The nature of the effect of precession-frequency mismatch between $^{129}$Xe and $^{131}$Xe nuclei under spin-exchange pumping by alkali-metal atoms

The effect of precession-frequency mismatch between $^{129}$Xe and $^{131}$Xe xenon-isotope nuclei, which arises under spin-exchange pumping by optically oriented alkali-metal (Cs) atoms and affects the characteristics of measuring and navigation devices based on balanced Schemes with spin-exchange pumping of xenon isotopes, has been investigated. An attempt to explain this effect has been made, and methods for its minimization and elimination have been proposed and experimentally verified.