Reaction mechanisms involving weakly bound {sup 6}Li and {sup 209}Bi at energies near the Coulomb barrier

Journal Article · Tue Mar 15 04:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.034616· OSTI ID:21499510

Santra, S; Kailas, S; Ramachandran, K; Parkar, V V; Jha, V; Roy, B J; Shukla, P ^[1]

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1. Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085 (India)

The elastic, inelastic, and transfer cross sections are measured for the {sup 6}Li+{sup 209}Bi reaction at energies around the Coulomb barrier. The optical model analysis of elastic scattering shows a breakup threshold anomaly in the energy dependence of the real and imaginary potentials. The observed energy dependence is found to be consistent with the dynamic polarization potential obtained from the coupled-channels calculations that explain the above measured reaction channels simultaneously. A comparison of different reaction probabilities reveals that the relative contribution of breakup starts increasing at energies below the Coulomb barrier, in contrast to the behavior of other reaction channels, which get closed as energy is lowered. The large probability of projectile breakup at sub-Coulomb energies leads to the observation of a nonzero imaginary potential even at E{sub lab}{<=}0.8V{sub B}.

• OSTI ID: 21499510
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 83; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BISMUTH 209 TARGET
COMPARATIVE EVALUATIONS
COULOMB ENERGY
COULOMB FIELD
COUPLED CHANNEL THEORY
CROSS SECTIONS
DIRECT REACTIONS
ELASTIC SCATTERING
ELECTRIC FIELDS
ENERGY
ENERGY DEPENDENCE
EVALUATION
HEAVY ION REACTIONS
INELASTIC SCATTERING
KINETICS
LITHIUM 6 REACTIONS
MATHEMATICAL MODELS
NUCLEAR REACTIONS
OPTICAL MODELS
POLARIZATION
PROBABILITY
REACTION KINETICS
SCATTERING
TARGETS
TRANSFER REACTIONS