Alpha-spin State and Beta-spin State. (externally applied field) a-spin state B-spin state (lower energy) (higher energy) Copyght010 Pearson Prentice Ha Inc The lower energy state with the proton aligned with the field is called the alpha-spin state. The higher energy state with the proton aligned against the external magnetic field is called the beta- spin state. Chapter 13 5 Chapter 13 5 Alpha-spin State and Beta-spin State. • The lower energy state with the proton aligned with the field is called the alpha-spin state. • The higher energy state with the proton aligned against the external magnetic field is called the beta￾spin state