XRD

1. X-RAY DIFFRACTION-
MODULE 4
- TA N I YA P E A R L E R
A S S I S TA N T P R O F E S S O R
M E S C O L L E G E M A R A M PA L LY

2. X-Ray Diffraction
X-rays were discovered in 1895 by the German physicist Wilhelm
Conrad Röntgen and were so named because their nature was
unknown at the time. He was awarded the Nobel Prize for physics in
1901.
X ray, invisible, highly penetrating electromagnetic radiation of
much shorter wavelength (higher frequency) than visible light. The
wavelength range for X rays is from about 10-8 m to about 10-11 m,
the corresponding frequency range is from about 3 × 1016 Hz to
about 3 × 1019 Hz.

5. PRINCIPLE

6. 2dsinθ = nλ
Where d is the spacing between diffracting
planes, θ is the incident angle, n is an integer,
and λ is the beam wavelength

7. Productionand Detectionof X-rays

14. a)Production of X-rays

18. Moseley's law
Moseley's law is an empirical law concerning
the characteristic x-rays that are emitted by
atoms. The law was discovered and published
by the English physicist Henry Moseley in 1913.

23. b)Collimator

25. C) Monochromator

29. d)Detectors