More about compound refractive #lenses for #X-rays.
on 02015-08-12Whoa, you can focus #X-rays up to 40 kEv with a series of concave #lenses made of aluminum or beryllium (negative refractive index!), like, say, a block of aluminum with a series of holes drilled in it, or a series of prisms (“saw-tooth lens”; not sure this isn’t just a Fresnel) of silicon, plastic, or lithium. If stimulated or induced gamma emission from metastable nuclear isomers (like they were trying to do with #hafnium) is possible at all, this might be the way to do it.
on 02015-08-12