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

Journal Article · Mon Nov 01 04:00:00 EST 2004 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.70.057303· OSTI ID:20695779

Zhang, Y H; Fang, Y D; Wang, H L; Zhou, X H; Guo, W T; Liu, M L; Guo, Y X; Lei, X G ^[1]; De Angelis, G ^[2]; Marginean, N; Gadea, A; Napoli, D R; Axiotis, M; Rusu, C; Martinez, T ^[2]; Oshima, M; Toh, Y ^[3]

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1. Institute of Modern Physics, Chinese Academy of Science, Lanzhou (China)
2. Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Legnaro (Italy)
3. Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki 319-1195 (Japan)

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.

• OSTI ID: 20695779
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 70; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALIGNMENT
E2-TRANSITIONS
GOLD 184
GROUND STATES
HIGH SPIN STATES
M1-TRANSITIONS
MEV RANGE
PARITY
POLARIZATION
PROBABILITY
SCATTERING
SILICON 29 REACTIONS
SPIN
TERBIUM 159 TARGET