Structures in the heavy-ion fusion excitation function at and above the Coulomb barrier

Journal Article · 15 November 2023 · Physical Review. C

DOI: https://doi.org/10.1103/physrevc.108.l051604 · OSTI ID:2356840

Jiang, C. L. ^[1]; Henning, W. F. ^[1]; Kay, B. P. ^[1]; Watwood, N. ^[1]

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1. Argonne National Laboratory (ANL), Argonne, IL (United States)

Contrary to descriptions from coupled-channels or other model calculations, heavy-ion fusion excitation functions are not smooth near and above the Coulomb barrier. There appear to be weak but noticeable oscillations or structures within the excitation functions that can be observed clearly in representation $d (σ E)/d E$ and in the comparison with theoretical calculations $$σ (E) – σ_{th}(E)$$. Importantly, a rather similar phenomenon has been studied before and can be explained in light symmetric systems as the influence of the centrifugal barrier penetration only on even angular momentum, but it cannot be extended to heavier, more asymmetric fusion systems. A more thorough investigation may be required to investigate this newly indicated behavior.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• Grant/Contract Number: AC02-06CH11357
• OSTI ID: 2356840
• Journal Information: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 5 Vol. 108; ISSN 2469-9985
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English