Isotopologue-selective excitation studied via optical-optical double resonance using theE3Σ1+(63S1)←A3Π0+(53P1)←X1Σ0+(51S0)transitions in CdAr and CdKr van der Waals complexes

2018 ◽  
Vol 212 ◽  
pp. 32-38 ◽  
Author(s):  
T. Urbańczyk ◽  
J. Dudek ◽  
J. Koperski
Keyword(s):  
Van Der Waals ◽  
Double Resonance ◽  
Selective Excitation ◽  
Van Der Waals Complexes ◽  
Optical Double Resonance

scholarly journals Stimulated Raman–UV Optical Double Resonance Spectroscopy of Van Der Waals Complexes of Benzene

1994 ◽  
Vol 14 (1-3) ◽  
pp. 85-102 ◽  
Author(s):  
Takayuki Ebata ◽  
Seiichi Ishikawa ◽  
Mitsuo Ito ◽  
Shi-Aki Hyodo
Keyword(s):  
Decay Rate ◽  
Rate Constant ◽  
Vibrational Frequency ◽  
Double Resonance ◽  
Van Der Waals Complexes ◽  
Resonance Spectroscopy ◽  
Decay Rate Constant ◽  
Optical Double Resonance ◽  
Benzene Dimer ◽  
Double Resonance Spectroscopy

Spectroscopic and dynamical studies of the van der Waals complexes of benzene–Ar, benzene–N2 and benzene dimer in the electronically ground state (S0) have been performed by the use of stimulated Raman–UV optical double resonance spectroscopy. The vibrational frequency of mode 1 of the complexes and the decay rate constants of the 11 levels (∼993 cm-1) have been measured. The vibrational frequency shifts of mode 1 in S0 upon complex formation were less than 1 cm-1for all the complexes. On the other hand, the decay rate constant due to intramolecular vibrational redistribution and/or vibrational predissociation showed a drastic change. The decay rate constant of the 11 level of the benzene dimer was 2.4 × 107 s-1, while those of the benzene–Ar and benzene–N2 complexes were much smaller than 1 × 106 s-1. It was also found that the decay rate constant in S0 is much smaller than that in S1. For the benzene dimer, the depolarization ratio of Raman band of mode 1 was recalculated by taking into account of the anisotropy of the polarizability of benzene molecule. The comparison between the observed and calculated polarization ratio shows that the benzene dimer has the “T-shaped” structure which was proposed by the group of Felker.

scholarly journals How accurate is the determination of equilibrium structures for van der Waals complexes? The dimer N2O⋯CO as an example

2021 ◽  
Vol 154 (19) ◽  
pp. 194302
Author(s):  
Jean Demaison ◽  
Natalja Vogt ◽  
Yan Jin ◽  
Rizalina Tama Saragi ◽  
Marcos Juanes ◽  
...  
Keyword(s):  
Van Der Waals ◽  
Van Der Waals Complexes ◽  
Equilibrium Structures

Optical-optical double-resonance spectroscopy of BaO

1980 ◽  
Vol 82 (2) ◽  
pp. 310-338 ◽  
Author(s):  
Richard A. Gottscho ◽  
J. Brooke Koffend ◽  
Robert W. Field
Keyword(s):  
Double Resonance ◽  
Resonance Spectroscopy ◽  
Optical Double Resonance ◽  
Double Resonance Spectroscopy

scholarly journals Consecutive Vibrational Redistribution and Predissociation Processes in s-Tetrazine–Argon Van Der Waals Complexes

1983 ◽  
Vol 2 (3-4) ◽  
pp. 125-135 ◽  
Author(s):  
J. J. F. Ramaekers ◽  
L. B. Krijnen ◽  
H. J. Lips ◽  
J. Langelaar ◽  
R. P. H. Rettschnick
Keyword(s):  
Decay Time ◽  
Van Der Waals ◽  
Stagnation Pressure ◽  
Van Der Waals Complexes ◽  
Supersonic Expansion ◽  
Vibrational Predissociation ◽  
Out Of Plane ◽  
Spectrally Resolved ◽  
Plane Mode

s-Tetrazine argon complexes T−Arn (n = 1, 2) are formed in a supersonic expansion of argon seeded with s-tetrazine. The expansion was conducted through a nozzle of 50 or 100 μm with an argon stagnation pressure between 1 and 1.5 bar. From spectrally resolved measurements it is clear that vibrational redistribution processes as well as vibrational predissociation processes take place after SVL excitation within the complex.From rise and decay time experiments it can be concluded, that after excitation of the 6a1 complex level, the above mentioned processes are consecutive and not parallel. It appears that the out of plane mode 16a couples with the Van der Waals stretching mode. The predissociation rate of the 16a2 complex is observed to be 2.3 × 109 s−1.

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