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CHAPTER 4: Generation of X-rays (Production of X-rays: (X-ray spectrum…
CHAPTER 4: Generation of X-rays
Discuss:
(i) electron at cathode
(ii) electron collide at anode
(iii)X-ray at Cu
Component of X-ray tube:
-
evacuated glass tube, filament & an anode
-
filament (tungsten) (high heat resistance)
-
target, Cu is most used
Production of X-rays:
Actual design of X-ray tube
1.
Target will produce X-ray through Berillium window
2.
Berillium window placed at direction at 6 degree from anode surface
X-ray spectrum
(a) continuous specttrum
(b)characteristic spectrum
(importance)
use this to reduce Kβ & continuous graph
Kα-kβ Radiation
Kα radiation is energy radiated when electron move from plane n=2 to n=1
X-ray radiation is characteristic of the energy liberated during the electron ttransition
Moseley's Law
The characteristic X-ray frequencies (1/λ) increase regularly with atomic number Z
The wave number changed systematically with photon number when we changed the element.
V ^½ =A(Z – Z 0)
