On the Nuclear Spins and Magnetic Moments of the Principal Isotopes of Potassium

摘要: The spin of the ${\mathrm{K}}^{39}$ nucleus and hfs separation $^{2}S_{\frac{1}{2}}$ normal state were measured by deflection a beam neutral atoms in weak inhomogeneous magnetic field, produced system parallel wires carrying current. To attain required resolution narrow beams long paths (141 cm) used. nuclear was found to be 3/2. separation, $\ensuremath{\Delta}\ensuremath{\nu}$, method "zero moments," which utilizes fact that moment some levels vanishes at certain values field. A plot variation intensity center pattern with respect field yields distinct maxima these fields. If is known can deduced accuracy. value $\ensuremath{\Delta}\ensuremath{\nu}$ 0.0152\ifmmode\pm\else\textpm\fi{}0.0006 ${\mathrm{cm}}^{\ensuremath{-}1}$. Using modified Goudsmit formula, one obtains 0.39 for (in units $\frac{{\ensuremath{\mu}}_{0}}{1838}$). sufficient resolve "peak" due ${\mathrm{K}}^{41}$ moments." greater than 1/2, ratio moments $\frac{{\ensuremath{\mu}}_{41}}{{\ensuremath{\mu}}_{39}}$ between limits 0.42 0.88 depending on ${\mathrm{K}}^{41}$.