244 Chapter 4. Liquid Filled Detectors
Problems
1.Loss of electrons through recombination is a serious problem in detectors that
use liquids as ionizing media. One way to reduce recombination probability is
to increase the electric field intensity. Derive the expression for the change in
recombination rate with respect to the change in electric field intensity.2.Determine the electric field intensity needed to keep the recombination rate of
electrons below 1% in a parallel plate liquid xenon filled ionization chamber.3.Compare the lifetimes of electrons in liquid argon and liquid xenon if these
liquids contain 5ppmof oxygen as impurity.4.Calculate the threshold velocity of electrons to produce Cherenkov light in
heavy water.5.Compare the threshold energy of an electron to that of a proton for producing
Cherenkov light in light water.