Hyperfine structure and gJ value of the F924 and P524 levels of Cu63 and Cu65

The hyperfine structure of the (3d94s4p) F924 and P524 metastable levels in Cu63 and Cu65 have been measured by the atomic-beam magnetic-resonance method. When corrected for second-order interactions with neighboring fine-structure levels from the (3d94s4p) configuration, the hfs interaction constants are A63(F924)=1323.891(1) MHz, A65(F924)=1418.123(2) MHz, A63(P524)=2031.239(1) MHz, A65(P524)=2175.811(2) MHz, B63(F924)=137.874(5) MHz, B65(F924)=127.586(19) MHz, B63(P524)=78.993(4) MHz, B65(P524)=73.111(9) MHz, The octupole interaction constants are of the order of the experimental uncertainties. From the Zeeman effect of the hfs, we find gJ(F924)=1.3340(2) and gJ(P524)=1.600(2). By making use of the ratio A63A65 in the S122, the F924, and the P524 states, we infer that gI63gI65=0.933 524(5) and that Δ6563(S122)=0.000 048(5). We also find that Q63Q65=1.080 54(14). © 1969 The American Physical Society.