K-mixing in the doubly mid-shell nuclide 170Dy and the role of vibrational degeneracy

Söderström, P.-A.; Walker, P. M.; Wu, J.; Liu, H. L.; Regan, P. H.; Watanabe, H.; Doornenbal, P.; Korkulu, Z.; Lee, P.; Liu, J. J.; Lorusso, G.; Nishimura, S.; Phong, V. H.; Sumikama, T.; Fang, Xu; Yagi, A.; Zhang, G. X.; Ahn, D. S.; Alharbi, T.; Baba, H.; Browne, F.; Bruce, A. M.; Carroll, R.; Chae, K. Y.; Dombrádi, Zs.; Estradé, A.; Fukuda, N.; Griffin, C. J.; Ideguchi, E.; Inabe, N.; Isobe, T.; Kanaoka, H.; Kanaya, S.; Kojouharov, I.; Kondev, F. G.; Kubo, T.; Kubo, T.; Kurz, N.; Kuti, I.; Lalkovski, S.; Lane, G. J.; Lee, E. J.; Lee, C. S.; Lotay, G.; Moon, C. B.; Nishizuka, I.; Niță, Cristina; Odahara, A.; Patel, Z.; Podolyák, Zs.; Roberts, O. J.; Sakuraï, H.; Schaffner, H.; Shand, C.; Suzuki, Hiroshi; Takeda, Hiroyuki; Terashima, S.; Vajta, Zs.; Valiente-Dobón, J.J.; Xu, Z. Y.

doi:10.1016/j.physletb.2016.09.058

Cited by 24 publications

(29 citation statements)

References 28 publications

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“…This position sensitive detector allowed direct correlations with individual implanted ions and also with subsequent β-decay events in the same location of the stopper arising from the same ion [1]. Discrete-energy gamma-ray decays emitted from the implaned ions (following either isomeric decay or β − decay) were measured using the Euroball RIKEN Cluster Array (EURICA) consisting of 84 coaxial high-purity germanium (HPGe) detectors, arranged in an array of 12 × 7 element CLUSTER detector modules, complemented by 18 additional LaBr 3 (Ce) detectors for fasttiming measurements [1,[7][8][9][10]. Related studies from the same experiment have been reported for isomeric and decay spectroscopy of 170 Dy and 172 Dy [1,10].…”

Section: Experimental Details Analysis and Resultsmentioning

confidence: 99%

“…The first was centred on the transmission of fully-stripped 170 Dy ions and ran for 13.5 hours of primary beam time [1] with a second setting focused on the transmission of 172 Dy [10] which ran for 45 hours of primary beam-time. Figure 1 shows the particle identification plot for the transmitted ions centred on the transmission of 172 Dy with the 166 Tb species clearly identified.…”

Section: Experimental Details Analysis and Resultsmentioning

confidence: 99%

“…The valence maximum nucleus 170 Dy 1 04 lies in the centre of the deformed region of prolate nuclear rotors [1]. The particular details of which nuclear orbitals lie close to the Fermi surface and how they influence the evolution of nuclear shapes can be studied by investigating the structure of odd-A and odd-odd nuclei close to the even-even valence maximum core.…”

Section: Introductionmentioning

confidence: 99%

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Isomer-delayed gamma-ray spectroscopy of neutron-rich ¹⁶⁶Tb

et al. 2017

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Abstract. This short paper presents the identification of a metastable, isomeric-state decay in the neutron-rich odd-odd, prolate-deformed nucleus 166 Tb. The nucleus of interest was formed using the in-flight fission of a 345 MeV per nucleon 238 U primary beam at the RIBF facility, RIKEN, Japan. Gamma-ray transitions decaying from the observed isomeric states in 166 Tb were identified using the EURICA gamma-ray spectrometer, positioned at the final focus of the BigRIPS fragments separator. The current work identifies a single discrete gamma-ray transition of energy 119 keV which de-excites an isomeric state in 166 Tb with a measured half-life of 3.5(4) µs. The multipolarity assignment for this transition is an electric dipole and is made on the basis internal conversion and decay lifetime arguments. Possible two quasi-particle Nilsson configurations for the initial and final states which are linked by this transition in 166

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Section: Experimental Details Analysis and Resultsmentioning

confidence: 99%

Section: Experimental Details Analysis and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Isomer-delayed gamma-ray spectroscopy of neutron-rich ¹⁶⁶Tb

et al. 2017

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“…The current work reports on data from two distinct magnetic rigidity (Bρ) settings: one centred on the transmission of 170 Dy ions, which ran for 13.5 hours [3]; and a second one centred on the transmission of 172 Dy [15] for 45 hours. The particle-identification (PID) plots for both settings are shown in figure 1.…”

Section: Experimental Details and Resultsmentioning

confidence: 99%

“…The terbium isotopes (Z = 65) correspond to a single proton-hole in the 170 Dy deformed core [3] and, therefore, their structure can be used to probe the evolution of competing, prolate-deformed single-particle structures in this region of the Segré chart. Prior to this work, 163 Tb was the heaviest isotope of this element for which excited state information had been reported [4] and the systematics of the lighter odd-A Tb isotopes 161,163 Tb are consistent with ground states built on the same [1,2,4,5].…”

Section: Introductionmentioning

confidence: 99%

Isomer Spectroscopy of Neutron-rich $^{165,167}$Tb

et al. 2017

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(601) 602 L.A. Gurgi et al.We present information on the excited states in the prolate-deformed, neutron-rich nuclei 165,167 Tb 100,102 . The nuclei of interest were synthesised following in-flight fission of a 345 MeV per nucleon 238 U primary beam on a 2 mm 9 Be target at the Radioactive Ion-Beam Factory (RIBF), RIKEN, Japan. The exotic nuclei were separated and identified event-by-event using the BigRIPS separator, with discrete energy gamma-ray decays from isomeric states with half-lives in the µs regime measured using the EURICA gamma-ray spectrometer.

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