Shape-driving effects in the triaxial nucleus,<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Xe</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>128</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>

Orce, J. N.; Bruce, A. M.; Emmanouilidis, A.; Byrne, Aidan; Dracoulis, George; Kibédi, T.; Caamaño, M.; El-Masri, H.; Pearson, C. J.; Podolyák, Zs.; Stevenson, P. D.; Walker, P. M.; Fang, Xu; Cullen, D. M.; Wheldon, C.

doi:10.1103/physrevc.74.034318

Cited by 24 publications

(19 citation statements)

References 29 publications

(55 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The first important result of the present work is the observation of the odd-spin bands S1 and S2o , of the even-spin bands S1 and S2o. There is very scarce experimental information on such odd-spin states decaying to the states of the S-bands, typically only a few levels being observed [26][27][28][29][30][31][32]. Their interpretation is often handwaving, invoking the γ-band built on the S-bands, or is completely missing.…”

Section: Discussionmentioning

confidence: 99%

Diversity of shapes and rotations in the γ-soft 130Ba nucleus: First observation of a t-band in the A = 130 mass region

et al. 2019

View full text Add to dashboard Cite

Several new bands have been identified in 130 Ba, among which there is one with band-head spin 8 + . Its properties are in agreement with the Fermi-aligned νh 2 11/2 , 7/2 − [523] ⊗ 9/2 − [514] Nilsson configuration. This is the first observation of a two-quasiparticle t-band in the A=130 mass region. The t-band is fed by a dipole band involving two additional h 11/2 protons. The odd-spin partners of the proton and neutron S-bands and the ground-state band at high spins are also newly identified. The observed bands are discussed using several theoretical models, which strongly suggest the coexistence of prolate and oblate shapes polarized by rotation aligned two-proton and two-neutron configurations, as well as prolate collective rotations around axes with different orientations. With the new results, 130 Ba presents one of the best and most complete sets of collective excitations that a γ-soft nucleus can manifest at medium and high spins, revealing a diversity of shapes and rotations for the nuclei in the A = 130 mass region.

show abstract

Section: Discussionmentioning

confidence: 99%

Diversity of shapes and rotations in the γ-soft 130Ba nucleus: First observation of a t-band in the A = 130 mass region

et al. 2019

View full text Add to dashboard Cite

show abstract

“…where ω is the rotational frequency. We used the values for the neighboring even-even nucleus 128 Xe [18] (J 0 = 17.0 MeV −1 2 and J1 = 25.0 MeV −3 4 ).…”

Section: Theoretical Calculationmentioning

confidence: 99%

Shapes and Symmetries in A ∼ 130 Nuclei: A Perspective through Measured Transition Probabilities

Das¹

2021

Bulg.J.Phys.

View full text Add to dashboard Cite

We investigated two isotones (N = 74) -129 Cs and 127 I in the mass region 130 -both with moderate deformation, exhibiting signature splitting in their positive-parity bands based on the πg 7/2 configuration. Interestingly, signature inversion occurs in 127 I at low spin (19/2 + ), while no inversion has been observed for 129 Cs. Here we present some new results on the reduced transition probability B(E2) for states belonging to 127 I. The lifetimes in picoseconds were measured using the Doppler Shift Attenuation Method (DSAM). We utilized the single quasi-particle rotor model to theoretically describe our results, which suggest higher deformation and triaxiality (ε 2 = 0.23, γ = 28 • in Lund convention) for 127 I than for 129 Cs (ε 2 = 0.15, γ = 18 • ).

show abstract

“…These quantities can be obtained by transforming experimental energies into the rotating frame. Figure [38] has been assumed.…”

Section: B Multi-qp Excitations and Configuration Assignmentsmentioning

confidence: 99%

Abnormal signature inversion and multiple alignments in doubly odd126I

Zheng

Zhu

et al. 2012

Phys. Rev. C

View full text Add to dashboard Cite

High-spin states in 126 I have been investigated by using in-beam γ -ray spectroscopy with the 124 Sn( 7 Li, 5n) 126 I reaction at a beam energy of 48 MeV. The level scheme of 126 I has been extended and modified considerably by adding about 80 new γ rays and establishing five new bands. The configurations have been tentatively assigned for the yrast, yrare, and other excited bands with the help of triaxial projected shell-model (TPSM) and cranked shell-model calculations. The first band crossing in the yrast band is found due to alignments of a pair of (h 11/2 ) 2 neutrons. The first and the second band crossings in the yrare band are caused by the alignments of a pair of (d 5/2 ) 2 protons and a pair of (h 11/2 ) 2 neutrons, respectively. Due to the successive excitations of two, four, and six quasiparticles, the alignments in the yrare band present a gigantic rising feature. The yrast band exhibits a signature inversion at low spins and becomes normal after a reversion spin of I rev = 14. The yrare band exhibits an abnormal signature inversion in which the signature inversion phase persists up to the highest spin. The signature inversions in 126 I are well reproduced and successfully interpreted by the TPSM calculations. Some features of chirality are found for the four-quasiparticle (4qp) part of the yrast band and the 4qp excited band 2.

show abstract

Shape-driving effects in the triaxial nucleus,Xe128

Cited by 24 publications

References 29 publications

Diversity of shapes and rotations in the γ-soft 130Ba nucleus: First observation of a t-band in the A = 130 mass region

Diversity of shapes and rotations in the γ-soft 130Ba nucleus: First observation of a t-band in the A = 130 mass region

Shapes and Symmetries in A ∼ 130 Nuclei: A Perspective through Measured Transition Probabilities

Abnormal signature inversion and multiple alignments in doubly odd126I

Contact Info

Product

Resources

About

Shape-driving effects in the triaxial nucleus,Xe128

Cited by 24 publications

References 29 publications

Diversity of shapes and rotations in the γ-soft 130Ba nucleus: First observation of a t-band in the A = 130 mass region

Diversity of shapes and rotations in the γ-soft 130Ba nucleus: First observation of a t-band in the A = 130 mass region

Shapes and Symmetries in A ∼ 130 Nuclei: A Perspective through Measured Transition Probabilities

Abnormal signature inversion and multiple alignments in doubly odd126I

Contact Info

Product

Resources

About

Diversity of shapes and rotations in the γ-soft 130Ba nucleus: First observation of a t-band in the A = 130 mass region

Diversity of shapes and rotations in the γ-soft 130Ba nucleus: First observation of a t-band in the A = 130 mass region