Shape‐resonance‐induced non‐Franck–Condon effects in the valence‐shell photoionization of O2

1982 ◽  
Vol 76 (12) ◽  
pp. 5703-5709 ◽  
Author(s):  
P. M. Dittman ◽  
Dan Dill ◽  
J. L. Dehmer
Keyword(s):  
Shape Resonance ◽  
Valence Shell ◽  
Franck Condon

scholarly journals Attosecond timing of electron emission from a molecular shape resonance

2020 ◽  
Vol 6 (31) ◽  
pp. eaba7762 ◽  
Author(s):  
S. Nandi ◽  
E. Plésiat ◽  
S. Zhong ◽  
A. Palacios ◽  
D. Busto ◽  
...  
Keyword(s):  
Potential Barrier ◽  
Molecular Spectroscopy ◽  
Molecular Shape ◽  
High Spectral Resolution ◽  
Shape Resonance ◽  
Nuclear Motion ◽  
Centrifugal Barrier ◽  
Ionization Time ◽  
Molecular Photoionization ◽  
Franck Condon

Shape resonances in physics and chemistry arise from the spatial confinement of a particle by a potential barrier. In molecular photoionization, these barriers prevent the electron from escaping instantaneously, so that nuclei may move and modify the potential, thereby affecting the ionization process. By using an attosecond two-color interferometric approach in combination with high spectral resolution, we have captured the changes induced by the nuclear motion on the centrifugal barrier that sustains the well-known shape resonance in valence-ionized N2. We show that despite the nuclear motion altering the bond length by only 2%, which leads to tiny changes in the potential barrier, the corresponding change in the ionization time can be as large as 200 attoseconds. This result poses limits to the concept of instantaneous electronic transitions in molecules, which is at the basis of the Franck-Condon principle of molecular spectroscopy.

Shape-resonance-induced non-Franck-Condon vibrational intensities in 3 σgphotoionisation of N2

1980 ◽  
Vol 13 (3) ◽  
pp. L105-L108 ◽  
Author(s):  
J B West ◽  
A C Parr ◽  
B E Cole ◽  
D L Ederer ◽  
R Stockbauer ◽  
...  
Keyword(s):  
Shape Resonance ◽  
Franck Condon

scholarly journals A Near-Threshold Shape Resonance in the Valence-Shell Photoabsorption of Linear Alkynes

2015 ◽  
Vol 119 (50) ◽  
pp. 12339-12348 ◽  
Author(s):  
U. Jacovella ◽  
D. M. P. Holland ◽  
S. Boyé-Péronne ◽  
Bérenger Gans ◽  
N. de Oliveira ◽  
...  
Keyword(s):  
Shape Resonance ◽  
Valence Shell ◽  
Near Threshold

scholarly journals Shape-resonance-induced non-Franck-Condon vibrational intensities in 3σg photoionization of N₂

1979 ◽  
Author(s):  
J. B. West ◽  
Albert C. Parr ◽  
Roger Stockbauer ◽  
B. E. Cole ◽  
D. L. Ederer ◽  
...  
Keyword(s):  
Shape Resonance ◽  
Franck Condon
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