  The high sensitivity of lithium detector to pep- and Be7-neutrinos makes a
lithium radiochemical detector a powerful tool for the search of the
oscillations of solar neutrinos. The first phase of lithium experiment on the
installation with 10 tons of metallic lithium will enable to collect data
within 1 year of measurements to provide very definite information about SMA
MSW solution. the second phase with 10 modules 10 tons each will measure the
semiannual variations of the signal, thus the contributions of pep- and
Be7-lines will be weighted, what will give a "smoking-gun" evidence about
"just-so" solution for large mixing angles and delta-m2 about 10-10 - 10-9 eV2.
If both regions are not confirmed the results of lithium detector can be
interpreted in favor of LMA MSW solution.
