First Measurement of Collectivity of Coexisting Shapes Based on Type II Shell Evolution: The Case of 
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Kremer, Christoph; Aslanidou, S.; Bassauer, S.; Hilcker, M.; Krugmann, A.; Neumann-Cosel, P. van; Otsuka, T.; Pietralla, N.; Ponomarev, V. Yu.; Shimizu, Noritaka; Singer, M.; Steinhilber, G.; Togashi, Tomoaki; Tsunoda, Y.; Werner, V.; Zweidinger, M.

doi:10.1103/physrevlett.117.172503

Cited by 110 publications

(97 citation statements)

References 22 publications

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“…The 40 Zr isotopes have been recently the subject of several experimental investigations [9][10][11][12][13][14][15] and theoretical studies, including mean-field based methods [16][17][18], the Monte-Carlo shell-model (MCSM) [19] and algebraic methods [8,20]. We adapt here the algebraic approach of the Interacting Boson Model (IBM) [21], with bosons representing valence nucleon pairs counted from the nearest closed shells.…”

Section: The Ibm With Configuration Mixing In the Zr Chainmentioning

confidence: 99%

Intertwined quantum phase transitions in the Zr isotopes

2019

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We present a detailed analysis of spectra and other observables for the entire chain of Zr isotopes, from neutron number 52 to 70, in the framework of the interacting boson model with configuration mixing. The results suggest a remarkable interplay of multiple quantum phase transitions (QPTs).One type of QPT involves an abrupt crossing of normal and intruder configurations, superimposed on a second type of QPT involving gradual shape-changes within each configuration.

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Section: The Ibm With Configuration Mixing In the Zr Chainmentioning

confidence: 99%

Intertwined quantum phase transitions in the Zr isotopes

2019

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“…The Zr isotopes have been recently the subject of several experimental investigations [12][13][14][15][16][17][18], opening the door for understanding the properties of both yrast and non-yrast states.…”

Section: Introductionmentioning

confidence: 99%

Interplay between shape-phase transitions and shape coexistence in the Zr isotopes

Gavrielov¹,

Leviatan²,

Iachello³

2019

Phys. Scr.

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We investigate the evolution of structure in the zirconium isotopes where one of the most complex situations encountered in nuclear physics occurs. We demonstrate the role of two concurrent types of quantum phase transitions, sharing a common critical point. The first type, involves an abrupt crossing of coexisting normal and intruder configurations. The second type, involves a gradual shapephase transition within the intruder configuration, changing from weakly-deformed to prolate-deformed and finally to gamma-unstable. Evidence for this scenario is provided by a detailed comparison with experimental data, using a definite algebraic framework.

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“…This phenomenon, widely studied in recent years (see Ref. [11] for a review), may help us to understand the microscopic mechanisms enhancing quantum many-body correlations in exotic nuclei [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous investigation of the T=1(Jπ=0+) and T=0(J

Morales¹,

Algora²,

Rubio³

et al. 2017

Phys. Rev. C

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Simultaneous investigation of the T = 1 (J π = 0 + ) and T = 0 (J π = 9 + ) β decays in The β decay of the odd-odd nucleus 70 Br has been investigated with the BigRIPS and EURICA setups at the Radioactive Ion Beam Factory (RIBF) of the RIKEN Nishina Center. The T = 0 (J π = 9 + ) and T = 1 (J π = 0 + ) isomers have both been produced in in-flight fragmentation of 78 Kr with ratios of 41.6(8)% and 58.4(8)%, respectively. A half-life of t 1/2 = 2157 +53 −49 ms has been measured for the J π = 9 + isomer from γ-ray time decay analysis. Based on this result, we provide a new value of the half-life for the J π = 0 + ground state of 70 Br, t 1/2 = 78.42 ± 0.51 ms, which is slightly more precise, and in excellent agreement, with the best measurement reported hitherto in the literature. For this decay, we provide the first estimate of the total branching fraction decaying through the 2 + 1 state in the daughter nucleus 70 Se, R(2 + 1 ) = 1.3 ± 1.1%. We also report four new low-intensity γ-ray transitions at 661, 1103, 1561, and 1749 keV following the β decay of the J π = 9 + isomer. Based on their coincidence relationships, we tentatively propose two new excited states at 3945 and 4752 keV in 70 Se with most probable spins and parities of J π = (6 + ) and (8 + ), respectively. The observed structure is interpreted with the help of shell-model calculations, which predict a complex interplay between oblate and prolate configurations at low excitation energies.

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First Measurement of Collectivity of Coexisting Shapes Based on Type II Shell Evolution: The Case of Zr96

Abstract: Background: Type II shell evolution has recently been identified as a microscopic cause for nuclear shape coexistence.

Cited by 110 publications

References 22 publications

Intertwined quantum phase transitions in the Zr isotopes

Intertwined quantum phase transitions in the Zr isotopes

Interplay between shape-phase transitions and shape coexistence in the Zr isotopes

Simultaneous investigation of the T=1(Jπ=0+) and T=0(J

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