Approach to determine nodal surfaces of some s-electron systems.

The paper is devoted to the study of the nodal surfaces of the wave functions for fermion systems. Using the quantum Monte Carlo method, implicit equations of nodal surfaces for some s-electron systems containing two-five electrons are numerically obtained. The obtained results are in agreement with the provisions of other researchers. An original method for constructing nodal surfaces is proposed, which is convenient for the implementation of quantum Monte Carlo.