Al27(d,3He)26Mg reaction at 29 MeV

The [sup 27]Al([ital d],[sup 3]He)[sup 26]Mg reaction has been investigated at 29 MeV incident energy. Observations using a split-pole magnetic spectrograph have been made of 65 levels of [sup 26]Mg in the range of excitation energy between 0 and 9.7 MeV. These levels can be identified with the known states of [sup 26]Mg, which by other techniques have been assigned excitation energies with precisions of 3 keV or better. Information about the orbital angular momentum (with associated conclusions about [ital J] and [pi]) and the single-nucleon spectroscopic factors of about 40 of these [sup 26]Mg levels have been obtained through distorted-wave Born approximation (DWBA) analyses of measured angular distributions. Eight levels which are populated through the pickup of a [ital l][sub [ital p]]=1 proton have been observed at [ital E][sub [ital x]]=6.878, 7.694, 7.824, 8.050, 8.902, 9.042, 9.239, and 9.618 MeV. The two most strongly excited of these levels ([ital E][sub [ital x]]=7.824 and 9.042 MeV) were attributed in a previous study of the same reaction to the population of 1[ital p] hole states. The observed angular distributions of two [ital J][sup [pi]]=6[sup +] levels are reproduced with [ital l][sub [ital p]]=4 DWBA calculations which assume [ital g] components inmore » the ground state of [sup 27]Al. The excitation energies and spectroscopic factors for positive parity states are compared with the results of a recent, complete [ital sd]-shell space, shell-model calculation. New spectroscopic information is extracted from this comparison and from the comparison of the present results with previous knowledge.« less