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The decay pattern of the Pygmy Dipole Resonance of ¹⁴⁰Ce

Löher, Bastian ; Savran, Deniz ; Aumann, Thomas ; Beller, Jacob ; Bhike, Megha ; Cooper, Nathan L. ; Derya, Vera ; Duchêne, Marc ; Endres, Janis ; Hennig, Andreas ; Humby, P. ; Isaak, Johann ; Kelley, John H. ; Knörzer, M. ; Pietralla, Norbert A. ; Ponomarev, Vladimir ; Romig, Christopher ; Scheck, Marcus ; Scheit, Heiko ; Silva, Joel ; Tonchev, Anton P. ; Tornow, Werner ; Wamers, Felix ; Weller, Henry R. ; Werner, Volker ; Zilges, Andreas (2022):
The decay pattern of the Pygmy Dipole Resonance of ¹⁴⁰Ce. (Publisher's Version)
In: Physics Letters B, 756, pp. 72-76. Elsevier, ISSN 0370-2693, e-ISSN 1873-2445,
DOI: 10.26083/tuprints-00012672,
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Item Type: Article
Origin: Secondary publication
Status: Publisher's Version
Title: The decay pattern of the Pygmy Dipole Resonance of ¹⁴⁰Ce
Language: English
Abstract:

The decay properties of the Pygmy Dipole Resonance (PDR) have been investigated in the semi-magic N=82 nucleus ¹⁴⁰Ce using a novel combination of nuclear resonance fluorescence and γ–γcoincidence techniques. Branching ratios for transitions to low-lying excited states are determined in a direct and model-independent way both for individual excited states and for excitation energy intervals. Comparison of the experimental results to microscopic calculations in the quasi-particle phonon model exhibits an excellent agreement, supporting the observation that the Pygmy Dipole Resonance couples to the ground state as well as to low-lying excited states. A 10% mixing of the PDR and the [2+1×PDR]is extracted.

Journal or Publication Title: Physics Letters B
Journal volume: 756
Publisher: Elsevier
Classification DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
Divisions: 05 Department of Physics > Institute of Nuclear Physics
05 Department of Physics > Institute of Nuclear Physics > Experimentelle Kernphysik
05 Department of Physics > Institute of Nuclear Physics > Experimentelle Kernphysik > Experimental Nuclear Structure Physics with Exotic Ion Beams
Date Deposited: 09 Mar 2022 15:10
Last Modified: 10 Mar 2022 09:55
DOI: 10.26083/tuprints-00012672
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-126721
Additional Information:

Keywords: γ-ray spectroscopy; ¹⁴⁰Ce; Pygmy Dipole Resonance; Nuclear resonance fluorescence; Coincidence measurement; Quasi-particle phonon model

URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/12672
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