Abstract
20Na ( T 1 2 = 445 ms) and 36K ( T 1 2 = 340 ms) have been produced in rare gas targets by (p, n) reactions and polarized by means of spin-exchange scattering with optically pumped 87Rb. The asymmetry in the β-decay of polarized nuclei served to detect r.f. transitions between h.f.s. Zeeman levels of the atomic ground states, yielding spins I( 20 Na) = 2, I( 36 K) = 2 , and h.f.s. splittings ΔW( 20 Na) = 276.855(3) MHz , ΔW( 36 K) = 604.5(1.1) MHz from which the magnetic moments μ I,( 20 Na) = 0.3694(2) n.m. and μ I( 36 K) = 0.548(2) n.m. (corrected for diamagnetism) were deduced. The magnetic moments are discussed in connection with 20F and 36Cl, the mirror nuclei belonging to the same isospin triplets.
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