Isomer ratios for products of photonuclear reactions with middle-weight nuclei

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 isomeric yield ratios of 89m,g Zr from the nat Zr(c,xn) 89m,g Zr reaction of present work and literature data [5,18,20,22,24,25,[27][28][29] are shown in Table 2 and plotted in Fig. 5.…”

“…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.…”

“…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. Rahman et al [29] measured the isomeric yield ratios of 89m,g Zr from the 90 Zr(c,n) reaction, 86m,g Y from the nat Zr(c,pxn) reaction and 87m,g,86m,g Y from the 89 Y(c,xn) reaction at the end-point bremsstrahlung energies of the 50, 60, and 70 MeV.…”