X-ray to Microwave fluorescence

[TESL@]

Hello,

Is there any specific element that would absorb x-ray and emit radiation roughly in microwave band (not thermal radiation, fluorescence). Or could it be achieved by mixtures and gradual wavelength increase?

Thank you.

 

[e.bar.goum]

Microwaves are probably way too low in energy. 100 GHz ~ 3 mm ~ 0.4meV. Loosely, the energy of flourescence is given by the band gap in the scintillating material.

Most scintillators operate in the visible to UV range, because that's about the size of the bandgaps.

For a good overview on the mechanisms of fluorescence, read:

http://neutron.physics.ucsb.edu/docs/scintillation_presentation_info.pdf

 

[TESL@]

Thank you e.bar.goum.