Number of electron hole pairs generated from an x-ray

I have an X-ray that generates photons with energy $10$ keV and this beam is incident on an are $0.5$ µm $times$ $0.5$ µm. The material is found to have a quantum efficiency of $70$% (that is $70$% of photons interact with the material). From this information, is it possible to determine the amount of photons incident on my material per second. Or am I missing certain information such as the intensity of the x-ray beam?