Measurement of the neutron capture cross-section of 238U at neutron energies of 5.9±0.5 and 15.5±0.7MeV by using the neutron activation technique

Accurate U238 ( n, 2n ) UKrishichayan1, Bhike2, Tornow3 et al. 2017Phys. Rev. C6020View full textAdd to dashboardCite

“…Similar to the approach by Mather et al, Frehaut et al [15] used a large gadolinium-loaded liquid scintillator to determine the 238 U(n,2n) 237 U cross section. In recent years, Naik and his group [23][24][25][26] used the activation technique for the cross-section measurements at E n = 8.0, 10.0, 12.0, 14.8, and 15.5 MeV. Our present data are in good agreement with the values reported by Knight et al [6] and Raics [16].…”

Cross-sections of the 238U (n, γ) 239U reaction in the 3.0–7.0 MeV energy region measured by relative activation method*

“…The model structure and parameters are taken from the RIPL library [39]. It can calculate the nuclear reactions of a variety of incident particles (n, p, t, 3 He, γ, α) with an energy between 0-200 MeV for a target nucleus mass number from 12 to 339. Moreover, it is available with a variety of required information including all crosssections and each reaction channel cross-section as well as angular distributions and double differential cross-sections of the emitted particles.…”

“…The experiment was performed on a 3 MV tandem accelerator at the Sichuan University. The monoenergetic neutrons were derived from the D (d, n) 3 He reaction, whereby the D-beam stream generated by the 3 MV tandem accelerator was used to bombard the solid titanium deuteride (D-Ti) target. Mo was used as the substrate and was covered with a Ti film to adsorb D nuclei.…”

“…Moreover, fast breeder reactors (FBRs) are based on the 238 U- 239 Pu fuel cycle, in which the fertile isotope 238 U is used as the breeder material to regenerate the fissile nuclide 239 Pu. The radionuclide 239 Pu is produced by the 238 U (n, γ) reaction and two consecutive beta decays of 239 U [3,4]. The yield of 239 Pu relies on the 238 U (n, γ) 239 U reaction cross-section, resulting in the requirement to determine the precise reaction cross-sectional values of 238 U (n, γ) 239 U to anticipate the dynamical behaviors of complicated arrangements and security [4,5].…”