from where we can obtain x-ray source?

Hali,
Practically from an X-ray tube ...
Did you checkd it, & other "Similar topics" pls: www.edaboard.com/ftopic82983.html
K.

Added after 45 minutes:

www.empf.org/empfasis/june05/phoenix0605.htm
http://www.globalsources.com/manufac...y-Machine.html
www.powersourcing.com/sg/xrayscanner.htm
http://www.comet.ch/files/webcontent...rial_x-ray.pdf
www.xintek.com/products/xray/index.htm
http://www.x-rayequipment.com/kevex-...hodium-target/
Than; as you know too, are Siemens, Philips & Varian the garanted producer for that subject...