Yields of photonuclear reactions for photon-activation analysis with high-energy bremsstrahlung

Photonuclear Studies for the Isomeric Yield Ratios in the Production ofnatFe(γ,xnp)52m,gMn with 50-,60-, and 70-MeV Bremsstrahlung

“…The yield ratios of 52m,g Mn have been measured from photonuclear reactions are induced by the bremsstrahlung beams of end point energy of 50-, 60-, and 70-MeV. The measured values of isomeric yield ratio together with previous works found in the literature [16,[21][22][23][24] for wide energy range are summarized in Table 4. The total uncertainty in Table 4 consists of the uncertainties related to the IR measurement and the systematic uncertainties, which is summarized in Table 5.…”

“…The development of high quality nuclear data for iron is practically important mainly due to iron's role as an important structural material in accelerator and ADSS reactor designs. There are number of investigations of isomeric yield ratio of 52m,g Mn production by many authors [16,[21][22][23][24] using photonuclear reactions. The yield ratio of this isomer is measured by Kato et al [21] at 30-MeV bremsstrahlung energy, W.B.…”

“…There are number of investigations of isomeric yield ratio of 52m,g Mn production by many authors [16,[21][22][23][24] using photonuclear reactions. The yield ratio of this isomer is measured by Kato et al [21] at 30-MeV bremsstrahlung energy, W.B. Walters et al [16] in the wide range of bremsstrahlung energy 100-to 250-MeV, Henry et al [22] at 70-MeV bremsstrahlung, Van Do et al [23] at 65-MeV bremsstrahlung, and by Kumbartzki et al [24] at 1500-MeV bremsstrahlung.…”

High energy photon activation

“…Photon flux density at a given energy is dependent upon the mean current of the primary beam. In a linear accelerator mean currents are relatively large, typically 5-15 J..LA, although they can be as high as 100 11A 39 or even high er in some newer machines. The maximum energy of photans obtained from a linear accelerator is given by the length of the accelerating tube which is basically a waveguide in which the electrons are accelerated by the progressing electromagnetic waves (Fi~]ure I a).…”

Measurement of isomeric yield ratios in the photo-production of 133m,g;137m,g Ce from nat Ce using 55-, 60-, and 65-MeV bremsstrahlung

“…However, the cross-sections and the isomeric yield ratios in the photon-induced reactions above 35 MeV are very limited [27][28][29][30][31][32][33][34]. There is a cross section ratio measurement for the In the present work, the isomeric yield ratios for nat Ce(c,xn) 133m,g Ce and nat Ce(c,xn) 137m,g Ce reactions were measured at the end-point bremsstrahlung energies of 55-, 60-, 65-MeV by using the activation and the off-line c-ray spectrometric technique.…”