Nuclear Magnetic Resonance of ${\mathrm{Tc}}^{99}$ in Tc Metal and ${\mathrm{Tc}}^{99}$ and ${\mathrm{V}}^{51}$ in Tc-V Alloys

The nuclear magnetic resonance of ${\mathrm{Tc}}^{99}$ has been observed in Tc metal and its Knight shift measured relative to a solution of CsTc${\mathrm{O}}_4$. The ${\mathrm{Tc}}^{99}$ and ${\mathrm{V}}^{51}$ resonances have been studied in 50-50 at.% TcV and Tc${\mathrm{V}}_3$ alloys as a function of field and temperature. The ${\mathrm{Tc}}^{99}$ resonance curves in TcV and Tc${\mathrm{V}}_3$ have a Lorentzian shape while ${\mathrm{V}}^{51}$ is Gaussian in TcV and Lorentzian in Tc${\mathrm{V}}_3$. Probable causes for the shape changes and excess widths encountered are discussed.