Evidence of compound nucleus theory in the population of incompletely fused composite system 160Dy

• Published in: The European physical journal. A, Hadrons and nuclei Hadrons and nuclei, 2024-03, Vol.60 (3)
• Main Authors: Sharma, Nitin, Singh, Dharmendra, Mahato, Amritraj, Sahoo, Rajesh K., Chhura, Lupteindu, Giri, Pankaj K., Linda, Sneha B., Kumar, Harish, Tali, Suhail A., Ansari, M. Afzal, Ali, Rahbar, Kumar, Sushil, Ahmed, I., Yashraj, Kumar, R., Golda, K. S., Muralithar, S., Singh, R. P.
• Format: Article
• Language: English
• Subjects: Hadrons; Heavy Ions; Nuclear Fusion; Nuclear Physics; Particle and Nuclear Physics; Physics; Physics and Astronomy; Regular Article – Experimental Physics
• ISSN: 1434-601X
• DOI: 10.1140/epja/s10050-024-01293-8

The fusion excitation functions of evaporation residues, populated through complete fusion and/or incomplete fusion, were measured in the 18 O+ 146 Nd system at an incident beam energy of ≈   3–7 MeV/nucleon. These results were then compared with those obtained from the previously reported 16 O+ 148 Nd system. This comparison is particularly relevant since both systems lead to the population of the same compound nucleus, 164 Er*, in the case of complete fusion, and the same intermediate composite system, 160 Dy*, in the case of incomplete fusion. Significant enhancements in the measured excitation functions of evaporation residues populated via α -emitting channels indicate the population of such residues via incomplete fusion in addition to complete fusion. Further, a comparison of the measured data for 18 O+ 146 Nd and 16 O+ 148 Nd systems shows interesting results. The complete fusion and incomplete fusion cross-sections, reduced by three different procedures, are found to satisfactorily match each other, despite the major difference in the α - breakup threshold values of the projectiles 18 O (6.23 MeV) and 16 O (7.16 MeV). The effect of different α -breakup threshold values of the projectiles 18 O and 16 O was not observed in the comparison of incomplete fusion data for the systems 18 O+ 146 Nd and 16 O+ 148 Nd. This may be attributed to the fact that the residues populated in the exit channel are emitted from the same intermediate composite system 160 Dy* and also there is a high resemblance in the entrance channel mass asymmetry and other structural properties of these systems.