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Discovery of 68Br in secondary reactions of radioactive beams

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Author(s)

  • K. Wimmer
  • P. Doornenbal
  • W. Korten
  • P. Aguilera
  • A. Algora
  • T. Ando
  • T. Arici
  • H. Baba
  • B. Blank
  • A. Boso
  • S. Chen
  • A. Corsi
  • G. de Angelis
  • G. de France
  • J. Gerl
  • R. Gernhäuser
  • 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
  • M. Zielinska

Department/unit(s)

Publication details

JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
DateAccepted/In press - 10 Jun 2019
DatePublished (current) - 10 Aug 2019
Volume795
Number of pages5
Pages (from-to)266-270
Original languageEnglish

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.

Bibliographical note

© 2019 The Authors.

    Research areas

  • Direct reaction, New isotope, Radioactive beams

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