Calculation of the ground-state energy and studies of other properties of exotic helium atoms with the use of boundary conditions of wave function

The minimum energy and average distance between particles of doubly muonic helium atoms Hemumu (He2+ + 2mu), are calculated with the use of a wave function that satisfies boundary conditions such as the behavior of the wave function when two particles are close to each other or far away from each other. In this wave function, the muon-muon correlation in doubly muonic helium atoms is described to arrive at the correct behavior for r(12) tending to zero and infinity. It is shown that the obtained results are very close to the values calculated by others. Finally, to confirm the method and results, calculated values are compared with a similar electronic system, and it is shown that the small differences in the energies of Hemumu and He are due to the reduced masses, as expected. In addition to being very simple, the proposed wave function provides relatively accurate values for the energy and expectation values of r(2n), emphasizing the importance of the local properties of the wave functions. (C) 2004 Wiley Periodicals, Inc.