Quantum numbers of26Al levels above 6 MeV excitation energy
- 21 Downloads
Measurements of resonance strengths and ofγ-ray angular distributions or anisotropies have been performed on selected resonances of the25Mg(p, γ) reaction in the rangeE p=2–4 MeV,E x=8.2−10.1 MeV with an emphasis on high-spin andT=1 analog resonances. EightT=1 states are identified, among them high-spin states at 8747 keV (I=6), 9286 KeV (I=5), and 9986 keV (I π = 7+, 6+). Shell model calculations in thes-d basis space reproduce the branching ratios of these states and clarify the nature of final states. New high-spinT=0 states are observed at 9720 keV (I π = 7+), 8602 keV (I = 6), and 6695 keV (I π = 7+). TheI π assignments to severalE x = 6–8 MeV states are revised and the role of two-particle excitations into thef-p shell is elucidated. A revised spectrum of 73 positive-parity,T = 0 states is compared to the predictions of shell-model calculations in thes-d basis space using the universals-d shell Hamiltonian.
PACS27.30 + t 21.10 Hw 21.60 Cs
Unable to display preview. Download preview PDF.