Measurement of flux-weighted average cross sections of $$^{\mathrm {{nat}}}\hbox {In}(\upgamma ,\hbox {xn})$$ nat In ( γ , xn ) reactions and isomeric yield ratios of $$^{{112\mathrm {mg},111\mathrm {m},\mathrm {g},110\mathrm {m},\mathrm {g}}}$$ 112 mg , 111 m , g , 110 m , g In with bremsstrahlung

The flux-weighted average cross sections of $$^{\mathrm {nat}}\hbox {In}(\upgamma ,x\hbox {n}$$ ) reactions and isomeric yield ratios of $$^{112\mathrm {m,g}}\hbox {In}$$ , $$^{111\mathrm {m,g}}\hbox {In}$$ , and $$^{110\mathrm {m,g}}\hbox {In}$$ were measured with the bremsstrahlung end-point energies of 50, 60, and 70 MeV using an activation and off-line $$\upgamma $$ -ray spectrometric technique at the Pohang Accelerator Laboratory (PAL), Korea. It was observed that the average cross sections of the $$^{\mathrm {nat}}\hbox {In}(\upgamma ,\hbox {xn})$$ reactions increase with bremsstrahlung energy up to the Gaint Dipole Resonance (GDR) region. Thereafter, it shows a small decrease trend with bremsstrahlung energy due to the opening of another reaction channel. The isomeric yield ratios of same product in the $$(\upgamma ,\hbox {n})$$ , (n,2n), (p,x), ( $$\upalpha ,\hbox {x})$$ , and $$(^{{3}}\hbox {He},\hbox {x})$$ reactions for various targets show that the spin of the target nucleus plays a vital role besides the effect of excitation energy and input angular momentum in determining the isomeric yield ratios.