Abstract
In the fusion-evaporation reaction at beam energy, excited states have been observed for the first time in the isotope . The experimental setup comprised the Ge array CLARION, a recoil mass spectrometer and, in its focal plane, an ionization chamber. Five transitions in are identified, out of which a cascade of three transitions has been established by means of recoil- coincidences. The strong transitions at in and in are viewed as the “mirror” ground-state transitions. The rather large energy difference of is suggested to arise from Coulomb monopole contributions. Shell-model calculations support this interpretation.
- Received 6 September 2004
DOI:https://doi.org/10.1103/PhysRevC.71.011303
©2005 American Physical Society