A method for distinguishing complete momentum transfer reactions from other types of reaction mechanisms is discussed. The nuclear reactions used to perform this study were $\sp{12}$C($\sp{12}$C,HI) at E$\sb{\rm cm}$ = 31.5, 21.75, and 12 MeV and $\sp{10}$B($\sp{12}$C,HI) and $\sp{12}$C($\sp{10}$B,HI) at E$\sb{\rm cm}$ = 28.64, 19.77, and 10.91 MeV. These data were measured with high precision at three laboratory angles, typically 8$\sp\circ$, 16$\sp\circ$, and 25$\sp\circ$ and with lesser precision at several other angles using a time of flight (TOF) system. The TOF system utilized a microchannel plate detector along with a silicon surface barrier detector 270 cm downstream to obtain time information. By using this arrangement, very low energy heavy residues could be measured (down to 3-4 MeV). / In order to distinguish the complete momentum transfer reactions from the other reaction mechanisms, transformations into the center of mass frame were made. By examining the symmetry of the center of mass velocity distributions obtained (assuming a symmetric center of mass angular distribution), information on the reaction process could be made evident. Specifically, for complete momentum transfer reactions, it is expected that the heavy residues will display a symmetry about 90$\sp\circ$ in the center of mass and thus have symmetric center of mass velocity and angular distributions. For other reaction mechanisms this would not be the case unless the entrance channel used were symmetric. In the case of a symmetric entrance channel this symmetry would be manifested regardless of reaction mechanism. The $\sp{12}$C + $\sp{12}$C thus allowed us to test the degree of symmetry one would achieve under ideal circumstances for this type of data and analysis. / A statistical model analysis is also performed and then compared to the data. Most of the data is shown to be due to a complete momentum transfer process and good agreement between the statistical model predictions and the data is realized. / Source: Dissertation Abstracts International, Volume: 50-02, Section: B, page: 0608. / Major Professor: Lawrence C. Dennis. / Thesis (Ph.D.)--The Florida State University, 1988.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_77949 |
| Contributors | Sartor, Kenneth., Florida State University |
| Source Sets | Florida State University |
| Language | English |
| Detected Language | English |
| Type | Text |
| Format | 174 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
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