Determination of asymptotic normalization coefficients for the $^{7}$Li$\to α+ ^{3}$He channel

Asymptotic normalization coefficients (ANCs) $C_{3/2}$ and $C_{1/2}$ for the channels $^7$Li$(3/2^-;0$ MeV)$\to \alpha+^3$H and $^7$Li$(1/2^-;0.478$ MeV)$\to \alpha+^3$H, respectively, were determined by analyzing elastic $\alpha^3$H- scattering data using three different methods. All three methods yield similar results. The ANC values averaged over the three methods are $C_{3/2}=2.08\pm 0.10$ fm$^{-1/2}$ and $C_{1/2}=2.00\pm 0.10$ fm$^{-1/2}$. Comparison of the found ANCs with the previously obtained ANCs for $^7$Be confirms the relationship linking the ANC values for mirror nuclei.