This paper reports the first demonstration of nuclear orientation of radioactive xenon atoms by spin exchange with polarized rubidium atoms. The nuclear tensor alignment, as measured by gamma-ray anisotropy, is about 30% of the maximum possible. The magnetic dipole moments for ${}_{}{}^{133}{}_{}{}^{}\mathrm{Xe}$, ${}_{}{}^{133}{}_{}{}^{}\mathrm{Xe}_{}^m{}_{}{}^{}$, and ${}_{}{}^{131}{}_{}{}^{}\mathrm{Xe}_{}^m{}_{}{}^{}$ have also been measured by NMR spectroscopy. The methods developed here have possibilities for wide applications to nuclear and atomic studies of other radioactive rare-gas atoms.

• Received 17 July 1984

DOI:https://doi.org/10.1103/PhysRevLett.54.174