https://doi.org/10.1140/epja/s10050-023-01168-4
Regular Article - Theoretical Physics
Examining the influence of phonon coupling and nucleon transfer channels in reactions 
S + 
Ni, 
S + 
Pd and 
Ca + 
Zr around Coulomb barrier energies
Department of Physics, Deenbandhu Chhotu Ram University of Science and Technology, 131039, Murthal, Haryana, India
b panghal005@gmail.com, pardeep.phy@dcustm.org
Received:
1
August
2023
Accepted:
14
October
2023
Published online:
26
October
2023
In this work the fusion excitation functions of reactions S + Ni, S + Pd and Ca + Zr have been computed within the coupled channel approach using code CCFULL with an aim to investigate the effect of coupling of positive Q value nucleon (neutron and proton) transfer channels in conjunction with coupling of various low-lying excited states of fusing nuclei. Fusion barrier distribution (BD) function has also been exploited to investigate the effects that arise due to consideration of structural difference of various projectiles along with coupling of different channels. Due to inclusion of neutron transfer channel an additional enhancement in sub-barrier fusion cross sections has been observed for systems S+Ni while no effect of coupling of neutron transfer channel has been noticed for 
S+Pd reaction despite of having positive Q value for neutron transfer. Coupling of proton transfer channels contributed significantly towards reproduction of fusion data for systems 
S+Ni and 
Ca+Zr when the value of 
is positive for proton pickup channel however coupling of proton transfer channel contributed negligibly for systems S+Pd and 
Ca+Zr wherein -value 
for proton stripping channel. It has been found that for S+Pd system, the effect of coupling of low-lying excited states is clearly visible and dominating over the contribution of coupling of nucleon transfer channels.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. 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.
