Abstract
The first lifetime measurement used to study the magnetic response of halo nuclei is presented. The lifetime of the first excited state of the one-neutron halo nucleus has been measured by two complementary Doppler-shift techniques with the Gamma-Ray Energy Tracking In-beam Nuclear Array (GRETINA). The ) strength of 3.21(25) determined for this decay represents a strongly hindered transition among light nuclei. Shell-model calculations predict a strong hindrance due to the near-degeneracy of the and orbitals among neutron-rich carbon isotopes, while tensor corrections and loosely bound effects are necessary to account for the remaining strength.
- Received 27 August 2014
- Revised 27 February 2015
DOI:https://doi.org/10.1103/PhysRevC.91.041303
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