Medical physics Q a)?An ionization chamber is used with an electrometer capable of measuring 50µA. Calculate the rate at which 0.835MeV beta particles must enter the chamber to just produce a measurable response. ?b)?These beta particles produce on the average 80 ion pairs in a counter operating in the proportional region with a gas amplification factor of 6´104. At what rate will the particles need to enter the chamber to produce an average current of 50µA?