Structure of 33Mg sheds new light on the N=20 island of inversion
Kanungo, R. and Nociforo, C. and Prochazka, A. and Utsuno, Y. and Aumann, T. and Boutin, D. and Cortina-Gil, D. and Davids, B. and Diakaki, M. and Far
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Abstract
The first reaction spectroscopy on the ground state structure of 33Mg through the measurement of the longitudinal momentum distribution from the one-neutron removal reaction using a C target at 898A MeV is reported. The experiment was performed at the FRS, GSI. The distribution has a relatively narrow width (150±3 MeV/c (FWHM)) and the one-neutron removal cross-section is 74±4 mb. An increased contribution from the 2p orbital is required to explain the observation showing its lowering compared to existing model predictions. This provides new information regarding the configuration of 33Mg and the island of inversion.
