THE RATE OF ION-LINEAR DIPOLE CAPTURE AT EXTREMELY LOW-TEMPERATURES ESTIMATED WITH THE USE OF THE STATISTICAL ADIABATIC CHANNEL MODEL

The rate constant for ion-linear dipole capture is estimated over a ra nge of very small energies using the microcanonical version of the sta tistical adiabatic channel model (SACM). The energy dependence is foun d to be very diverse and not following any simple pattern. The dimensi onless parameters y and zeta affect the issue considerably. Depending on these parameters, the function rate constant as a function of energ y may increase either monotonously or stepwise, it may attain a platea u value at some energy and next, having surpassed some threshold point , may further increase monotonously at a rate that is affected by the magnitude of zeta and y.