| A comprehensive study is made of the hyperfine structure of the helium isotope 3He for all states up to n = 10 and L = 7. High precision values of the hyperfine structure parameters CSS', DS, and ESS' are calculated using the doubled-basis-set Hylleraas-type wave functions developed by Drake. In this calculation, the singlet-triplet states mixing, the Breit relativistic, QED and finite nuclear size effects are included. Hyperfine splittings and hyperfine shifts have been calculated by diagonalizing the complete fine and hyperfine interaction matrix. Our results nicely agree with the available experimental ones. One of the applications of the calculated hyperfine shift is to determine the nuclear radius of 3He. This work forms a complete description of hyperfine structure of 3 He. |
