Hyperfine Structures of Silver and Gold by the Atomic Beam Magnetic Resonance Method

Abstract

An ionizer of the electron bombardment type has been applied to a beam of atoms in a magnetic resonance apparatus. The ionization efficiency for potassium atoms has been found to be 1 part in 3000. The new ionizer has made it possible to study the hyperfine structures and the $g$ factors of the ground states of silver and gold, two elements which cannot be detected by the surface ionization method commonly used heretofore. The measurements yield the following results: $|\ensuremath{\Delta}\ensuremath{\nu}({\mathrm{Ag}}^{107})|=1712.56\ifmmode\pm\else\textpm\fi{}0.04 \mathrm{M}\mathrm{c}/\mathrm{s}\mathrm{e}\mathrm{c},$ $|\ensuremath{\Delta}\ensuremath{\nu}({\mathrm{Ag}}^{109})|=1976.94\ifmmode\pm\else\textpm\fi{}0.04 \mathrm{M}\mathrm{c}/\mathrm{s}\mathrm{e}\mathrm{c},$ $\frac{{g}_{J}(\mathrm{Ag})}{{g}_{J}(\mathrm{Cs})}=0.99987\ifmmode\pm\else\textpm\fi{}0.00010,$ $|\ensuremath{\Delta}\ensuremath{\nu}({\mathrm{Au}}^{197})|=6107.1\ifmmode\pm\else\textpm\fi{}1.0 \mathrm{M}\mathrm{c}/\mathrm{s}\mathrm{e}\mathrm{c},$ $\frac{{g}_{J}(\mathrm{Au})}{{g}_{J}(\mathrm{Cs})}=1.00081\ifmmode\pm\else\textpm\fi{}0.00005.$