X-Ray Optics Calculator

Refractive Index Decrement

   Photon energy, 0.01 - 10000 keVfrom: to: step:
   Wavelength λ, Å
   Characteristic line
Material Name
Chemical Formula
Choose Material Type
     Henke data set Chantler data set
   Delta δ    
   Beta β    
   Total linear attenuation coefficient μ, μm-1    
   Linear attenuation coefficient (photoelectric part), μm-1    
   Linear attenuation coefficient (Compton scattering part), μm-1    
   Linear attenuation coefficient (Rayleigh scattering part), μm-1    
   β' = λμ/4π    
   π - shift length, μm    
   Indexes ratio δ/(2πβ)    
   Indexes ratio χ = β / δ    
   Critical angle for total external reflection (2δ)1/2, rad    
   Brewster angle, rad
   Maximum possible gain 4πδ/(λμ)    
   Diffraction-limited focus size λ/(2δ)1/2, μm    
   Effective aperture of parabolic profile with focus distance F = 1 m, μm    
   Zone plate 1-st order efficiency [1 + exp(-χπ)]2/ π2

   



Serguei Kuznetsov , IMT RAS, Chernogolovka, Russia.