Multi-intruder structures in P
Bender, P. C.*; Tabor, S. L.*; Tripathi, V.*; Hoffman, C. R.*; Hamilton, L.*; Volya, A.*; Clark, R. M.*; Fallon, P.*; Macchiavelli, A. O.*; Paschalis, S.*; Petri, M.*; Carpenter, M. P.*; Janssens, R. V. F.*; Lauritsen, T.*; McCutchan, E. A.*; Seweryniak, D.*; Zhu, S.*; Chiara, C. J.*; Chen, X.*; Reviol, W.*; Sarantites, D. G.*; Toh, Yosuke
The available experimental information on P has been greatly increased through the analysis of decays in coincidence with protons from the interaction of an O beam at 24 MeV with an O target. Light charged particles from the reaction were detected with Microball, and multiple ray coincidences with Gammasphere. Many newly observed transitions have been identified and placed in the level scheme. Additionally, for most states, spins have been assigned based on measured ray angular distributions while parities were inferred from lifetimes determined through Doppler-broadened line-shape analysis. Most of the states observed have been interpreted in terms of shell-model calculations using the WBP-a and SDPF-NR interactions having one particle in the 0 or 1 orbital. The two calculations agree almost equally well with the data resulting in root-mean-square differences of about 200 keV. However, two of a few high-lying states may be associated with stretched states, but the calculations over-predict their energies by 2-3 MeV. Furthermore, a newly observed long-lived 7919-keV state is established for which no explanation is available at present.