ELECTRON-TRANSFER COLLISION STUDIES ON STORED IONS PRODUCED BY SYNCHROTRON RADIATION

Studies of electron transfer collisions of low energy stored ions with target atoms have been carried out as a function of the well depth of the Penning ion trap. The ions were produced by vacancy cascades following inner-shell photoionization by synchrotron radiation. The ion storage data, following an analysis based on the details of the ion production, storage, and collision processes in the trap, provides information for optimizing the accuracy of electron transfer rate coefficient measurements when several charge state are present. Low trap well depths exceeding a well-defined minimum value are the most useful.