Bound states of 27Al studied at selected 26Mg(p, γ)27Al resonances

Measurements of the γ-ray dacay and angular distributions at eight low-energy (Esub(p) < 1 MeV) 26Mg(p, γ)27Al resonances lead to the spin and parity assignments Jsup(π) = (3/2)+, (1/2)-, (3/2)-, (5/2)+, 5/2, (3/2)-, (3/2)-, (9/2)- and (7/2) for the bound states at Esub(x) = 3.96, 4.05, 5.16, 5.25, 5.44, 6.16, 6.99, 7.23 and 7.48 MeV, respectively. For other levels, spin and parity limitations are set. Also reported are precise excitation energies, branching and mixing ratios, and lifetime limits. For the resonances additional information is given on energies, strengths and widths. The reaction Q-value is Q = 8271.0 +- 0.5 keV. The level scheme of 27Al, complemented with these new data, is compared with the results from recent shell-model calculations. (Auth.)