Evidence of oblate-prolate shape coexistence in the strongly-deformed nucleus 119Cs

Zheng, Kaikai; Petrache, C. M.; Zhang, Z.H.; Zhao, P. W.; Wang, Y.K.; Astier, A.; Lyu, Bo; Greenlees, P. T.; Grahn, T.; Julin, R.; Juutinen, S.; Luoma, Minna‐Liisa; Ojala, J.; Pakarinen, J.; Partanen, J.; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M.; Sarén, J.; Tann, H.; Uusitalo, J.; Zimba, G.; Cederwall, B.; Aktaş, Ö.; Ertoprak, A.; Zhang, W.; Guo, S.; Liu, M.L.; Kuti, I.; Nyakó, B. M.; Sohler, D.; Tímár, J.; Andreoiu, C.; Doncel, M.; Joss, D. T.; Page, R. D.

doi:10.1016/j.physletb.2021.136645

Cited by 6 publications

(25 citation statements)

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“…Band 1, previously known up to spin 35/2 − [7], was extended up to spin (67/2 − ) in Ref. [15]. A half-life of T 1/2 = 55(5) μs was also deduced in Ref.…”

Section: B Resultsmentioning

confidence: 75%

“…The experimental information on the γ -ray transitions of 119 Cs, including the results that we published previously in Refs. [14,15] and the new ones reported here, is given in Table II of the Appendix.…”

Section: B Resultsmentioning

confidence: 99%

“…The band labels are in agreement with those employed in Refs. [14,15] in which partial level schemes have been published: Bands 1, 3, 4, and 5 in Ref. [15] which reported the evidence of oblate-prolate coexistence close to the ground state, and Bands 8, 9, and 10 in Ref.…”

Section: B Resultsmentioning

confidence: 99%

“…[14,15] in which partial level schemes have been published: Bands 1, 3, 4, and 5 in Ref. [15] which reported the evidence of oblate-prolate coexistence close to the ground state, and Bands 8, 9, and 10 in Ref. [14] which reported chiral doublet bands.…”

Section: B Resultsmentioning

confidence: 99%

“…The known bands have been extended at very high spin, and several new rotational bands have been identified: two positive-parity bands which decay to the known π [404]9/2 + strongly coupled band [14], and two positive-parity and one negative-parity bands built on prolate and oblate shapes, respectively [15]. These results revealed two exotic features of the band structure of 119 Cs: i) the existence of a new type of chiral bands which involve only protons, one in the strongly coupled π [404]9/2 + orbital and two in π h 11/2 orbitals (Bands 8, 9, 10) [14]; ii) the existence of coexisting oblate and prolate shapes close to the ground state, which give rise to rotational bands with completely differ-ent behavior, one decoupled built on the π [541]3/2 − orbital (Band 1) and one strongly coupled built on the π [505]11/2 − orbital (Band 3) [15]. This two results represent discoveries of new phenomena, that is chirality with only protons in the back-bending regime and a new region of oblate-prolate shape coexistence in strongly deformed nuclei at the proton dripline.…”

Section: Introductionmentioning

confidence: 99%

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Complete set of proton excitations in Cs119

Zheng¹,

Petrache²,

Zhang³

et al. 2021

Phys. Rev. C

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The very neutron-deficient strongly deformed 119 Cs nucleus has been studied using the 58 Ni( 64 Zn, 3p) reaction and the JUROGAM 3 γ -ray detector array coupled to the MARA recoil-mass separator setup. The excitation energies of all observed bands have been determined, spins and parities have been firmly assigned to most of the observed states. The previously known and the newly identified rotational bands have been extended to very high spin and excitation energy. The configurations of the observed bands are discussed using the particle number conserving cranked shell model. The present study establishes the largest set of rotational bands observed in the proton-rich A ≈ 120 mass region.

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“…Band 1, previously known up to spin 35/2 − [7], was extended up to spin (67/2 − ) in Ref. [15]. A half-life of T 1/2 = 55(5) μs was also deduced in Ref.…”

Section: B Resultsmentioning

confidence: 75%

Section: B Resultsmentioning

confidence: 99%