Abstract
A new resonance having a relative decay energy of MeV has been observed above the two-neutron separation energy in at an excitation energy of MeV. The new level was found to directly feed the first excited state in , an -MeV resonance, through the measurement of neutron-neutron correlations. Energy level comparisons with suggest that this new level in is dominated by an unpaired neutron in the single-particle orbital coupled to a single hole in the single-particle orbital. Establishment of this two-neutron discrimination technique provides a means for investigating high-lying excited states in neutron-rich nuclei.
- Received 28 October 2010
DOI:https://doi.org/10.1103/PhysRevC.83.031303
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