particle identification behind the secondary target was achieved with the ZeroDegree spectrometer. Based on the expected direct production cross sections from neighboring isotopes, the lifetime of the ground or long-lived isomeric state of 68Br was estimated. The results suggest that secondary fragmentation reactions, where relatively few nucleons are removed from the projectile, offer an alternative way to search for new isotopes, as these reactions populate preferentially low-lying states. Keywords: Radioactive beams, New isotope, Direct reaction
