2024/09/22 by Priyanka, Amanjot, M Amanjot +16
Physics and Astronomy · #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-ex
paper · pdf · doi:10.48550/arxiv.2410.03691
openalex publication_date 2024/09/22 · openalex created_date 2024/10/10 · openalex updated_date 2026/07/29
The fusion cross-sections of 126Ba, 127,126,125Cs, 125,123,122Xe and 124,123I residues, populated via xn, pxn, αxn, and αpxn channels, have been measured in 12C+118Sn system at E_\textrmlab ≈ 65-85 MeV using offline γ-spectroscopy. To gain insights into the formation and decay modes of these residues, experimentally measured cross-sections have been analyzed using the statistical model codes PACE4 and EMPIRE. In the analysis, the cross-sections of pxn (127,126,125Cs), αxn (125Xe), and αpxn (123I) channels are substantially fed from their higher charge isobars via β+ decay and electron capture. The contribution of β+ decay and electron capture has been calculated using the prescription of Cavinato et al.\citecavinato1995study and the independent cross-sections of these residues have been compared with PACE4 and EMPIRE calculations, which fairly reproduce the independent cross-sections of evaporation-residue within the experimental uncertainties. Interestingly, it has been observed that the α-emitting channels, contrary to established findings in reactions involving α cluster projectiles (e.g., 12C, 16O, etc.) at the studied energy range, display negligible or no contribution of incomplete fusion (ICF) in 12C+118Sn system. The absence of ICF has been verified through a complementary experiment in which the forward recoil ranges of 126Ba(4n) and 125Xe(αn) channels have been measured. Present measurements reveal anomalous suppression of ICF in the 12C+118Sn system, providing new constraints on entrance-channel mass-asymmetry systematics absent in prior data.