Advertisement

Charge distribution studies in the fast-neutron-induced fission of 232Th, 238U, 240Pu and 244Cm

  • H. Naik
  • R.J. Singh
  • R.H. Iyer

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( σZA), the most probable charge/mass ( ZP/AP), 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.

PACS. 25.85.Ec Neutron-induced fission 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Società Italiana di Fisica and Springer-Verlag 2003

Authors and Affiliations

  • H. Naik
    • 1
  • R.J. Singh
    • 1
  • R.H. Iyer
    • 1
  1. 1.Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400 085, IndiaIN

Personalised recommendations