The use of K(nd) Rydberg atoms to investigate low-energy electron-molecule interactions

[摘要] Negative ion formation through electron transfer in collisions between K(nd) Rydberg atoms (10 $leq$ n $leq$ 110) and C$sb7$F$sb{14}$ and 1,1,1-C$sb2$Cl$sb3$F$sb3$ is studied and provides a novel means to explore electron capture by these molecules at sub-thermal energies. The data suggest electron attachment to C$sb7$F$sb{14}$ occurs through two channels, one leading to the formation of long-lived C$sb7$F$sb{14}sp-$ ions and the other to C$sb7$F$sb{14}sp-$ ions that experience rapid autodetachment. On the other hand, electron attachment to 1,1,1-C$sb2$Cl$sb3$F$sb3$ results directly in dissociation and the formation of Cl$sp-$ ions. The present data are discussed in light of earlier results obtained with swarm and threshold photoelectron spectroscopy techniques.

[发布机构] Rice University

[效力级别] physics