Cederwall, B., Liu, X., Aktas, O. et al. (67 more authors) (2020) Isospin Properties of Nuclear Pair Correlations from the Level Structure of the Self-Conjugate Nucleus Ru 88. Physical Review Letters. 062501. ISSN 1079-7114
Abstract
The low-lying energy spectrum of the extremely neutron-deficient self-conjugate (N=Z) nuclide Ru448844 has been measured using the combination of the Advanced Gamma Tracking Array (AGATA) spectrometer, the NEDA and Neutron Wall neutron detector arrays, and the DIAMANT charged particle detector array. Excited states in Ru88 were populated via the Fe54(Ar36,2nγ)Ru88∗ fusion-evaporation reaction at the Grand Accélérateur National d'Ions Lourds (GANIL) accelerator complex. The observed γ-ray cascade is assigned to Ru88 using clean prompt γ-γ-2-neutron coincidences in anticoincidence with the detection of charged particles, confirming and extending the previously assigned sequence of low-lying excited states. It is consistent with a moderately deformed rotating system exhibiting a band crossing at a rotational frequency that is significantly higher than standard theoretical predictions with isovector pairing, as well as observations in neighboring N>Z nuclides. The direct observation of such a "delayed" rotational alignment in a deformed N=Z nucleus is in agreement with theoretical predictions related to the presence of strong isoscalar neutron-proton pair correlations.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Funding Information: | Funder Grant number SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC) ST/L005727/1 SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC) ST/P003885/1 |
Depositing User: | Pure (York) |
Date Deposited: | 16 Mar 2020 09:20 |
Last Modified: | 21 Jan 2025 17:46 |
Published Version: | https://doi.org/10.1103/PhysRevLett.124.062501 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1103/PhysRevLett.124.062501 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:158467 |