Structure of 70Fe : Single-particle and collective degrees of freedom
Abstract
Excited states in the neutron-rich 70Fe nucleus were populated in a one-proton removal reaction from 71Co projectiles at 87 MeV/nucleon. A new transition was observed with the γ -ray tracking array GRETINA and shown to feed the previously assigned 41+ state. In comparison to reaction theory calculations with shell-model spectroscopic factors, it is argued that the new γ ray possibly originates from the 61+ state. It is further shown that the Doppler-reconstructed γ -ray spectra are sensitive to the very different lifetimes of the 2+ and 4+ states, enabling their approximate measurement. The emerging structure of 70Fe is discussed in comparison to LNPS-new large-scale shell-model calculations.
- Publication:
-
Physical Review C
- Pub Date:
- January 2019
- DOI:
- 10.1103/PhysRevC.99.011301
- arXiv:
- arXiv:1812.03342
- Bibcode:
- 2019PhRvC..99a1301G
- Keywords:
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- Nuclear Experiment
- E-Print:
- accepted for publication as PRC rapid communication