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Intruder dominance in the 0⁺₂ state of ³²Mg studied with a novel technique for in-flight decays

Elder, R., Iwasaki, H., Ash, J., Bazin, D., Bender, P. C., Braunroth, T., Brown, B. A., Campbell, C. M., Crawford, H. L., Elman, B. , Gade, A., Grinder, M., Kobayashi, N., Longfellow, B., Macchiavelli, A. O., Mijatović, T., Pereira, J., Revel, A., Rhodes, D., Tostevin, J. A. and Weisshaar, D. (2019) Intruder dominance in the 0⁺₂ state of ³²Mg studied with a novel technique for in-flight decays Physical Review C, 100 (4), 041301(R). 041301-1.

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Abstract

The development of advanced γ-ray tracking arrays allows for a sensitive new technique to investigate elusive states of exotic nuclei with fast rare-isotope beams. By taking advantage of the excellent energy and position resolution of the Gamma-Ray Energy Tracking In-beam Nuclear Array, we developed a novel technique to identify in-flight isomeric decays of the 0⁺₂ state in 32Mg populated in a two-proton removal reaction. We confirm the 0⁺₂→2+1γ-ray transition of ³²Mg and constrain the 0⁺₂ decay lifetime, suggesting a large collectivity. The small partial cross section populating the 0⁺₂ state in this reaction provides experimental evidence for the reduced occupancy of the normal configuration of the 0⁺₂ state, indicating the intruder dominance of this state.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
Elder, R.
Iwasaki, H.
Ash, J.
Bazin, D.
Bender, P. C.
Braunroth, T.
Brown, B. A.
Campbell, C. M.
Crawford, H. L.
Elman, B.
Gade, A.
Grinder, M.
Kobayashi, N.
Longfellow, B.
Macchiavelli, A. O.
Mijatović, T.
Pereira, J.
Revel, A.
Rhodes, D.
Tostevin, J. A.J.Tostevin@surrey.ac.uk
Weisshaar, D.
Date : 4 October 2019
Funders : Science and Technology Facilities Council (STFC)
DOI : 10.1103/PhysRevC.100.041301
Copyright Disclaimer : © 2019 American Physical Society.
Depositing User : Clive Harris
Date Deposited : 07 Oct 2019 08:25
Last Modified : 29 Oct 2019 14:28
URI: http://epubs.surrey.ac.uk/id/eprint/852882

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