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Signatures for a nuclear quantum phase transition from E0 and E2 observables in Gd isotopes

Wiederhold, J. ; Kern, R. ; Lizarazo, C. ; Pietralla, N. ; Werner, V. ; Jolos, R.V. ; Bucurescu, D. ; Florea, N. ; Ghita, D. ; Glodariu, T. ; Lica, R. ; Marginean, N. ; Marginean, R. ; Mihai, C. ; Mihai, R. ; Mitu, I.O. ; Negret, A. ; Nita, C. ; Olacel, A. ; Pascu, S. ; Stroe, L. ; Toma, S. ; Turturica, A. (2024)
Signatures for a nuclear quantum phase transition from E0 and E2 observables in Gd isotopes.
In: Journal of Physics: Conference Series, 2018, 1023
doi: 10.26083/tuprints-00021056
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Signatures for a nuclear quantum phase transition from E0 and E2 observables in Gd isotopes
Language: English
Date: 28 May 2024
Place of Publication: Darmstadt
Year of primary publication: 2018
Place of primary publication: Bristol
Publisher: IOP Publishing
Journal or Publication Title: Journal of Physics: Conference Series
Volume of the journal: 1023
Collation: 7 Seiten
DOI: 10.26083/tuprints-00021056
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

Nuclei are complex quantum objects due to complex nucleon-nucleon interactions. They can undergo rather rapid changes in structure as a function of nucleon number. A well known region of such a shape transition is the rare-earth region around N = 90, where accessible nuclei range from spherical nuclei at the closed neutron shell at N = 82 to deformed nuclei. For a better understanding of this phenomenon, it is of interest to study empirical signatures like the E2 transition strength B(E2;2₁⁺→0₁⁺) or the E0 excitation strength ρ²(E0;0₁⁺→0₂⁺). The nuclide ¹⁵²Gd with 88 neutrons is located close to the quantum phase transition at N = 90. The lifetime τ(0₂⁺) of ¹⁵²Gd has been measured using fast electronic scintillation timing (FEST) with an array of HPGe- and LaBr₃- detectors. Excited states of ¹⁵²Gd were populated via an (α,n)-reaction on a gold-backed ¹⁴⁹Sm target. The measured lifetime of τ(0₂⁺)=96(6)ps corresponds to a reduced transition strength of B(E2;0₂⁺→2₁⁺)=111(7) W.u. and an E0 transition strength of ρ²(E0) = 39(3) · 10⁻³ to the ground state. This result provides experimental support for the validity of a correlation between E0 and E2 strengths that is a novel indicator for a quantum phase transition. This work was published as J. Wiederhold et al., Phys. Rev. C 94, 044302 (2016).

Identification Number: Artikel-ID: 012024
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-210568
Additional Information:

XXII International School on Nuclear Physics, Neutron Physics and Applications 10–16 September 2017, Varna, Bulgaria

Classification DDC: 500 Science and mathematics > 530 Physics
Divisions: 05 Department of Physics > Institute of Nuclear Physics
Date Deposited: 28 May 2024 09:58
Last Modified: 14 Aug 2024 05:59
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21056
PPN: 520609905
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