Isomeric yield ratios of photoneutron reactions on rubidium isotopes

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

“…However, the IR values of 87m,g Y from the nat Zr(c,pxn) reaction at the end-point bremsstrahlung energies of 45 and 55 MeV are the re-determined values and are found to be in agreement with the literature data [30]. The present results and literature data [1,5,8,[18][19][20][21][22][23][24][25][26][27][28][29][30] for the 87m,g Y and 86m,g Y isomeric pairs from the 89 Y(c,xn) reactions are shown in Figs. 3 and 4, respectively.…”

“…The measured values of IR together with the existing literature data [1,5,8,[18][19][20][21][22][23][24][25][26][27][28][29][30] are given in Table 2. The present results are the average values of isomeric yield ratios that calculated from different c-ray spectra.…”

“…(2) based on the measured activity of the meta-stable state by using the 587.8 keV photopeak and that of the ground state by using the 909.1 keV photopeak. The measured values of IR at the end-point bremsstrahlung energies of 45 and 55 MeV together with the available literature data [5,18,20,22,24,25,[27][28][29] are listed in Table 2 and also plotted in Fig. 5.…”

“…Luc et al measured the isomeric yield ratios of 89m,g Zr in the end-point bremsstrahlung energy of 15-20 MeV [25]. In the GDR region, the isomeric yield ratios of 87m,g Y and 89m,g Zr in the 89 Y(c,2n) and 90 Zr(c,n) reactions were determined by Thiep et al [26] and Bodrov et al [27], respectively. Bezshyyko et al [28] measured the isomeric yield ratios of 89 Zr in the 90,91 Zr(c,xnp) reactions at the end-point bremsstrahlung energy of 84 MeV.…”

Activation cross sections for the (γ,n) reactions on zirconium isotopes

“…There are many experiments to measure 90 Zr(c,n)89 m,gZr reaction around the GDR region to 43-MeV (Bodrov et al, 1994;Davydov et al, 1987;Palvanov and Razhabov, 1999;Kolev, 1998;Demekhina et al, 2002). The Giant Dipole Resonance.…”