Question

The kinetic energy of the primary ion should be in which of the following range?

(a) 0.1-4 keV

(b) 0.2-1 keV

(c) 0.4-2 keV

(d) 0.3-5 keV

This question was posed to me in an online interview.

This intriguing question comes from Ion Spectroscopy in section Electron and Ion Spectrometers of Analytical Instrumentation

Answer 1

Right choice is (d) 0.3-5 keV

To explain: The kinetic energy of the primary ion should be 0.3-5 keV. These primary ions are made incident on the surface.