Spectroscopy and lifetime measurements near the proton drip line: P26,27,28
| Autor: | D. Weisshaar, Alexandra Gade, P. C. Bender, P. D. Cottle, E. Lunderberg, D. Bazin, M. Bowry, S. J. Williams, M. Spieker, B. A. Brown, Brandon Elman, A. Magilligan, Brenden Longfellow |
|---|---|
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Physical Review C. 99 |
| ISSN: | 2469-9993 2469-9985 |
| DOI: | 10.1103/physrevc.99.064330 |
| Popis: | We report on the observation of excited states in the neutron-deficient phosphorus isotopes $^{26,27,28}\mathrm{P}$ via in-beam $\ensuremath{\gamma}$-ray spectroscopy with both high-efficiency and high-resolution detector arrays. In $^{26}\mathrm{P}$, a previously unobserved level has been identified at 244(3) keV, two new measurements of the astrophysically important $3/{2}^{+}$ resonance in $^{27}\mathrm{P}$ have been performed, $\ensuremath{\gamma}$ decays have been assigned to the proton-unbound levels at 2216 and 2483 keV in $^{28}\mathrm{P}$, and the $\ensuremath{\gamma}$-ray line-shape method has been used to make the first determination of the lifetimes of the two lowest-lying excited states in $^{28}\mathrm{P}$. The expected Thomas-Ehrman shifts were calculated and applied to levels in the mirror nuclei. The resulting level energies from this procedure were then compared with the energies of known states in $^{26,27,28}\mathrm{P}$. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|