Electron attachment to molecular clusters by collisional charge transfer

K. H. Bowen, G. W. Liesegang, B. S. Sanders, D. R. Herschbach
1983 The Journal of Physical Chemistry  
Endoergic charge transfer via A + X, -A+ + X,-in single collisions is used to study electron attachment to weakly bound molecular clusters. Two supersonic beams are employed, one to produce fast alkali atoms (usually A = Rb), the other to produce molecular clusters (typically X = Cl, or SO,). From threshold energies for ion-pair formation, nominal electron affinities as a function of cluster size are derived for (ClJ" C1(C12),-1, and (SO,)" with n = 1-4,2-4, and 1-5, respectively. The
more » ... l charge-transfer process which forms the negative cluster ions occurs on a subpicosecond time scale. The results are interpreted in terms of an impulsive-collision model, with incomplete vibrational relaxation for cluster ions larger than dimers.
doi:10.1021/j100227a009 fatcat:5ljak2tzkbdvtp3ilgnlwfnb7q