Miss Perfect Posted March 23, 2009 Share Posted March 23, 2009 What are the interactions of x-ray of angstroms wavelength with matter? Link to comment Share on other sites More sharing options...
Klaynos Posted March 23, 2009 Share Posted March 23, 2009 The first thing you need to do is consider what energy the x-rays have, and then what that energy could relate to in different materials... 1 Link to comment Share on other sites More sharing options...
Miss Perfect Posted March 24, 2009 Author Share Posted March 24, 2009 The photon energy related to an angstrom wavelength is in ev range . I guess the dominant interaction in that area must be photoelectric, eh? Or is that thmson and reily scattering? Link to comment Share on other sites More sharing options...
Kaeroll Posted March 24, 2009 Share Posted March 24, 2009 I'm no physicist but x-rays can interact with electrons via diffraction. Handy for resolving crystal structures. Link to comment Share on other sites More sharing options...
swansont Posted March 24, 2009 Share Posted March 24, 2009 The photon energy related to an angstrom wavelength is in ev range . I guess the dominant interaction in that area must be photoelectric, eh? Or is that thmson and reily scattering? hc = 1240 eV nm, so the energy is going to be tens of keV. Photoelectric effect and Compton scattering. 1 Link to comment Share on other sites More sharing options...
Miss Perfect Posted March 24, 2009 Author Share Posted March 24, 2009 Thank you! Link to comment Share on other sites More sharing options...
morganparkar Posted March 25, 2009 Share Posted March 25, 2009 Hi Friend, one of several possible interactions that can occur between the atoms of an object and an incident X-ray. The interactions nearly all consist of interactions with the electron cloud around the atom. At the energies used in diagnostic imaging, only two types of interactions occur, scattering or absorption. In absorption, all of the X-ray energy is taken up by the atom and is transferred to an electron, which is ejected from the atom. Thanks Link to comment Share on other sites More sharing options...
swansont Posted March 25, 2009 Share Posted March 25, 2009 Hi Friend, one of several possible interactions that can occur between the atoms of an object and an incident X-ray. The interactions nearly all consist of interactions with the electron cloud around the atom. At the energies used in diagnostic imaging, only two types of interactions occur, scattering or absorption. In absorption, all of the X-ray energy is taken up by the atom and is transferred to an electron, which is ejected from the atom. Thanks That describes Compton Scattering and the Photoelectric effect. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now