Abstract
This paper report the summary of the experimental results of pre-scission neutron multiplicities from four compound nuclei, namely 210,212,214,216Rn, and statistical model analysis of the corresponding data. The compound nuclei 210,212,214,216Rn having N/Z values as 1.441, 1.465, 1.488, 1.511 respectively are populated through the 16,18O+194,198Pt reactions at excitation energies of 50, 61, 71.7 and 79 MeV. The measured neutron multiplicities are further analyzed with the statistical model of nuclear decay where fission hindrance due to nuclear dissipation is considered. The N/Z dependence of the dissipation strength at lowest excitation energy of the compound nuclei suggests shell closure effects. However, such effects are not observed at higher excitations where the variation of the dissipation strength with N/Z does not show any specific trend. The variation of N/Z in fission time scale is also shown.
Highlights
It is of considerable interest to explore the effect of N/Z in compound nuclei for a given element on the strength of nuclear dissipation
Measurement of pre-scission neutron multiplicities from an isotopic chain will be a suitable tool for the above purpose
Assuming that all available decay energy is removed by neutron and γ-ray emission, we can equate Mtot with x in the above energy balance equation to compare the experimental data consistency
Summary
EPJ Web of Conferences interesting questions in nuclear physics at low and intermediate energies. It is of considerable interest to explore the effect of N/Z in compound nuclei for a given element on the strength of nuclear dissipation. The compound nuclei 210,212,214,216Rn having N/Z values as 1.441, 1.465, 1.488, 1.511 respectively are populated through the 16,18O+194,198Pt reactions at a different set of excitation energies in the present work. The fragment-neutron correlation experiment for the reactions 16,18O+194,198Pt were carried out at 15UD Pelletron + LINAC and the National Array of Neutron Detectors (NAND) facility at Beam Hall-II of Inter University Accelerator Centre (IUAC), New Delhi. The details of the experiment and the analysis procedure can be found in reference [2,11]
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