Study of the Multiple Scattering of Fast Charged Particles in a Gas. II. (Negative and Positive Beta-Particles)

The experimental study of the multiple scattering of electrons in a gas has been extended to include electrons of momenta up to 10,200 gauss-cm. The results of these measurements are compared with predictions of various theories of multiple scattering. Furthermore, a parallel investigation of the multiple scattering of positrons has been carried out over the momentum range between 2000 and 9000 gauss-cm. The rms angle of multiple scattering for the positrons is found to be approximately ten percent less than for electrons of the same momentum.