Identification of 25 new neutron-rich isotopes produced in the EURICA uranium beam campaign at RIKEN RIBF

The EUROBALL RIKEN Cluster Array (EURICA) collaboration aims to conduct isomer and $\beta $-delayed $\gamma $-ray spectroscopy of several hundred nuclei far from stability. In 2012 and 2013, at the RIKEN Nishina Center RI Beam Factory, the EURICA uranium beam campaign was been conducted to investigate isomeric decays from very neutron-rich nuclei and their $\beta $ decays. In the EURICA uranium beam campaign, the nuclei of interest were produced by the in-flight fission of 345 MeV/nucleon $^{238}$U beam colliding with a Be target. Fission fragments were identified by using the superconducting in-flight separator BigRIPS. The particle identification was performed using the $\Delta $E-TOF-B$\rho $ method. We observed 25 new neutron-rich isotopes: $^{116}$Nb, $^{118}$Mo, $^{121,122}$Tc, $^{125}$Ru, $^{127}$Rh, $^{129,130,131}$Pd, $^{132}$Ag, $^{134}$Cd, $^{136,137,138}$In, $^{139,140}$Sn, $^{141,142,143}$Sb, $^{144,145}$Te, $^{146,147}$I, $^{149}$Xe, and $^{154}$Ba. In this contribution, details of the measurement and analysis will be presented.