Hyperfine Structure of the Metastable(4p)5(5s)P23State ofKr8336

Abstract

The hyperfine structure (hfs) of the metastable ${(4p)}^{5}(5s)^{3}P_{2}$ state of $_{36}\mathrm{Kr}^{83} (I=\frac{9}{2})$ has been measured by the atomic beam magnetic resonance method. The zero magnetic field intervals are: $f(\frac{11}{2}\ensuremath{\leftrightarrow}\frac{13}{2})=1830.7236(5)$ Mc/sec, $f(\frac{9}{2}\ensuremath{\leftrightarrow}\frac{11}{2})=1341.8217(2)$ Mc/sec, $f(\frac{7}{2}\ensuremath{\leftrightarrow}\frac{9}{2})=956.5583(2)$ Mc/sec, and $f(\frac{5}{2}\ensuremath{\leftrightarrow}\frac{7}{2})=656.0844(30)$ Mc/sec.The four frequencies (after correction for second-order hyperfine interaction) are expected to be linearly related to only three interaction constants: ${A}^{\ensuremath{'}}$, ${B}^{\ensuremath{'}}$, and ${C}^{\ensuremath{'}}$ (respectively dipole, quadrupole, and octupole). The fit is satisfactory if, and only if, second-order hyperfine interaction is taken into account. The quadrupole and octupole moments of $_{36}\mathrm{Kr}^{83}$ are $\ensuremath{\Omega}=\ensuremath{-}0.18(6)$ nm b (nuclear magneton barn) and $Q=+0.270(13)$ b. These values include no polarization corrections or corrections for any effects of configuration mixing.