Abstract
Neutron-rich radioactive isotope (RI) beams in the vicinity of were produced using the in-flight fission of a 345-MeV/nucleon beam at the RIKEN Radioactive Isotope Beam Factory. The RI beams were separated in flight by the large-acceptance two-stage fragment separator BigRIPS. Isotopes were clearly identified in a low-background particle-identification plot, which was obtained from the measurements of time of flight, magnetic rigidity, and energy loss using beam-line detectors placed in the BigRIPS separator and the ZeroDegree spectrometer. Nine new isotopes, , and , are reported for the first time, with their measured production cross sections compared with the extrapolations of lighter isotopes down to the femtobarn regime.
- Received 6 July 2020
- Accepted 13 January 2021
DOI:https://doi.org/10.1103/PhysRevC.103.014614
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