The band built on the K-pi = 8(-), T-1/2 = 9.4 ms isomer of( 130)Ba has been identified, filling the gap in the systematics of the dipole bands built on the 8(- )isomers in the N = 74 isotones from( 128)Xe to Gd-138. The use of the GALILEO array in conjunction with its ancillaries EUCLIDES and Neutron Wall, helped to firmly place the newly identified transitions on top of the long-lived isomer. The extracted g(K)and g(R) gyromagnetic factors are in agreement with the 7/2( )[404] circle times 9/2(-)[514] two-neutron Nilsson configuration. Particle-rotor model calculations give an understanding of the limited degree of K mixing. The experimental information on the K-pi = 8(-) isomer of Ba-130 is now the most complete among the K isomers of the N = 74 isotones.

NEUTRON WALL; PARTICLE; STATES; BAND

Institute of Modern Physics, Chinese Academy of Sciences; Centre de Sciences Nucléaires et Sciences de la Matière, CNRS/IN2P3, Université Paris-Saclay; University of Surrey; Dipartimento di Fisica e Astronomia dell’Universit, and INFN; Technische Universität München; Institute of Modern Physics, Chinese Academy of Sciences; INFN Laboratori Nazionali di Legnaro; Simon Fraser University; KTH Department of Physics; iThemba LABS, National Research Foundation; 12Institute for Nuclear Research, Hungarian Academy of Sciences; University of Warsaw; Peking University