The range-energy relation for 0.1-600 keV electrons

Available data on the range of electrons with energies less than 600 keV in air and other light materials are reviewed critically. It is shown that the practical (extrapolated) range R p (in g cm -2 ) can be related to the energy E(in keV) by using the following expressions: x=lgE;y=lgR p y=-6.160+2.585x-0.220x 2 (E>100 keV) y=-5.100+1.358x+0.215x 2 -0.043x 3 (0.1<E<100 keV). The need for further work at energies less than 10 kEv is stressed.