Abstract:
Charge distribution studies for heavy-mass fission products were carried out in the fast-neutron-induced fission of 232Th, 238U, 240Pu and 244Cm using radiochemical and gamma-ray spectrometric techniques. The width parameter( σZ/σA), the most probable charge/mass ( Z P/A P), the charge polarization (ΔZ) and the slope of charge polarization [ δ(ΔZ)/δA ′] as a function of the fragment mass (A ′) were deduced. The average charge dispersion parameter ( 〈σZ〉) and proton odd-even effect ( δp) were also obtained for these fissioning systems. The 〈σZ〉 and δp values in the fissioning systems 241Pu * and 245Cm * were determined for the first time. The δ(ΔZ)/δA ′ value is also determined for the first time in the fissioning systems 239U * , 241Pu * and 245Cm * . These data along with the literature data for even-Z fissioning systems such as 230Th * , 232Th * , 233U * , 234U * , 236U * , 238U * , 239Pu * , 240Pu*, 242Pu * , 246Cm * , 250Cf * and 252Cf(SF) are discussed in terms of nuclear structure effect and dynamics of descent from the saddle to the scission point. The role of the excitation energy in low-energy fission is also discussed.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received: 26 July 2002 / Accepted: 3 December 2002 / Published online: 3 April 2003
RID="a"
ID="a"Present address: Emeritus Scientist (CSIR) Bhabha Atomic Research Centre, Nuclear Recycle Group, WIP Building, Trombay, Mumbai-400085, India; e-mail: rhiyer@magnum. barc.ernet.in
Communicated by D. Schwalm
Rights and permissions
About this article
Cite this article
Naik, H., Singh, R. & Iyer, R. Charge distribution studies in the fast-neutron-induced fission of 232Th, 238U, 240Pu and 244Cm. Eur Phys J A 16, 495–507 (2003). https://doi.org/10.1140/epja/i2002-10122-9
Issue Date:
DOI: https://doi.org/10.1140/epja/i2002-10122-9