A STUDY OF CONTACT-PROCESSES IN COULOMB 3-BODY SYSTEMS WITH UNIT CHARGES

The contact processes between positive particles from the ground bound states of Coulomb three-body systems with unit charges such as X+Y+Z- are considered. The probability amplitude for the contact processes is proportional to the expectation value of the respective Dirac delta function, e.g. [delta(r++)]. It is shown that for a large number of similar systems the contact (X+, Y+) process (or (X+, Y+) reaction) from the ground bound state of the three-body system X+Y+Z- proceeds through the three-particle collision.