ERDA Using E-Detection Conventional Set-Up

In the earlier ERDA measurements, an SBD was used for particle detection. The method is known as ERD, carried in the simplest method or conventional set-up (in the reflection geometry). Since the heavy elements in the sample give rise to high-detected energies, and thus to a background continuum in the 

The detected energy det of a particle recoiled from depth d is given by the following equation  

2 ERDA with Particle Identification and Depth Resolntion 

Since the amount of energy AE lost by the ions with different Z in a given thickness dx is proportional to Mz, it becomes a basis to separate the ions of different species by using a transmission type thin AE detector and a thick E-detector. The ion loses part of its energy in the first AE detector and the rest of energy E is deposited in the second detector. Transmission type AE detector provides information on and hence enables identification of the ion species. The sum of AE and E signals from two detectors provide total energy Et = E AE. 

ERD Using Transmission Telescope (with Gas Ionization Chamber) 

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