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7144418 
Journal Article 
Pre-saddle and pre-scission neutron emission rates in heavy-ion induced fission of O-16+Pb-208 and O-16+Bi-209 systems 
Soheyli, S; Khalili, MK; Ashrafi, G; , 
2019 
Yes 
International Journal of Modern Physics E
ISSN: 0218-3013 
WORLD SCIENTIFIC PUBL CO PTE LTD 
SINGAPORE 
WOS:000468822100004 
Whereas there is a slight information on the pre-saddle neutron emission rate and neutron multiplicity, as well as it is impossible to separate the pre-saddle and saddle to scission neutron contributions experimentally, the theoretical studies of pre-saddle neutron emission rate and neutron multiplicity are of great importance. In the present work, the calculations of pre-saddle neutron multiplicity are performed using the analysis of fission fragment angular anisotropy data for O-16 + Pb-208 and O-16 + Bi-209 reaction systems. The obtained results show that the pre-saddle neutron multiplicity decreases by increasing the initial excitation energy and it has found to be characterized by a nonlinear behavior. Through the analysis of pre-saddle neutron multiplicity and pre-saddle transition time by means of the neutron clock method, the pre-saddle neutron emission rate is calculated for the first time. The findings of this study show that the pre-scission neutron emission rate is lower than the pre-saddle neutron emission rate.