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How to make X-Ray visible

  1. May 20, 2005 #1
    Hey!
    Of course you can help me! :) I need some information about HOW TO MAKE X-RAY VISIBLE. I know that it depends on the atomic number, but I need it more specific, do you know where I can get some information about my problem?
    I don't want you to write an essay for me, but I really need some help, where I can find some useful texts!
    Thank you very much :)
     
  2. jcsd
  3. May 20, 2005 #2
    er..what????

    What do X-rays have to do with atomic numbers???

    Could you be a bit clearer in your meaning?
     
  4. May 20, 2005 #3

    SpaceTiger

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    One way is with a scintillator. Here's an interesting thread on the subject.
     
  5. May 20, 2005 #4

    Doc Al

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    Fluoroscopy

    Not sure what you're looking for, but do a Google on "Fluoroscopy". You'll find plenty of info on that technique which allows one to view x-rays by having them hit a fluorescent screen.
     
  6. May 20, 2005 #5

    brewnog

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    Another way is by letting the X-rays fall onto a photosensitive film, before developing and fixing the film. This is how medical X-rays are taken.
     
  7. May 20, 2005 #6

    GENIERE

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    You can accelerate away from the x-ray source. At some appreciable fraction of C, the X-rays will begin to be visible to the unaided eye.

    ...
     
  8. May 21, 2005 #7
    wow, thank you very much for so many replies!!
    know i've got enough to read ;)

    some more questions i've got, which need to be explained in a very easy way:
    - How can you "create" x-rays?
    - and what can you do with it...

    it would be great if i get as much replies as yesterday :)
    thanks a lot!!
     
  9. May 21, 2005 #8

    brewnog

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    Here's a lovely simple website which tells you 2 ways of making X-rays, in an extremely simple way! I'm sure someone will expand on this if it's too simplistic for you.

    Anyway, on to uses. As you probably know, a common use for X-rays is in medicine, especially when diagnosing broken and fractured bones. The X-rays penetrate right through the softer tissue, but are partially blocked by denser tissue, so leave a 'shadow', which is recorded on photographic film.

    A very similar technique can be used in industry to detect faults in welds on pressure vessels like aeroplanes and pipelines.
     
  10. May 21, 2005 #9
    hey!
    thank you very much!! this website is great!!
     
  11. May 21, 2005 #10

    What a great method!!!
     
  12. May 21, 2005 #11
    I actually do this for a living! We have X-Ray tubes, internal "crawling" tubes although I normally use Gamma sources such as Ir92, and Co60...just depends on the "quality" of the radiation suitable for the job.

    99% of the time we use film from Kodak,Fuji etc etc. but as mentioned there is flouroscopy for real-time viewing. There are also some fluorescing salt screens, but I have'nt had any exposure to them. Once again, it all depends on the sensitivity,contrast etc. required when you choose your medium.
     
  13. May 23, 2005 #12
    It's me again :smile:
    I've got another question to the x-rays:

    Why do we see something on a screen or an a picture or ... if the doctor x-rays e.g. my hand? Is there a more scientific answer than that the x-ray gets absorbed by my bones and there the picture stays white?

    Thanks for your effort!! :smile:
     
  14. May 23, 2005 #13

    pervect

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    I was just reading that they were recoverign the text of some old documents by irradiating them with x-rays. The ink used for the original set of documents would flouresce because it contained iron. I don't know the specific wavelength or any of the details.

    These are the sole surviving copies of some of Archimedes work. Google could probably find more info.
     
  15. May 23, 2005 #14

    brewnog

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    Not really! Think of it as a shadow. The softer, more fleshy parts of your body allow more X-rays through, while your hard bones (and things like cartiledge and tumours) are denser, so let fewer X-rays penetrate. The areas on the photographic film which are more heavily exposed to X-rays turn black when developed.

    This is the basic idea of it. If you want more scientific stuff, try researching X-ray absorption spectra of the human body.
     
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