https://doi.org/10.1140/epja/s10050-024-01293-8
Regular Article – Experimental Physics
Evidence of compound nucleus theory in the population of incompletely fused composite system 
Dy*
1
Department of Physics, Central University of Jharkhand, 835222, Ranchi, Jharkhand, India
2
Department of Physics, Aligarh Muslim University, 202002, Aligarh, Uttar Pradesh, India
3
Department of Physics, G.F. College, 242001, Shahjahanpur, Uttar Pradesh, India
4
Inter University Accelerator Centre, Aruna Asaf Ali Marg, 110067, New Delhi, India
Received:
7
December
2023
Accepted:
4
March
2024
Published online:
25
March
2024
The fusion excitation functions of evaporation residues, populated through complete fusion and/or incomplete fusion, were measured in the 
O+
Nd system at an incident beam energy of 
3–7 MeV/nucleon. These results were then compared with those obtained from the previously reported 
O+
Nd system. This comparison is particularly relevant since both systems lead to the population of the same compound nucleus, 
Er*, in the case of complete fusion, and the same intermediate composite system, Dy*, in the case of incomplete fusion. Significant enhancements in the measured excitation functions of evaporation residues populated via 
-emitting channels indicate the population of such residues via incomplete fusion in addition to complete fusion. Further, a comparison of the measured data for O+Nd and O+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 
- breakup threshold values of the projectiles O (6.23 MeV) and O (7.16 MeV). The effect of different -breakup threshold values of the projectiles O and O was not observed in the comparison of incomplete fusion data for the systems O+Nd and O+Nd. This may be attributed to the fact that the residues populated in the exit channel are emitted from the same intermediate composite system Dy* and also there is a high resemblance in the entrance channel mass asymmetry and other structural properties of these systems.
Copyright comment Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
