Coupled reaction channel analysis of elastic, inelastic, transfer, and fusion cross sections for C-12+Pb-208 - art. no. 024602

Citation
S. Santra et al., Coupled reaction channel analysis of elastic, inelastic, transfer, and fusion cross sections for C-12+Pb-208 - art. no. 024602, PHYS REV C, 6402(2), 2001, pp. 4602
Citations number
30
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW C
ISSN journal
0556-2813 → ACNP
Volume
6402
Issue
2
Year of publication
2001
Database
ISI
SICI code
0556-2813(200108)6402:2<4602:CRCAOE>2.0.ZU;2-V
Abstract
Elastic, inelastic, and transfer angular distributions were measured for C- 12 + Pb-208 in the energy range from 58.9 to 84.9 MeV. While the fission fr agment angular distributions were measured over the energy range from 58.9 to 79 MeV. the residue cross sections after 2n evaporation from the compoun d nucleus (Ra-220) were measured by alpha counting at 58.9, 60.9. and 62.9 MeV. Combining the above data with the ones from the literature. the fusion cross sections have been obtained. Quasielastic excitation function at 170 degrees was also measured to obtain the fusion barrier distribution. Optic al model analysis of the elastic scattering data, using both phenomenologic al and microscopic models. brought out the pronounced energy dependence of the optical potential at near barrier energies. A simultaneous description of the elastic and all the nonelastic channels was obtained from the couple d reaction channel (CRC) calculations using a consistent set of parameters at all the energies. The effective nucleus-nucleus real potential, obtained from CRC calculations, explained the observed energy dependence of the rea l part of the optical potential. Thus. the real potential used in these cal culations with such a large number of constraints can be considered as the bare nucleus-nucleus potential.