Abstract
The changes of O-Ps intensity in benzene and cyclohexane solutions in the presence of different concentrations of electron scavenger (CCl 4) and positive hole scavenger (pyridine) have been investigated. The results show that mobilities of both electron and positive ion in cyclohexane are very high. Their mobilities in benzene are also high but less than that in cyclohexane. The fitting equation for the enhancement of O-Ps intensity in the presence of hole scavenger was derived, which shows that enhancement or inhibition of O-Ps intensity are consequences of the competition of the two processes of scavenging electron and scavenging positive ion. The absolute amount of enhancement of O-Ps intensity is not only related to the scavenging rate but also to the O-Ps intensity in pure positive hole scavenger.
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