Ps2- in a magnetic field : structure and stability in the M=0 state.

Abstract

The energy of the Ps2- (three electrons and two positrons or vice versa) system and all possible fragmentations are calculated in a magnetic field in their M=0 states using the stochastic variational method with a deformed correlated Gaussian basis set. The stability of the system at various field strengths is assessed through comparison of the system's energy to the threshold energy. Examination of the single particle and pairwise densities is also employed for assessment of stability. The structure of the system is examined through calculation of distances between the charged particles. The M=0 state of Ps2- is found to be stable in fields greater than 0.01 a.u.