TY - GEN AU - BOSLEY,W AU - CRAGGS,J D AU - NASH,W F TI - Some experiments with fast electrons and positrons produced by a 20-MeV. betatron SN - 0028-0836 PY - 2010///0329 KW - Electrons KW - Particle Accelerators N1 - Publication Type: Journal Article UR - https://doi.org/10.1038/160790b0 ER -