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【期刊论文】Properties of the πi13/2⊗vi13/2 band in odd-odd 184Au
张玉虎, Y. H. Zhang, , Y. D. Fang, G. de Angelis, N. Marginean, A. Gadea, D. R. Napoli, M. Axiotis, C. Rusu, T. Martinez, H. L. Wang, X. H. Zhou, W. T. Guo, M. L. Liu, Y. X. Guo, X. G. Lei, M. Oshima, and Y. Toh
PHYSICAL REVIEW C 70, 057303 (2004),-0001,():
-1年11月30日
High-spin level structure in 184Au has been reinvestigated using the multidetector array of GASP via the 159Tbs29Si,4n gd184Au reaction at a beam energy of 140 MeV. The ground-state band and the excited πi13/2⊗vi13/2 2-qp band have been extended up to lower and higher spin states. An upbend has been observed in the excited band at hω~0.25 MeV and is interpreted as resulting from a pair of πh9/2 alignment. This lowfrequency (πh9/2)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 πi13/2⊗vi13/2 band in 184Au. This result provides strong evidence for the low-spin signature inversion in the πi13/2⊗vi13/2 bands of odd-odd nuclei in the A,180 mass region.
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【期刊论文】High-spin level scheme of 183Au
张玉虎, L. T. Song, , X. H. Zhou, Y. H. Zhang, G. de Angelis, N. Marginean, A. Gadea, D. R. Napoli, M. Axiotis, C. Rusu, T. Martinez, Y. X. Guo, X. G. Lei, Y. Zheng, and M. L. Liu
PHYSICAL REVIEW C 71, 017302 (2005),-0001,():
-1年11月30日
High-spin states in 183Au have been studied experimentally using the 159Tb(29Si, 5n)183Au reaction at a beam energy of 140 MeV. Three- or higherfold γ-ray coincidences have been measured using the detector array of GASP. The level scheme of 183Auwas revised and extended.Arotational band proposed as the unfavored signature branch of the πi13/2 band has been observed for 183Au. Interaction properties between the two negative-signature bands of the πh9/2-π7/2 system have been discussed for the light odd-A Au nuclei.
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张玉虎, Y.H. Zhang, a, M. Oshima, Y. Toh, M. Koizumi, A. Osa, T. Shizuma, T. Hayakawa, M. Sugawara, H. Kusakari, T. Morikawa, S.X. Wen, and L.H. Zhu
Eur. Phys. J. A 13, 429-433 (2002),-0001,():
-1年11月30日
Abstract. High-spin states in 176Ir have been investigated via the 149Sm (31P, 4nγ) 176Ir reaction through excitation functions, X-γ and γ-γ coincidence measurements. Four rotational bands have been identified for the first time and their configurations are suggested on the basis of the existing knowledge of band structures in odd-odd nuclei as well as the measured in-band B(M1)/B(E2) ratios. Among the four bands observed, the πh9/2⊗νi13/2 and πi13/2⊗νi13/2 bands exhibit an anomalous signature splitting. The signature inversion point is observed in the former at Ic=18 which is consistent with expectations; this signature inversion spin in the πi13/2⊗νi13/2 band may be larger than 25. The combined effects of Coriolis and p-n residual interactions involved in such an inversion phenomenon have been discussed qualitatively.
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【期刊论文】Observation of signature inversion in odd-odd 178Ir
张玉虎, Y.H. Zhang, a, T. Hayakawa, M. Oshima, Y. Toh, J. Katakura, Y. Hatsukawa, M. Matsuda, N. Shinohara, T. Ishii, H. Kusakari, M. Sugawara, and T. Komatsubara
Eur. Phys. J. A 8, 439-442 (2000),-0001,():
-1年11月30日
High spin states in 178Ir have been studied via the 152Sm (31P,5nγ) 178Ir reaction through excitation functions, X-γ and γ-γ-t coincidence measurements. According to the band structure characteristics and the measured intraband B(M1)/B(E2) ratios, two rotational bands are identified and assigned to be associated with the πh9/2⊗νi13/2 and πh11/2⊗νi13/2 configurations, respectively. Both bands show the signature inversion feature.
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【期刊论文】Rotational bands and signature inversion in odd-odd 172Re
张玉虎, Y. H. Zhang, , M. Oshima, Y. Toh, X. H. Zhou, M. Koizumi, A. Osa, A. Kimura, Y. Hatsukawa, T. Morikawa, M. Nakamura, . M. Sugawara, H. Kusakari, T. Komatsubara, K. Furuno, H. L. Wang, P. Luo, C. S. Wu, and F. R. Xu
PHYSICAL REVIEW C 68, 054313 (2003),-0001,():
-1年11月30日
High-spin states in the odd-odd 172Re have been investigated via the 149Sm(27Al, 4nγ)172Re reaction through excitation functions, x-γ and γ-γ coincidence measurements. A level scheme consisting of three rotational bands has been identified for the first time extending the high-spin studies of A~160 odd-odd nuclei to the currently lightest rhenium isotope. The three bands have been assigned to be built on the πh11/2⊗νi13/2, πh9/2⊗νi13/2, and p1/2−[541]⊗ν1/2−[521] configurations according to their rotational properties in quasiparticle alignments, signature splitting, in-band B(M1)/B(E2) ratios, level spacing systematics, band crossing frequencies, as well as the existing knowledge in neighboring nuclei. Low-spin signature inversion has been confirmed in the first two bands due to the observation of signature crossing at high-spin states. The general features of inversion phenomenon in the semidecoupled bands are presented and discussed with reference to theoretical calculations of two quasiparticle plus rotor model including p-n interactions.
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