Role of excited electronic states in the interactions of fast (MeV) molecular ions with solids and gases

1979 ◽  
Vol 20 (3) ◽  
pp. 834-854 ◽  
Author(s):  
E. P. Kanter ◽  
P. J. Cooney ◽  
D. S. Gemmell ◽  
K. -O. Groeneveld ◽  
W. J. Pietsch ◽  
...  
2008 ◽  
Vol 128 (14) ◽  
pp. 144310 ◽  
Author(s):  
Jesús R. Flores ◽  
Adán B. González

We report the observation of electronic emission spectra in the tetrahedral molecular ions CF+4 and SiF+4. The spectra are observed at a low rotational temperature (less than 30 K) in a crossed molecular-beam - electron-beam apparatus (Carrington & Tuckett 1980). These spectra are especially interesting because the fluorescing states in the two ions lie up to 10 eV above their lowest dissociation channel (to CF+3/SiF+3 + F; see figure 1), and these states might be expected to decay non-radiatively rather than by a radiative channel. The observation of fluorescence decay from highly excited electronic states of these polyatomic ions is therefore a very surprising phenomenon.


2008 ◽  
Vol 105 (22) ◽  
pp. 7658-7663 ◽  
Author(s):  
M. Citroni ◽  
R. Bini ◽  
P. Foggi ◽  
V. Schettino

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