Product yields for the photofission ofU235andU

Delayed neutron yields and spectra from photofission of actinides: data and calculations with Bremsstrahlung photons below 20 MeV

“…At this step, some experimental fission mass distributions are available to be compared to predicted ones. In figure 7, 235 U mass yields show a good agreement with Jacobs and Thierens data [11][12][13]. Similar quality is also obtained for 238 U, 237 Np and 239 Pu.…”

Mass distribution in the bremsstrahlung-induced fission of 232Th, 238U and 240Pu

“…However, the yield of fission products around mass numbers 133-135 is more pronounced compared to mass numbers 143-145, in both neutron- [28][29][30][31][32][33] and bremsstrahlung-induced [61][62][63][64][65][66][67][68][69][70][71][72][73][74] fission of uranium isotopes and heavier actinides. In the electromagnetic fission of lighter actinides [52][53][54], higher yields of fission products around mass numbers 133-135 corresponding to a most probable charge of 52 have been observed.…”

“…In the recent past, some data on the mass distribution of 232 Th [60], 235 U [74] and 238 U [73] have become available for bremsstrahlung energies at near barrier using off-line γ -ray spectrometric techniques. Some data on the bremsstrahlung-induced fission of 235,238 U in the energy range of 12-70 MeV were obtained using off-line γ -ray spectrometric techniques [68][69][70] and physical measurements [71,72]. On the other hand, the yield data on the fission products in the 12-30 MeV bremsstrahlung-induced fission of 240,242,244 Pu [75][76][77] are from physical measurements.…”

“…Similarly yields of fission fragments in the excitation energy range of the GDR region due to electromagnetic fission in inverse kinematics [52][53][54] are available for neutron-deficient lighter actinides such as 214-223 Ac, 220-229 Th, 224-232 Pa and 231-234 U. On the other hand, yields of fission products in the bremsstrahlung-induced fission of actinides are available in a broad energy range for a limited number of actinides including 232 Th [55][56][57][58][59][60], 235,238 U [61][62][63][64][65][66][67][68][69][70][71][72][73][74] and 240,242,244 Pu [75][76][77][78]. Most of the yield data on fission products available in the 9 MeV to several GeV bremsstrahlung-induced fission of 232 Th [55][56][57][58][59] and 235,238 U [61][62][63][64][65][66][67] are based on radiochemical separation and beta counting or γ -ray spectrometric techniques.…”

Measurement of isomeric yield ratios of 86m,g Y, 87m,g Y, and 89m,g Zr in the photonuclear reactions of 89 Y and nat Zr at the end-point bremsstrahlung energies of 45 and 55 MeV

“…6 as a function of excitation energy. The average excitation energy hE Ã E e i of the compound nucleus from the threshold E th to the end-point bremsstrahlung energy E e was obtained by using the following relation [36]:…”