Barrier distributions from {sup 32}S+{sup 90,96}Zr quasi-elastic scattering: Investigation of the role of neutron transfer in sub-barrier fusion reactions

Journal Article · Tue Jan 15 00:00:00 EST 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.77.014601· OSTI ID:21068051

Yang, F; Lin, C J; Wu, X K; Zhang, H Q; Zhang, C L; Zhou, P; Liu, Z H ^[1]

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1. China Institute of Atomic Energy, P. O. Box 275, Beijing 102413 (China)

The differential cross sections of quasi-elastic scattering at backward angles were measured with high precision for {sup 32}S+{sup 90,96}Zr around the Coulomb barrier, and barrier distributions were extracted from the measured excitation functions. The experimental barrier distribution of {sup 32}S+{sup 90}Zr is well reproduced by the coupled-channels calculations including the low-lying quadruple and octupole vibrations in {sup 32}S and {sup 90}Zr. However, the model with the same coupling scheme fails to reproduce the experimental barrier distribution for {sup 32}S+{sup 96}Zr. The coupled-channels calculation including the neutron transfer channels in the system {sup 32}S+{sup 96}Zr gives an improved description of the experimental data. A comparison of the data on {sup 40}Ca+{sup 90,96}Zr shows that the two systems {sup 32}S, {sup 40}Ca+{sup 90}Zr display barrier distributions that are similar to each other, whereas the barrier distributions of {sup 32}S, {sup 40}Ca+{sup 96}Zr are both wider and flatter than the those of {sup 40}Ca+{sup 90,96}Zr. The present results strongly indicate that neutron transfer plays an important role in the fusion processes.

• OSTI ID: 21068051
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 77, Issue 1; Other Information: DOI: 10.1103/PhysRevC.77.014601; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALCIUM 40
CALCIUM 40 REACTIONS
COMPARATIVE EVALUATIONS
COULOMB FIELD
COUPLED CHANNEL THEORY
COUPLING
DISTRIBUTION
ENERGY-LEVEL TRANSITIONS
EXCITATION FUNCTIONS
NEUTRON TRANSFER
OCTUPOLES
PICKUP REACTIONS
QUASI-ELASTIC SCATTERING
SULFUR 32 REACTIONS
THERMONUCLEAR REACTIONS
ZIRCONIUM 90
ZIRCONIUM 90 TARGET
ZIRCONIUM 96
ZIRCONIUM 96 TARGET