Complete and incomplete fusion components from the nuclear reaction $\sp{16}$O + $\sp{nat}$Si were studied at 39.2, 59.0, 80.6, 96.4, 112.4, and 127.8 MeV bombarding energy. Inclusive measurements of evaporation residues (ERs) were made at all energies; ER/$\alpha$-particle coincidence measurements were made at 127.8 MeV. / Theoretical predictions of observable features of fusion and incomplete fusion reactions are discussed, for inclusive and coincidence measurements. / The design, construction, and calibration of a new time of flight (TOF) heavy ion spectrometer for the detection of ERs from this reaction is discussed. Incorporation of a silicon surface-barrier E-$\Delta$E $\alpha$-particle detector into the spectrometer for coincidence measurements is also discussed. / A model-independent method for extracting complete and incomplete momentum transfer components (CMT and ICMT) of the inclusive data, which are expected to correspond to complete and incomplete fusion (CF and ICF), is presented. A means of analysing coincidence data is discussed. / Results of the collection and analysis of both the inclusive and coincidence data are presented. From the inclusive data, the mass, velocity, and angular distributions of the ERs resulting from CMT processes were found in agreement with predictions for CF reactions. From the ERs resulting from ICMT processes, the velocity distributions were found to agree with a two-body projectile fragmentation model; net absorption of clusters of one, two, or three $\alpha$-particles seems to be the predominant process. In the coincidence data no clearly separable signature distinguishing CF and ICF reactions could be found, however fits to coincident $\alpha$-particle energy spectra indicate that the signature is there but masked by a large fusion-evaporation component. / Source: Dissertation Abstracts International, Volume: 51-12, Section: B, page: 5938. / Major Professor: Lawrence C. Dennis. / Thesis (Ph.D.)--The Florida State University, 1990.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_78392 |
| Contributors | Zingarelli, Robert Alan., Florida State University |
| Source Sets | Florida State University |
| Language | English |
| Detected Language | English |
| Type | Text |
| Format | 167 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
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