Full text
| |
| Author(s): |
Vinicius Antonio Bocaline Zagatto
Total Authors: 1
|
| Document type: | Doctoral Thesis |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto de Física (IF/SBI) |
| Defense date: | 2015-04-02 |
| Examining board members: |
Jose Roberto Brandao de Oliveira;
Andrés Arazi;
Luiz Carlos Chamon;
Paulo Roberto Silveira Gomes;
Rubens Lichtenthaler Filho
|
| Advisor: | Jose Roberto Brandao de Oliveira |
| Abstract | |
$\\gamma$-particle coincidence measurements of the $^7$Li$+^{120}$Sn reaction were made in the $2.6$ to $3.9$ MeV/nucleon energy range. Besides the inelastic channel, the proton {\\it pick-up} and one/two neutron {\\it stripping} were observed, whereas, for the last case, DWBA and CRC calculations were compared to experimental elastic scattering data and demonstrated that this transfer occurs in a sequential ({\\it two-step}) rather than a direct way. This work consolidates the existence of some channels that have already been observed (proton {\\it pick-up} and neutron {\\it stripping}) and also observes for the first time the existence of the two neutron {\\it stripping} channel, however, it still retains its pioneering as it is the first one to measure the angular distributions for all these channels. The proton {\\it pick-up} and the two neutron {\\it stripping} channels had to take into account in their analysis Monte Carlo calculations to simulate the projectile breaking effect ($^8$Be and $^5$Li, respectively). Spectroscopic factors for some states of these channels were found and are consistent with the expected values considering the {\\it single particle} model and the particle indistinguishability for the $^{119}$In and $^{122}$Sn cases, however, these factors are too small (magnitude order of $10^{-2}$) for the $^{121}$Sn case. This was generated most likely by the lack of coupling of some of the reaction channels that would reduce the one neutron transfer flux. Nuclei generated by the transfer followed by particle emission were also observed. (AU) | |
| FAPESP's process: | 11/11971-1 - Studies of nuclear reaction mechanisms in the system 7Li+120Sn using gamma-particle coincidence |
| Grantee: | Vinicius Antonio Bocaline Zagatto |
| Support Opportunities: | Scholarships in Brazil - Doctorate |