München 2006 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 17: Kernphysik/Spektroskopie
HK 17.2: Vortrag
Dienstag, 21. März 2006, 14:15–14:30, C
Octupole-deformed molecular configurations in 21Ne∗ — •Carl Wheldon, Tzany Kokalova, and Severin Thummerer — SF7, Hahn-Meitner-Institut, Glienicker Straße 100, D-14109 Berlin, Germany
Structures exhibited by many light nuclei can be described by underlying tightly bound cores, clustered together into molecular-like systems. Neon-21 is particularly good for investigating this phenomenon because, although three of the four (16O+n+α) cluster bands are far from yrast, the bandheads all lie under 3.7 MeV, well below the particle thresholds.
Here we report new results for 21Ne using the incomplete-fusion reaction 16O(7Li, n p)21Ne at 29.4 MeV with GASP+ISIS, following the population of cluster states up to 12 MeV and the observation of both intra- and inter-band transitions. These results lead to a re-interpretation of some levels in the Kπ=3/2− and 1/2− bands [1]. The implications of this re-ordering on the octupole doublet bands are examined. The data also allow a more accurate determination of some previously uncertain level energies. The ‘missing’ Iπ=5/2− level is also discussed.
[1] C. Wheldon, Tz. Kokalova, et al., accepted for publication in Eur. Phys. J. A. ∗ Supported by the Alexander von Humboldt Foundation.