Rotational bands and signature inversion in odd-oddRe172

High-spin states in odd-odd174Re

“…Beyond these spin values, normal signature splitting is restored. These results fit the known systematics well: for the πh 9/2 ⊗ νi 13/2 configuration, the spin for signature crossing I c decreases with decreasing (increasing) two neutrons (protons) [7]; for the πh 11/2 ⊗ νi 13/2 configuration, the spin for signature crossing I c increases 2 ∼ 3h with decreasing (increasing) two neutrons (protons), in contrast to the former configuration [6].…”

“…Odd-A nuclei show many interesting high-spin phenomena, such as signature splitting, deformation driving effects, e.g., changes in deformation due to the occupation of specific orbitals by the odd nucleon, and so on. For odd-odd nuclei, the system becomes more complex due to a variety of coupling schemes among the valence nucleons and the core; some new phenomena appear such as the well-known low-spin signature inversion in a number of two-quasiparticle bands built on the πh 11/2 ⊗ νi 13/2 and πh 9/2 ⊗ νi 13/2 configurations [1][2][3][4][5][6][7]. The nuclei in the lighter W-Re-Os region are rather soft with respect to both the β and γ deformations.…”

Low-spin signature inversion in theπh9/2⊗νi13/2oblate band ofXie1, Zhou2, Zhang3 et al. 2005Phys. Rev. CSelf Cite11070View full textAdd to dashboardCite

“…As is well known, low-spin signature inversion in doubly odd nuclei was identified experimentally mainly by observing the change of the staggering phase at medium angular momentum [2,[4][5][6][7][8][9][10]. For the πh 9/2 ⊗ νi 13/2 oblate configuration, the interplay between the Coriolis and p-n residual interactions, which favor the odd and even spins, respectively, is expected to produce at a given spin (inversion point) a mutual cancellation of the opposite contributions to the staggering.…”

“…[4,6,7,16] and references therein). In these bands, the α f p−n = α f p + α f n = 1/2 + 1/2 = 1 favored signature branch lies higher in energy than the α uf p−n = α f p + α uf n = 1/2 − 1/2 = 0 unfavored signature branch at low and medium spins, and the signature splitting reverts to the normal ordering at higher-spin states [4,6,7,16]. However, the signature inversion associated with the oblate πh 9/2 ⊗ νi 13/2 configuration has not been definitely established so far owing to experimental difficulties.…”

“…Low-spin signature inversion has been systematically observed in deformed odd-odd nuclei throughout the chart of nuclides (see Refs. [2,[4][5][6][7][8][9][10], and references therein), related to the high-j πg 9/2 ⊗ νg 9/2 , πh 11/2 ⊗ νh 11/2 , πh 11/2 ⊗ νi 13/2 , πh 9/2 ⊗ νi 13/2 , and πi 13/2 ⊗ νi 13/2 configurations. Great theoretical efforts have been devoted to the understanding of low-spin signature inversion in deformed odd-odd nuclei.…”