Complete set of proton excitations in 
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Zheng, Kaikai; Petrache, C. M.; Zhang, Z. H.; 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.; Zhou, X. H.; Kuti, I.; Nyakó, B. M.; Sohler, D.; Tímár, J.; Andreoiu, C.; Doncel, M.; Joss, D. T.; Page, R. D.

doi:10.1103/physrevc.104.044305

Cited by 8 publications

(11 citation statements)

References 29 publications

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“…[16], in which the energies of the four low-lying isomers are calculated between zero and 161 keV. However, as discussed above, not all bands observed in 118 Cs could be interconnected by γ -ray transitions, as in the case of the neighboring 119 Cs and 119 Ba [19,20], and therefore their relative excitation energies could not be established. This uncertainty also induces an inherent difficulty in the assignment of spins and parities to the observed bands.…”

Section: A General Considerationsmentioning

confidence: 97%

“…The structure of the odd-odd nucleus 118 Cs is more complex than that of the odd-even neighboring nuclei 119 Cs and 119 Ba, on which detailed experimental information and theoretical interpretations have been reported very recently [19,20,23,24]. Its discussion should start from the two known long-lived isomers, for which, however, the excitation energies and parities have not been experimentally established [12,13].…”

Section: A General Considerationsmentioning

confidence: 99%

“…In the configuration assignment process we took into account the alignment properties discussed in the preceding section, the relative intensities and decay properties of the bands, as well as the systematics of both odd-even and oddodd nuclei in the region. Of considerable help were our recent works on 119 Cs and 119 Ba [19,20], in which we assigned configurations to all low-lying bands based on similar calculations. We adopted an axial deformation with ε 2 = 0.32, similar to that used for 119 Cs and 119 Ba.…”

Section: Particle Number Conserving Cranked Shell-model Calculationsmentioning

confidence: 99%

“…Very recently, we have studied the odd-even nuclei 119 Cs [19] and 119 Ba [20], in which extended sets of singlequasiparticle proton and neutron excitations have been established. In both nuclei we identified low-lying isomers, with half-lives of T 1/2 = 0.36(2) μs and T 1/2 = 55(5) μs for the 5/2 − and 11/2 − bandheads of the bands based on neutron and proton h 11/2 orbitals in 119 Ba and 119 Cs, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…The presently reported experimental data have been obtained in an experiment performed with the high-efficiency γ -detector array JuroGam 3 [21] and the recoil mass separator MARA [22], using the 58 Ni( 64 Zn, 3pn) 118 Cs fusionevaporation reaction at a beam energy of 255 MeV. Several results obtained from the same experiment have been already published or submitted for publication on 119 Cs [19,23,24] and 119 Ba [20]. The experimental details are given in Ref.…”

Section: Introductionmentioning

confidence: 99%

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Rich band structure and multiple long-lived isomers in the odd-odd Cs118 nucleus

Zheng¹,

Petrache²,

Zhang³

et al. 2021

Phys. Rev. C

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Section: A General Considerationsmentioning

confidence: 97%

Section: A General Considerationsmentioning

confidence: 99%

Section: Particle Number Conserving Cranked Shell-model Calculationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Rich band structure and multiple long-lived isomers in the odd-odd Cs118 nucleus

Zheng¹,

Petrache²,

Zhang³

et al. 2021

Phys. Rev. C

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Observation of the proton emitter $${}_{\,57}^{116}$$La59

et al. 2022

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The quantum tunneling and emission of a single constituent nucleon provide a beautifully simple and unique window into the complex properties of atomic nuclei at the extreme edge of nuclear existence. In particular, for odd-odd proton emitting nuclides, the associated decay energy and partial half-life can be used to probe the correlations between the valence neutrons and protons which have been theoretically predicted to favour a new type of nuclear superfluidity, isoscalar neutron-proton pairing, for which the experimental “smoking gun" remains elusive. In the present work, proton emission from the lanthanum isotope $${}_{\,57}^{116}$$ 57 116 La59, 23 neutrons away from the only stable isotope $${}_{\,57}^{139}$$ 57 139 La82, is reported. 116La nuclei were synthesised in the fusion-evaporation reaction 58Ni(64Zn, p5n)116La and identified via their proton radioactivity using the mass spectrometer MARA (Mass Analysing Recoil Apparatus) and the silicon detectors placed at its focal plane. Comparisons of the measured proton energy (Ep = 718 ± 9 keV) and half-life (T1/2 = 50 ± 22 ms) with values calculated using the Universal Decay Law approach indicate that the proton is emitted with an orbital angular momentum l = 2 and that its emission probability is enhanced relative to its closest, less exotic, odd-even lanthanum isotope ($${}_{\,57}^{117}$$ 57 117 La60) while the proton-emission Q-value is lower. We propose this to be a possible signature for the presence of strong neutron-proton pair correlations in this exotic, neutron deficient system. The observations of γ decays from isomeric states in 116La and 117La are also reported.

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Refined description of the positive-parity bands and the extent of octupole correlations in Ba120

Lyu¹,

Petrache²,

Zheng³

et al. 2022

Phys. Rev. C

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Three new negative-parity bands have been identified in 120 Ba, two of them forming a strongly coupled band. The previously known negative-parity band is significantly extended to high spin, while the lower part of the yrare positive-parity band has been modified. From the analysis of the band properties and comparison with the neighboring nuclei a coherent description of all bands is achieved. In particular, a simple explanation of the evolution of the positive-parity bands at high spin is proposed, including the possible occupation of the ν f 7/2 [541]1/2 − intruder orbital. Cranked Nilsson-Strutinsky calculations reveal similar quadrupole deformations but different triaxiality of the bands, while particle number conserving cranked shell model calculations qualitatively reproduce the experimental data and support the assigned configurations. The new measured ratios of reduced transition probabilities B(E 1)/B(E 2) complete the systematics in the [118][119][120][121][122][123][124] Ba nuclei, exhibiting a decrease with decreasing neutron number, and are compared with the known values in the [116][117][118][119][120] Xe nuclei, which are larger. Extended calculations with the quadrupole and octupole collective Hamiltonian based on the relativistic Hartree-Bogoliubov model employing the relativistic DD-PC1 density functional nicely reproduce the decreasing trend towards lower neutron numbers for Ba and Xe nuclei, as well as the larger values in Xe nuclei, but are much larger in amplitude than the experimental values. On the other hand, particle number conserving cranked shell model calculations without octupole deformation overestimate the low-spin values, while those with octupole deformation included reproduce the experimental values in 120 Ba, suggesting the possible existence of moderate octupole collectivity in the negative-parity bands of nuclei in this mass region.

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Complete set of proton excitations in Cs119

Cited by 8 publications

References 29 publications

Rich band structure and multiple long-lived isomers in the odd-odd Cs118 nucleus

Rich band structure and multiple long-lived isomers in the odd-odd Cs118 nucleus

Observation of the proton emitter $${}_{\,57}^{116}$$La59

Refined description of the positive-parity bands and the extent of octupole correlations in Ba120

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