Nuclear Gyromagnetic Ratios. III

The super-regenerative oscillator techniques described in earlier reports have been modified by introduction of a tuned narrow band amplifier with chart recorder and by improvements in magnetic-field regulation. Magnetic resonance frequencies of various nuclei have been compared with the resonance frequencies of ${\mathrm{H}}^1$, ${\mathrm{D}}^2$, ${\mathrm{Li}}^7$, and ${\mathrm{Sc}}^{45}$, which have been used as "standards." Ratios of the observed resonance frequencies to the proton resonance frequency in the same magnetic field are given for the following nuclear species: ${\mathrm{Be}}^9$, ${\mathrm{B}}^{11}$, ${\mathrm{F}}^{19}$, ${\mathrm{Na}}^{23}$, ${\mathrm{Al}}^{27}$, ${\mathrm{P}}^{31}$, ${\mathrm{V}}^{51}$, ${\mathrm{Mn}}^{55}$, ${\mathrm{Cu}}^{63}$, ${\mathrm{Cu}}^{65}$, ${\mathrm{Br}}^{79}$, ${\mathrm{Br}}^{81}$, ${\mathrm{Rb}}^{87}$, ${\mathrm{Nb}}^{93}$, ${\mathrm{I}}^{127}$, ${\mathrm{Cs}}^{133}$, ${\mathrm{La}}^{139}$, ${\mathrm{Tl}}^{203}$, and ${\mathrm{Tl}}^{205}$. The nuclear magnetic moments of these species have been determined in terms of the proton moment from the known spins and the observed frequency ratios after making diamagnetic corrections; values for the nuclear magnetic moments are listed.