Fission-fragment energy correlation measurements for 252Cf(sf) and structures in far-out asymmetric fission

Examination of evidence for collinear cluster tri-partition

“…The shoulder in the mass-yields around the mass number ~70 was also observed in experiments with a twin ionization chamber, and 2E method was applied for calculation of the fragment mass of binary fission. The yield of 72 Ni was approximately 10 -5 per binary fission, and its energy was about 104 MeV [26,27]. The yields of the same order were observed for Ni isotopes in far asymmetric neutron induced fission of 236 U [58].…”

Investigations on Fission of Compound Nuclei with Z=120

“…In case of spontaneous fission, the existence of spherical and deformed shells for certain neutron and proton numbers in the emerging binary fragments significantly increases the likelihood that these neutrons and protons may break into pieces [5]. Barreau et al [6] experimentally observed spontaneous fission of 252 Cf. [7] systematically studied -decay and spontaneous fission half-lives in the atomic number range Z ≥ 90 .…”

Kinetic energy distribution for neutron-induced fission of neptunium isotopes

“…On the other hand, the determination of kinetic energy leads to a better understanding of the fission process, of reprocessing methods for spent nuclear fuel, and of the odd-even effect. However, the kinetic energy of neptunium isotopes has been measured in only a few works [16][17][18] and there are limited experimental data available on the <TKE> distributions (the mean total kinetic energy as a function of fission fragments) for actinide fission [19][20][21][22][23][24][25][26][27][28][29][30]. It therefore seems necessary to explore the <TKE> values of neptunium isotopes.…”