Properties of the {pi}i{sub 13/2}x{nu}i{sub 13/2} band in odd-odd {sup 184}Au

• Published in: Physical review. C, Nuclear physics Nuclear physics, 2004-11, Vol.70 (5)
• Main Authors: Zhang, Y.H., Fang, Y.D., Wang, H.L., Zhou, X.H., Guo, W.T., Liu, M.L., Guo, Y.X., Lei, X.G., De Angelis, G., Hahn-Meitner-Institut, Berlin, Marginean, N., Gadea, A., Napoli, D.R., Axiotis, M., Rusu, C., Martinez, T., Oshima, M., Toh, Y.
• Format: Article
• Language: English
• Subjects: ALIGNMENT; E2-TRANSITIONS; GOLD 184; GROUND STATES; HIGH SPIN STATES; M1-TRANSITIONS; MEV RANGE; NUCLEAR PHYSICS AND RADIATION PHYSICS; PARITY; POLARIZATION; PROBABILITY; SCATTERING; SILICON 29 REACTIONS; SPIN; TERBIUM 159 TARGET
• ISSN: 0556-2813; 1089-490X
• DOI: 10.1103/PhysRevC.70.057303

High-spin level structure in {sup 184}Au has been reinvestigated using the multidetector array of GASP via the {sup 159}Tb({sup 29}Si,4n{gamma}){sup 184}Au reaction at a beam energy of 140 MeV. The ground-state band and the excited {pi}i{sub 13/2}x{nu}i{sub 13/2} 2-qp band have been extended up to lower and higher spin states. An upbend has been observed in the excited band at ({Dirac_h}/2{pi}){omega}{approx}0.25 MeV and is interpreted as resulting from a pair of {pi}h{sub 9/2} alignment. This low-frequency ({pi}h{sub 9/2}){sup 2} alignment is supported by the measured B(M1)/B(E2) ratios and alignment properties in neighboring odd-A nuclei. The linking transitions between the two bands and to the ground state have been established leading to a firm spin-and-parity assignment for the {pi}i{sub 13/2}x{nu}i{sub 13/2} band in {sup 184}Au. This result provides strong evidence for the low-spin signature inversion in the {pi}i{sub 13/2}x{nu}i{sub 13/2} bands of odd-odd nuclei in the A{approx}180 mass region.