Revel, A., Marques, F. M., Sorlin, Olivier et al. (98 more authors) (2018) Strong neutron pairing in core+4n nuclei. Physical Review Letters. 152504. ISSN 1079-7114
Abstract
The emission of neutron pairs from the neutron-rich N=12 isotones C18 and O20 has been studied by high-energy nucleon knockout from N19 and O21 secondary beams, populating unbound states of the two isotones up to 15 MeV above their two-neutron emission thresholds. The analysis of triple fragment-n-n correlations shows that the decay N19(-1p)C18∗→C16+n+n is clearly dominated by direct pair emission. The two-neutron correlation strength, the largest ever observed, suggests the predominance of a C14 core surrounded by four valence neutrons arranged in strongly correlated pairs. On the other hand, a significant competition of a sequential branch is found in the decay O21(-1n)O20∗→O18+n+n, attributed to its formation through the knockout of a deeply bound neutron that breaks the O16 core and reduces the number of pairs.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 American Physical Society. This is an author-produced version of the published paper. 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) |
Depositing User: | Pure (York) |
Date Deposited: | 19 Apr 2018 16:10 |
Last Modified: | 30 Nov 2024 01:09 |
Published Version: | https://doi.org/10.1103/PhysRevLett.120.152504 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1103/PhysRevLett.120.152504 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:129888 |
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Filename: PhysRevLett.120.152504.pdf
Description: Strong Neutron Pairing in core + 4n Nuclei