Nuclear Spin and Magnetic Moment ofAr37

Abstract

The hyperfine structure of the $3p^{5}4s-3p^{5}4p$ lines of ${\mathrm{Ar}}^{37}$ i, studied in an electrodeless discharge, has been used to determine the nuclear spin $I\left({\mathrm{Ar}}^{37}\right)=\frac{3}{2}$, and the nuclear magnetic moment $\mu \left({\mathrm{Ar}}^{37}\right)=(+0.95\mathrm{}\pm 0.20)$ nm. The ${\mathrm{Ar}}^{37}$-${\mathrm{Ar}}^{40}$ isotope shift, which has been completely resolved for only one line, tends generally to confirm earlier work.