Isotope Effects on Franck—Condon Factors. VI. Pressure‐Broadened Absorption Intensities of the Schumann—Runge Bands of 16O2 and 18O2

1966 ◽  
Vol 44 (6) ◽  
pp. 2406-2408 ◽  
Author(s):  
M. Halmann
Keyword(s):  
Isotope Effects ◽  
Condon Factors ◽  
Franck Condon

Triplett-Lebensdauern von Diphenylpolyenen und deuterierten Stilbenen in eingefrorener Lösung bei 77°K / Triplet Lifetime of Diphenylpolyenes and deuterated Stilbenes in frozen solution at 77°K

1970 ◽  
Vol 25 (5) ◽  
pp. 496-499 ◽  
Author(s):  
G. Heinrich ◽  
G. Holzer ◽  
H. Blume ◽  
D. Schulte-Frohlinde
Keyword(s):  
Isotope Effects ◽  
Triplet States ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Triplet Energy ◽  
Radiative Process ◽  
Frozen Solution ◽  
Condon Factors ◽  
Franck Condon ◽  
Triplet Lifetime

The lowest triplet states of diphenylpolyenes and of deuterated stilbenes were observed by means of photoflash asportion spectroscopy. The diphenylpolyenes do not show phosphorescence. The triplet lifetime is strongly dependent on triplet energy. This is consistent with the known influence of Franck-Condon factors. The triplet lifetime of partially deuterated stilbenes depends on the number and the position of the deuterium atoms. The effect of olefinic monodeuteration on the non-radiative process is approximately 16 times larger than that of deuteration at an aromatic position. The observations can be explained in terms of isotope effects on vibronic spin-orbit coupling.

Identification of the photoelectron spectra of HFCS via computing Franck–Condon factors

2021 ◽  
pp. 113393
Author(s):  
Jia-Lin Chang ◽  
Wen-Hsin Kuo ◽  
Yun-Jhu Huang ◽  
Mu-Fong Chang ◽  
Jui-Yang Huang ◽  
...  
Keyword(s):  
Photoelectron Spectra ◽  
Condon Factors ◽  
Franck Condon

THEORETICAL TRANSITION PROBABILITIES FOR THE $\tilde{A}^{2}A_{1} -\tilde{X}^{2}B_{1}$ SYSTEM OF H2O+ AND D2O+ AND RELATED FRANCK–CONDON FACTORS BASED ON GLOBAL POTENTIAL ENERGY SURFACES

2005 ◽  
Vol 04 (01) ◽  
pp. 225-245 ◽  
Author(s):  
IKUO TOKUE ◽  
KATSUYOSHI YAMASAKI ◽  
SATOSHI MINAMINO ◽  
SHINKOH NANBU
Keyword(s):  
Potential Energy ◽  
Photoelectron Spectroscopy ◽  
Potential Energy Surfaces ◽  
Least Squares Method ◽  
Transition Probabilities ◽  
Three Dimensional ◽  
Equilibrium Geometry ◽  
Condon Factors ◽  
Energy Surfaces ◽  
Franck Condon

To elucidate the ionization dynamics, in particular the vibrational distribution, of H 2 O +(Ã) produced by photoionization and the Penning ionization of H 2 O and D 2 O with He *(2 3S) atoms, Franck–Condon factors (FCFs) were given for the [Formula: see text] ionization, and the transition probabilities were presented for the [Formula: see text] emission. The FCFs were obtained by quantum vibrational calculations using the three-dimensional potential energy surfaces (PESs) of [Formula: see text] and [Formula: see text] electronic states. The global PESs were determined by the multi-reference configuration interaction calculations with the Davidson correction and the interpolant moving least squares method combined with the Shepard interpolation. The obtained FCFs exhibit that the [Formula: see text] state primarily populates the vibrational ground state, as its equilibrium geometry is almost equal to that of [Formula: see text], while the bending mode (ν2) is strongly enhanced for the H 2 O +(Ã) state; the maximums in the population of H 2 O + and D 2 O + are approximately v2 = 11–12 and 15–17, respectively. These results are consistent with the distributions observed by photoelectron spectroscopy. Transition probabilities for the [Formula: see text] system of H 2 O + and D 2 O + show that the bending progressions consist primarily of the [Formula: see text] emission, with combination bands from the (1, v′2 = 4–8, 0) level being next most important.

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