Abstract
Intermediate energy Coulomb excitation at 100 MeV/nucleon was used to probe the low-lying level structure of both [Formula Presented] and [Formula Presented] in the region between 1 and 8 MeV. Discrete [Formula Presented] states with energies of 5.35(10) and 6.85(5) MeV were observed in [Formula Presented] The strong direct excitation and subsequent [Formula Presented]-ray decay of these states, along with [Formula Presented] predictions for [Formula Presented] levels in this energy region, established their dipole character. The extracted [Formula Presented] values of [Formula Presented] and [Formula Presented] for the 5.35- and 6.85-MeV states, respectively, are significantly larger than shell model calculations, though modification of the single-particle energies, in particular, the [Formula Presented] shell gap, improves the agreement. The summed [Formula Presented] value for these levels (in Weisskopf units) is consistent with that for other nuclei that have been discussed recently in the literature as potential Pygmy dipole resonance hosts.
| Original language | English |
|---|---|
| Pages (from-to) | 14 |
| Number of pages | 1 |
| Journal | Physical Review C - Nuclear Physics |
| Volume | 67 |
| Issue number | 6 |
| DOIs | |
| State | Published - 2003 |
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