Question

A beam of electrons accelerated by a voltage V hits a target made of atoms of atomic number Z=20 . Suppose the atom ( Z=20) has a spherical and uniform distribution of outer electrons , so that Bohr's model can be used to describe its inner electron. An electron from the accelerated beam hits an atom of the target and ejects the innermost electron of the atom. Assuming that the electron of the beam transferred all its kinetic energy to the atom and neglecting the recoil of the atom itself, find

a) the accelerating voltage

b) A K_β transition ( thats is a 3-->1 transition) occurs to fill the vacancy left behind by the ejected electron and the K_{β line is analyzed by a Bragg spectrometer . The first maximum is observed at 4.9⁰ angle . What is the crystal spacing, d}

Answer 1