I think the answer is no. You have to have a magnetic field to induce changes on a floppy (don't get them near a magnet). An x-ray would require a curved flow t

I think the answer is no. You have to have a magnetic field to induce changes on a floppy (don't get them near a magnet). An x-ray would require a curved flow to generate a magnetic field (think electromagnet) so the generally direct x-ray flux should be harmless. Of course the equipment and power requirements may make it difficult to avoid magnetic fields. Not an x-ray expert.