Abstract
The spectrum and angular distribution of alpha particles scattered by 27 Al at 22.2 MeV bombarding energy have been measured. Among the prominent peaks in the spectrum, those corresponding to excited states at 5.434, 6.547, 7.28 and 7.50 MeV were studied by measuring the gamma ray spectrum in coincidence with scattered alpha particle. From the measured gamma ray branching ratios, (5/2, 7/2, 9/2) + was assigned to the former two levels and 7/2 - was assigned to the latter two levels. In addition, from gamma ray transition rate consideration, 3/2 - , 9/2 + and (3/2, 5/2) + were found appropriate for 4.055, 4.508 and 5.491 MeV level respectively.
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