# Diving board proposal

Use a 2 MeV Xenon beam to irradiate a diving board that is machined out of 2 mm UO2 pins from INL.


1.) An arcticle that measured how the strength of UO2 changes with temperature and grain size. The strength and fracture of stoichiometric polycrystalline UO2 , A.G.EvansR.W.Davidge, Journal of Nuclear Materials Volume 33, Issue 3, December 1969, Pages 249-260

# In Situ material radiation damage measurement

Using a positron beam one can monitor the surface damage produced by an ion beam on a material.

Using photon induced positron annihilation you can adjust the penetration depth of the photon to scan the bulk material more. This would allow you to measure neutron damage as it occurs using MeV energy photons. By changing the energy of the photon you change the depth of the probes measurement.

# References

Use 2 MeV protons to irradiate zirconium to study the temperature dependence of the initial recombination. The incident proton causes surface damage on the zirconium during the ballistic phase knout out. Recombination occurs afterwards and can be temperature dependent.

2.6 MeV proton irradiation effects on the surface integrity of depleted UO2 (effects seen after 10^{17} protons/cm^2 ) https://www.sciencedirect.com/science/article/pii/S0168583X1301152X

article on silicon damage from ions

measuring ion damage to UO2 using Raman scattering

Appl. Phys. Lett. 100, 251914 (2012); https://doi.org/10.1063/1.4729588 File:Guijmbretiere APL 2012.pdf

#### Atom Probe Tomography

Atom Probe Tomography used to study Uranium oxide

Valderrama, B. et al. Investigation of material property influenced stoichiometric deviations as evidenced during UV laser-assisted atom probe tomography in fluorite oxides. Nucl. Instruments Methods Phys. Res. Sect. B Beam Interact. with Mater. Atoms 359, 107–114 (2015).