Spectroscopy of 36Mg: interplay of normal and intruder configurations at the neutron-rich boundary of the "island of inversion" |
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| Authors: | Gade A Adrich P Bazin D Bowen M D Brown B A Campbell C M Cook J M Ettenauer S Glasmacher T Kemper K W McDaniel S Obertelli A Otsuka T Ratkiewicz A Siwek K Terry J R Tostevin J A Utsuno Y Weisshaar D |
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| Institution: | National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA. |
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| Abstract: | We report on the first spectroscopy study of the very neutron-rich nucleus (36)(12)Mg24 using the direct two-proton knockout reaction 9Be(38Si,36Mg+gamma)X at 83 MeV/nucleon. The energy of the first excited 2+ state of 36Mg, E(2+(1)=660(6) keV, was measured. The magnitude of the partial cross sections to the ground state and the 2+(1) state is indicative of strong intruder admixtures in the lowest-lying states as suggested by Monte Carlo shell-model calculations. |
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