Increase in the efficiency of the isotope-selective infrared laser multiphoton dissociation of $^{11}$BCl$_3$ molecules in a mixture with SF$_6$ serving as a sensitizer and an acceptor of radicals

A strong increase in the efficiency of the isotope-selective infrared laser multiphoton dissociation of $^{11}$BCl$_3$ molecules in the natural mixture with $^{10}$BCl$_3$ by radiation of a pulsed CO$_2$ laser in the case of admixture of SF$_6$ molecules, which serve as a sensitizer and simultaneously acceptors of radicals, Cl atoms formed in the dissociation of BCl$_3$ molecules, has been detected. The yield and selectivity of dissociation of $^{11}$BCl$_3$ molecules increase by several times and the threshold energy density for the dissociation of molecules decreases significantly in the case of their irradiation in the mixture with SF$_6$ compared to irradiation without SF$_6$. This property allows the single-frequency isotope-selective dissociation of $^{11}$BCl$_3$ molecules by unfocused laser radiation at a moderate energy density ($\approx$ 3–5 J/cm$^2$), which is important and relevant for the practical implementation of the laser separation of boron isotopes.