Production of Spin Polarized Li Isotope Beam through Heavy Ion reactions

Spin polarized radioactive nuclear beams are useful for materials science as beta-NMR probes which exhibit extremely high sensitivity to the NMR detection. So far, short-lived beta-NMR probe nucleus $^{8}$Li ($I=$ 2$^{+}$, $T_{1/2}=$ 838 ms) has been used strongly for the materials science. In the present study, we have performed the production test of polarized $^{8}$Li and another candidate of $^{9}$Li ($I=$ 3/2$^{-}$, $T_{1/2}=$ 178 ms) through the heavy ion reactions at HIMAC in NIRS. Polarized $^{8,9}$Li nuclei were produced by using $^{10,11}$B or $^{12}$C primary beams at an energy of 70 $A $MeV with a Be target. Polarization was observed for $^{8}$Li at high momentum side with other than a $^{10}$B beam. The result of $^{9}$Li suggests the possibility that large polarization is generated with a $^{10}$B beam which picks up a neutron in the reaction process.