The reactor at the Institut Laue Langevin (ILL) in Grenoble turns 40 years old

The reactor at the Institut Laue Langevin (ILL) in Grenoble turns 40 years old this winter, here is a great write up about one of first neutron experiments performed there by the person who performed the experiments at that time, read more: "Though our soap films were only a few molecules thick and invisible to the naked eye, we could still bounce neutrons off them with ease because we used heavy soap, where the hydrogen atoms had been replaced by the chunkier deuterium isotope.
I would sleep next to my experiment as multicoloured neutron detectors glided across marble tanzboden ('dance floors'), all to a background thrum of cooling pumps and fans. At different angles the number of neutrons reflected off the film gently rose and fell. These ripples revealed the thickness in the same way that a rainbow of colours reflect the different thicknesses of an oil slick on water.
In one fell swoop we had revealed the neutron's paradoxical character - a particle that behaves like a wave - and measured the thickness of a film one hundredth of a millionth of a metre across." : http://www.telegraph.co.uk/science/roger-highfield/8775120/The-physics-of-exotic-soap-bubbles.html