1. Role of the target orientation angle and orbital angular momentum in the evaporation residue production
- Author
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Fazio, Giovanni, Giardina, Giorgio, Hanappe, Francis, Mandaglio, Giuseppe, Manganaro, Marina, Muminov, Akhtam I., Nasirov, Avazbek K., and Sacca, Carmelo
- Subjects
Nuclear Theory - Abstract
The influence of the orientation angles of the target nucleus symmetry axis relative to the beam direction on the production of the evaporation residues is investigated for the $^{48}$Ca+$^{154}$Sm reaction as a function of the beam energy. At low energies ($E_{\rm c.m.}<$137 MeV), the yield of evaporation residues is observed only for collisions with small orientation angles ($\alpha_T<45^0$). At large energies (about $E_{\rm c.m.}=$140--180 MeV) all the orientation angles $\alpha_T$ can contribute to the evaporation residue cross section $\sigma_{ER}$ in the 10--100 mb range, and at $E_{c.m.}>$180 MeV $\sigma_{ER}$ ranges around 0.1--10 mb because the fission barrier for a compound nucleus decreases by increasing its excitation energy and angular momentum., Comment: 20 pages, 10 figures, submitted to JPSJ
- Published
- 2008
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