Fig. 1. Photon energy spectrum of Tungsten target

Fig. 2. Photonuclear reaction cross-section of ¹⁰⁰Mo

Fig. 3. Cross-sections of ¹⁰⁰Mo, ⁹⁸Mo, ¹⁷⁶Lu and ⁸⁹Y

Fig. 4. Diagram of geometric modeling of ¹⁰⁰Mo neutron source

Fig. 5. Neutron flux on the surface of tungsten shell under various ¹⁰⁰Mo specifications

Fig. 6. Distribution of ⁹⁹Mo after 8 h irradiation

Fig. 7. Neutron energy spectrum on the surface of tungsten shell (target: R=0.3 cm, H=1.4 cm）

Fig. 8. Production of ⁹⁹Mo under different irradiation times

Fig. 9. Diagram of geometric model for photoneutron irradiation production

Fig. 10. Isotope activity changes with the thickness of the moderated layer

Fig. 11. Neutron energy spectrum of the interface between the moderated layer and oxide

Fig. 12. Isotope production under different irradiation times

Fig. 13. Activity changes of medical isotopes ¹⁷⁷Lu (a), ⁹⁹Mo (b), ⁹⁰Y (c) after irradiation