Selective population of highly excited states in ('26)Al and ('27)Al has been observed in the ('16)O(('12)C,d) and ('16)O(('12)C,p) reactions at 17.3 MeV center of mass energy. Particle-gamma angular correlation measurements have been performed simultaneously for both reactions. The outgoing particles were detected at 0(DEGREES) with respect to the beam direction in coincidence with gamma rays detected by three Ge(Li) detectors located at five angles. In addition, proton-gamma coincidence measurements have been performed at 32.0 MeV laboratory energy where the population of the 12.0 MeV state of ('27)Al is significantly enhanced. The selectively populated states in ('26)Al and ('27)Al are expected to have high spin values based on simple grazing angular momentum arguments. The lifetimes and decay modes of these highly excited states in the ('26)Al and ('27)Al nuclei were studied. / Lifetimes were extracted from as many transitions as possible using the Doppler Shift Attenuation technique for the gamma-emitting states of ('26)Al. The coincidence data were analyzed for transitions from states up to 7.0 MeV. Branching ratios and mixing ratios were obtained for four highly excited states in ('26)Al. Spin and parity assignments were also made for these highly excited states. The results have been combined to produce the transition strengths and the reduced transition probabilities. Reduced transition probabilities and energy levels obtained were compared to shell model predictions. A new member of the K('(pi)) = 0('+) rotational band in ('26)Al is suggested here. / Lifetimes were also extracted from transitions evolving from the observed highly excited states of ('27)Al lying between 7.0 MeV and approximately 12.0 MeV. Branching ratios were determined for these states. The lifetimes and branching ratios allow spin limits to be placed on four highly excited states of ('27)Al. The fourth member of the K('(pi)) = 9/2('+) rotational band in ('27)Al is suggested. / Source: Dissertation Abstracts International, Volume: 44-07, Section: B, page: 2187. / Thesis (Ph.D.)--The Florida State University, 1983.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_75157 |
| Contributors | SAW, CHENG BEE., Florida State University |
| Source Sets | Florida State University |
| Detected Language | English |
| Type | Text |
| Format | 200 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
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