A steel-scintillator sandwich counter was used as a simple and highly efficient detector for both neutrons and protons. The validity of simple approximations for the detection efficiency was investigated by experimental tests and a detailed Monte Carlo calculation of the nuclear and electromagnetic cascades in the counter.
Bibliographical noteFunding Information:
* Work supported by the U.S. Atomic Energy Commission. ? Present address: School of Physics, University of Minnesota, Minneapolis, Minn. 55455, U.S.A. + Present address: Department of Physics, University of Ham-burg, 2000 Hamburg-50, W. Germany.