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Breakdown of the Z=8 shell closure in unbound 12O and its mirror symmetry

 

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Opened Access Breakdown of the Z=8 shell closure in unbound 12O and its mirror symmetry
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Author: Mukha, I.
Suzuki, D.
Iwasaki, H.
Beaumel, D.
Nalpas, L.
Pollacco, E.
Assié, M.
Blumenfeld, Y.
Department: Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Date: 2009-10-09
Published in: Physical Review Letters, 103 (15), 152503-1-152503-4.
Document type: Article
Abstract: An excited state in the proton-rich unbound nucleus 12O was identified at 1.8(4) MeV via missing-mass spectroscopy with the 14O(p,t) reaction at 51  AMeV. The spin-parity of the state was determined to be 0+ or 2+ by comparing the measured differential cross sections with distorted-wave calculations. The lowered location of the excited state in 12O indicates the breakdown of the major shell closure at Z=8 near the proton drip line. This demonstrates the persistence of mirror symmetry in the disappearance of the magic number 8 between 12O and its mirror partner 12Be.
Cite: Mukha, I., Suzuki, D., Iwasaki, H., Beaumel, D., Nalpas, L., Pollacco, E.,...,Blumenfeld, Y. (2009). Breakdown of the Z=8 shell closure in unbound 12O and its mirror symmetry. Physical Review Letters, 103 (15), 152503-1-152503-4.
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URI: http://hdl.handle.net/11441/62597

DOI: 10.1103/PhysRevLett.103.152503

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