Abstract
The discovery of the important neutron-rich nucleus and seven others near the limits of nuclear stability is reported from the fragmentation of a projectile beam on targets at the radioactive ion-beam factory of the RIKEN Nishina Center. The produced fragments were analyzed and unambiguously identified using the BigRIPS two-stage in-flight separator. The eight new neutron-rich nuclei discovered, , , , , , , and , are the most neutron-rich isotopes of the respective elements. In addition, one event consistent with was registered. The results are compared with the drip lines predicted by a variety of mass models and it is found that the models in best agreement with the observed limits of existence in the explored region tend to predict the even-mass Ca isotopes to be bound out to at least .
- Received 7 May 2018
- Revised 11 June 2018
DOI:https://doi.org/10.1103/PhysRevLett.121.022501
© 2018 American Physical Society