Neutron transmission measurements on hydrogen filled microspheres

Hollow microspheres are promising candidates for future hydrogen storage technologies. Although the
physical process for hydrogen diffusion through glass is well understood, measurements of static quantities
(e.q. hydrogen pressure inside the spheres) as well as dynamic properties (e.g. diffusion rate of
hydrogen through glass) are still difficult to handle due to the small size of the spheres (d ! 15 lm).
For diffusion rate measurements, the long-term stability of the experiment is also mandatory due to
the relatively slow diffusion rate. In this work, we present an accurate and long-term stable measurement
technique for static and dynamic properties, using neutron radiography. Furthermore, possible applications
for hydrogen filled microspheres within the scope of radiation issues are discussed.