Precision measurement of the hyperfine structure and gJ factor of atomic nitrogen 14

The dipolar and quadrupolar hyperfine coupling constants, A and B, respectively, and the atomic gJ factor have been measured for the S324 ground state of atomic nitrogen 14. An atomic hydrogen maser oscillating at the ΔMF=-1 transition in a magnetic field ranging from 0.008 to 8 G was used as a detector of transitions in both hydrogen and nitrogen. The magnetic field was calibrated by the hydrogen Zeeman transition frequency. Values of the constants were found to be A=10450 929.12(10) Hz, B=1.27(10) Hz, and gJ=2.002 134 652(64). These results are compared to current theoretical results and other experimental measurements.