Investigating entrance channel effect through the measurement of neutron multiplicity in mass region a ≈200
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Date
2026
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Abstract
In this study, we measured both the pre-scission and post-scission neutron multiplicities for the
31P + 170Er reaction at excitation energies in the range of 62-84 MeV, using the National Array of
Neutron Detectors (NAND) at Inter University Accelerator Centre (IUAC), New Delhi. Theoretical
calculations to reproduce the measured neutron multiplicities have been performed using the
dynamical model code VECLAN. These calculations show that the dissipation strength parameter
(𝛽) increases with excitation energy. Dynamical model calculations also have been performed
using HICOL code to understand the fusion dynamics and formation time. It has been observed
that transitioning from an asymmetric to a symmetric entrance channel leads to a gradual increase
in the compoun