Mass distribution and the total fission cross section in the fission of 238U with protons of energies ranging between 13 and 55 MeV

Comparison of yields of neutron-rich nuclei in proton- and photon-induced U238 fission

“…However, for photofission, the cross section maximizes in the GDR range for mean photon energy of 13.7 MeV. In Fig.4 σ f (E p ) vs proton energy has been plotted using PACE4 [17] and TALYS [16] along with our empirical formalism to compare with experimental data [22,23]. In an attempt to make a comparison of proton induced fission with photofission, the choice of energy of the incident particle (proton/photon) is made such that the fission cross-section is maximized.…”

Nuclear charge distribution in the region of symmetric fission of 238U by protons of energy 20–85 MeV

“…The independent yield data shown in Table 4 were converted into fractional chain yields using the cumulative yield data shown in Table 6 and data reported by Baba, Umezawa and Baba (42), Miller (43), Hicks and Gilbert (41), Stevenson et al (44), and Lindner and Osborne (45). The fractional chain yield data shown in Table 7 were used to construct charge dispersion curves.…”

Independent isotopic yields in 25 MeV and 50 MeV proton-induced fission of natU

“…However, the data cannot distinguish at which stage the neutrons were emitted: during the formation of the compound nucleus, during the decay of the compound nucleus (the exci- [48,6,7,5,49]. The agreement between the mass yields is poor.…”

“…in ref. [5]) measure the chain yields, fission experiments in scattering chambers [6,7] where the mass determination takes place in hundreds of nanoseconds, measure the mass yields.…”