41. Yukawa proposed that this field describes the force between two nucleons in an atomic nucleus. 42. The strong nuclear force basically makes nucleons ( like protons ) attract to each other. 43. He became known for his work on nucleon form factors, an interest which continues. 44. Nucleons and anti-nucleons create pions.45. Nucleons and anti-nucleons create pions. 46. He also did research using polarized electron beams to examine the spin structure of nucleons . 47. For our purposes, we will ignore the electrons, and focus solely on the nucleons . 48. Protons and neutrons are called nucleons . 49. Fermions are particles " like electrons and nucleons " and are the usual constituents of matter. 50. Nucleons look a lot bigger to each other than they do to photons of this energy.
