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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
Artikel, Zweitveröffentlichung, Verlagsversion

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Kurzbeschreibung (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).

Typ des Eintrags: Artikel
Erschienen: 2024
Autor(en): 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.
Art des Eintrags: Zweitveröffentlichung
Titel: Signatures for a nuclear quantum phase transition from E0 and E2 observables in Gd isotopes
Sprache: Englisch
Publikationsjahr: 28 Mai 2024
Ort: Darmstadt
Publikationsdatum der Erstveröffentlichung: 2018
Ort der Erstveröffentlichung: Bristol
Verlag: IOP Publishing
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Journal of Physics: Conference Series
Jahrgang/Volume einer Zeitschrift: 1023
Kollation: 7 Seiten
DOI: 10.26083/tuprints-00021056
URL / URN: https://tuprints.ulb.tu-darmstadt.de/21056
Zugehörige Links:
Herkunft: Zweitveröffentlichung DeepGreen
Kurzbeschreibung (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).

ID-Nummer: Artikel-ID: 012024
Status: Verlagsversion
URN: urn:nbn:de:tuda-tuprints-210568
Zusätzliche Informationen:

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

Sachgruppe der Dewey Dezimalklassifikatin (DDC): 500 Naturwissenschaften und Mathematik > 530 Physik
Fachbereich(e)/-gebiet(e): 05 Fachbereich Physik
05 Fachbereich Physik > Institut für Kernphysik
Hinterlegungsdatum: 28 Mai 2024 09:58
Letzte Änderung: 20 Jun 2024 11:51
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