Electron Spin Resonance Study of the $Q_{1}$ Color Center in KCl:RbCl Crystals

概要

論文の詳細を見る
ESR of the $Q_{1}$ center which is especially associated with Rb87 nucleus with less natural abundance has been thoroughly studied. The isotropic and anisotropic hyperfine interaction constants of Rb87 nucleus which is sited at the nearest neighbors surrounding the anion vacancy are 373 Mc/sec and 12.6 Mc/sec, respectively. The $g$-value shift has been observed from that of the $F$ center at $+1.4\times 10^{-3}$, the-amount being explained by Breit and Rabi expression. The angular-independent half-width of the $Q_{1}^{87}$ ESR line is $56.6\pm 0.4$ gauss. Analysis of these data suggests that the center of the electron-density for the ground state of the $Q_{1}$ center is displaced from the center of the anion vacancy to K+ ion opposite to the Rb+ ion along the symmetry axis $\langle 100\rangle$. A tentative calculation using the Gourary and Adrian wave function gives a reasonable agreement with our suggestion. The off centered electronic structure for the normal $F_{A}$ center is also inferred.
Physical Society of Japanの論文
1968-02-05