Identification of high-K rotation in Ba-130: Testing the consistency of electromagnetic observables

作者：Qiang, Y. H.; Petrache, C. M.^*; Guo, S.^*; Walker, P. M.; Mengoni, D.; Chen, Q. B.; Lv, B. F.; Astier, A.; Dupont, E.; Liu, M. L.; Zhou, X. H.; Wang, J. G.; Bazzacco, D.; Boso, A.; Goasduff, A.; Recchia, F.; Testov, D.; Galtarossa, F.; Jaworski, G.; Napoli, D. R.; Riccetto, S.; Siciliano, M.; Valiente-Dobon, J. J.; Andreoiu, C.; Garcia, F. H.; Ortner, K.; Whitmore, K.; Cederwall, B.; Lawrie, E. A.; Kuti, F.; Solder, D.; Marchlewski, T.; Srebrny, J.; Tucholski, A.

来源：PHYSICAL REVIEW C, 2019, 99(1): 014307.

DOI：10.1103/PhysRevC.99.014307

• NEUTRON WALL
• PARTICLE
• STATES
• BAND

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.

• 出版日期2019-1-8
• 单位中国科学院大学; 中国科学院近代物理研究所; 北京大学; 兰州大学