Isomeric ratios of the yields (cross sections) of photonuclear reactions

Isomeric Ratios of the Yields of (γ, n) Reactions on 85Rb and 87Rb Nuclei

“…1, which also shows the estimated measurement errors for the isomeric ratios for each maximum bremsstrahlung energy E γmax ; these errors are due to the statistical counts in the photopeaks and the errors in determining the detector efficiency. Our results agree, to within the measurement error, with the data of [6][7][8] and are somewhat less For 18 MeV (E γmax ≥ E m , where E m is the position of the maximum of the giant dipole resonance), the curve started to saturate, since a further increase of the level density, possibly, did not change appreciably the probability of formation of cascades resulting in metastable states.…”

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.…”

New measurements of 92Mo(γ, n) and (γ, 3n) reactions using laser-driven bremsstrahlung γ-ray

“…For 92 Mo(γ, n) 91 Mo reaction, 91 Mo can be formed with the isomeric state with a spin of 1/2 − or the ground state with a spin of 9/2 + . A lot of works had reported the cross sections [31][32][33] and IRs [31,[34][35][36][37][38][39] of 92 Mo(γ, n) 91m,g Mo reaction, but the experimental IRs did not match each other very well, especially at high energy region. In the giant dipole resonance (GDR) region, Thiep et al [39] and Davidov et al [37] had a maximum difference of 26%.…”